Date   

(No subject)

Tommy Gober
 

No station is an island entire of itself;
every station is a piece of the ionosphere, a part of the whole;
if a final be burned out by a mismatch, ham radio is the less,
as well as if a radio club were,as well as any manner of thy friends or of thine own were;
any SK's death diminishes me,
because I am involved in mankind.
And therefore never send to know for whom
the bell tolls; it tolls for thee. 


Re: BCB HI-Pass Filter

WA0ITP
 

GA Jim

18t T50-2  is what I used  20t T37-2 if you're rather use those.

Good luck and let us know how it works for you.
72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com
On 5/9/2017 1:28 PM, 'Jim Sheldon' w0eb@... [4sqrp] wrote:

 

Hi Terry,
How many turns & what core for the two 1.66uh inductors?  

Jim - W0EB

------ Original Message ------
From: "WA0ITP wa0itp@... [4sqrp]" <4sqrp@...>
Sent: 5/9/2017 12:50:53 PM
Subject: [4sqrp] Fwd: BCB HI-Pass Filter [3 Attachments]

GM Dave,

Attached is a Hi Pass Filter  that I've used for years when needed.  I'm using it now on the my Cricket. two kilowatt bcb stations, each abt 2 miles away make it mandatory for me on DC rcvrs.

It's an easy Manhattan build. GL and let us know how it goes.

72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com



Re: BCB HI-Pass Filter [3 Attachments]

Jim Sheldon
 

Hi Terry,
How many turns & what core for the two 1.66uh inductors?  

Jim - W0EB

------ Original Message ------
From: "WA0ITP wa0itp@... [4sqrp]" <4sqrp@...>
To: davebelville@...; "4sqrp@..." <4sqrp@...>
Sent: 5/9/2017 12:50:53 PM
Subject: [4sqrp] Fwd: BCB HI-Pass Filter [3 Attachments]

GM Dave,

Attached is a Hi Pass Filter  that I've used for years when needed.  I'm using it now on the my Cricket. two kilowatt bcb stations, each abt 2 miles away make it mandatory for me on DC rcvrs.

It's an easy Manhattan build. GL and let us know how it goes.

72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com


Re: BCB HI-Pass Filter [3 Attachments]

Bob Zolecki
 

Thanks Terry

72 de KR9Z


-----Original Message-----
From: WA0ITP wa0itp@... [4sqrp] <4sqrp@...>
To: davebelville ; 4sqrp <4sqrp@...>
Sent: Tue, May 9, 2017 1:51 pm
Subject: [4sqrp] Fwd: BCB HI-Pass Filter [3 Attachments]

 
GM Dave,

Attached is a Hi Pass Filter  that I've used for years when needed.  I'm using it now on the my Cricket. two kilowatt bcb stations, each abt 2 miles away make it mandatory for me on DC rcvrs.

It's an easy Manhattan build. GL and let us know how it goes.

72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com



Re: Cricket Chirps but...

Jim, N5IB
 

I've encountered similar problems with BCB interference. Often the type of antenna tuner used will make the difference. Many autotuners are L-network configurations, with shunt capacitive elements, making them inherently low-pass networks. I believe the T1 is this configuration, but don't have a schematic of the AT200Pro. (have the tuner, but they don't publish the sch in the manual)

In one particularly troublesome case, using the rig's internal L-network autotuner left it susceptible to BCB interference, but bypassing the internal tuner and using an external T-match tuner took care of the problem.

The T-match, with its shunt inductive element, is inherently high-pass, and can provide at least some degree of attenuation of BCB signals, often enough to prevent the overload. The MFJ-969 is of this type.

The downside, of course, is that a high-pass type tuner does not help suppress harmonics from the Tx.
But if the Tx was clean to begin with - no harm, no foul.

Your other option, of course, is to build a simple high pass filter with a cutoff a bit above 3 MHz. I'd put it in line between the Cricket and the tuner, so it can see a nice, friendly, 50 ohm environment.

N5IB






---In 4sqrp@..., <davebelville@...> wrote :

Thanks for the info David. I am using a G5RV with it also but am using it with a LDG AT200ProII tuner. Maybe I will try a different tuner. I have an Elecraft T1 I can try. I can also try it with my end fed wahr and unun.
Thanks again for the information. I really want to make the little critter work. 

73 Dave, KD9VT


BCB HI-Pass Filter

WA0ITP
 

GM Dave,

Attached is a Hi Pass Filter  that I've used for years when needed.  I'm using it now on the my Cricket. two kilowatt bcb stations, each abt 2 miles away make it mandatory for me on DC rcvrs.

It's an easy Manhattan build. GL and let us know how it goes.

72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com


Re: Cricket Chirps but...

Dave Belville
 

Thanks for the info David. I am using a G5RV with it also but am using it with a LDG AT200ProII tuner. Maybe I will try a different tuner. I have an Elecraft T1 I can try. I can also try it with my end fed wahr and unun.
Thanks again for the information. I really want to make the little critter work. 

73 Dave, KD9VT


Re: Cricket Chirps but...

David Wilcox
 

I had the same problem using my straight through G5RV and end fed whar with a unon, but when I passed it through my MFJ 969 tuner it filtered out the BCB signal.  Mine is on 1310 KHz and is only two miles away.  You might have to use some kind of tuner or filter.

Dave K8WPE

On May 9, 2017, at 9:00 AM, davebelville@... [4sqrp] <4sqrp@...> wrote:

 

Well, I received my Cricket and carefully assembled it. I will say that they did a great job on this kit. The board is perfect and everything looks great. Anyway, I put a new battery in it, hooked up an antenna and ear buds. Yep, there is sound....but it is a BCB station from Mexico (I think - the broadcast is in Spanish) and it is so loud, I can't hear anything else. I waited until late last night and tried but there were more BCB stations heard. It is totally useless as it is unless I want to listen to a Spanish BCB station. They sound great. Any thoughts or suggestions? Anyone else have issues like this?


I think it transmits fine. My tuner shows power out and I can hear it on another receiver.


Thank you,


Dave, KD9VT

Silvis, IL


Cricket Chirps but...

Dave Belville
 

Well, I received my Cricket and carefully assembled it. I will say that they did a great job on this kit. The board is perfect and everything looks great. Anyway, I put a new battery in it, hooked up an antenna and ear buds. Yep, there is sound....but it is a BCB station from Mexico (I think - the broadcast is in Spanish) and it is so loud, I can't hear anything else. I waited until late last night and tried but there were more BCB stations heard. It is totally useless as it is unless I want to listen to a Spanish BCB station. They sound great. Any thoughts or suggestions? Anyone else have issues like this?


I think it transmits fine. My tuner shows power out and I can hear it on another receiver.


Thank you,


Dave, KD9VT

Silvis, IL


SSS is coming up

John Lonigro
 

This Sunday is the monthly 4SQRP Second Sunday Sprint. It is also Mother's Day. Please don't forget either one. I suspect most Mother's Day's festivities will be over by 7:00 pm CDT.

72,

John, AA0VE
4SQRP Contest Coordinator


Re: 4SQRP News!

kb4qqj
 

Amazon Smiles?? Designate 4sQRP as your choice for donations when you purchase on Amazon. 
 
 
Randy
 
 

In a message dated 5/7/2017 12:51:12 P.M. Eastern Daylight Time, 4sqrp@... writes:
 

GM All,

Several months ago Four State QRP Group submitted an application to the IRS for recognition as a 501(c)(3) non-profit.  We have received approval from the IRS and are now designated as a 501(c)(3) organization, retroactive to May 2013.  As a result, any past and future donations to our organization are now tax deductible. 

The 4SQRP Board of Directors is currently having planning conversations as to how this designation can provide benefits to 4SQRP, its members and the people who purchase our kits.  We believe this new designation will help us ensure OzarkCon will continue for many year to come as a viable, robust QRP conference.

72, 73 de Ron - AG1P

Secreta ry

Four States QRP Group


4SQRP News!

AG1P Ron
 

GM All,

 

Several months ago Four State QRP Group submitted an application to the IRS for recognition as a 501(c)(3) non-profit.  We have received approval from the IRS and are now designated as a 501(c)(3) organization, retroactive to May 2013.  As a result, any past and future donations to our organization are now tax deductible. 

 

The 4SQRP Board of Directors is currently having planning conversations as to how this designation can provide benefits to 4SQRP, its members and the people who purchase our kits.  We believe this new designation will help us ensure OzarkCon will continue for many year to come as a viable, robust QRP conference.

 

72, 73 de Ron - AG1P

Secretary

Four States QRP Group

 

 


DXERS UNLIMITED'S SCRIPT HIGHLIGHTING QRP OPERATION AND MINIMALIST SIMPLE TRANSCEIVERS

Prof. Arnaldo Coro Antich
 

Radio Havana Cuba
Dxers Unlimited weekend edition for Sunday 7 May 2017
By Arnie Coro
radio amateur CO2KK

Hola mis amigos radioaficionados that are now listening to the weekend edition of Dxers Unlimited...I am Arnaldo, Arnie, Coro radio amateur CO2KK, your host here at the one and only radio hobby program on the air and on the web providing coverage to every one of the more than 90 ways of enjoying this wonderful hobby....RADIO. A quick check shows that more and more radio amateurs are using sophisticated digital communications modes that require the use of really high performance computers... Other ham operators that run older machines still have the option to use the easy digital mode... PSK31 and its higher speed versions like PSK63 and PSK125... and here is today's program first topic...Radio amateurs in the Caribbean region, Central America, Mexico and the Southern United States are getting ready to deal with the upcoming Tropical Hurricane Season, due to start on the first day of June, although this year a very rare tropical cyclone developed out of season, surprising scientists that carefully tracked the storm... So far I have not heard about the season's forecast that is published every year ahead of the start of the six months long period that spans from the first of June to the end of November... Preparations for providing emergency communications is at the top of the list of activities by Cuban radio clubs .
Item two: Amazing two way amateur radio contacts on the 80 and 40 meters bands are happening almost every day while using power outputs into the antennas of one Watt of even less. Minimalist transceivers that use the output power transistor as the receiver input product detector have shown that when propagation conditions are normal or above normal, two way contacts can be made using such low power rigs that follow the design criteria of the minimalist PIXIE transceivers . Si amigos, yes my friends, a low parts count little transmit and receive capable home assembled rig when connected to an efficient antenna will be able to establish long distance contacts ...
Item three: Answering a question sent by listeners from Australia... that wanted to know more about the DRM Digital Radio Mondiale system... Yes amigos, it is exactly what is happening, what continues stop to a standstill the introduction of DRM is certainly be the lack of low and medium cost receivers capable of picking up DRM signals And yes, we have confirmed from two independent source that about an integrated circuit capable of demodulating all possible transmission modes, including standard AM, FM, and several of the already on the air digital radio modes, like DRM, the IBOC or HD Radio and all different DAB modes....is expected to the licensed for production by several IC manufacturers . As expected massive production of this new digital integrated circuit that automatically detects the modulation mode in use , producing clear audio output, could be the much needed breakthrough every one is expecting in order to introduce the most efficient digital modes at a worldwide scale....
Now from Dxers Unlimited's weekend edition... a short form solar activity update.... The Sun is once again going through another period of very low activity, but for the past several days we have seen sunspots every day...
Each of the weekly solar and geomagnetic indicators that are tracked were lower this week. Average daily sunspot number dropped 10.6 points to 25.1, and average daily solar flux was 4.5 points lower than the previous week at 76.9.
It is comforting to see though that we have not witnessed a day with 0 sunspots since April 17. Average planetary and mid-latitude A index were both 5.6, down from the previous week which had planetary A index at 26.4 and mid-latitude at 18.4. The A index is expected to remain quiet until May 17-20.
Stand by now for a few seconds as we go to a break for a station ID. I am Arnie Coro in La Habana Cuba

short musical intercut

This is Radio Havana Cuba, the name of the show is Dxers Unlimited, and yes amigos we are very proud of having helped many short wave listeners around the world learn about the existence of amateur radio, leading the way for many of them to now own and operate their own amateur radio service stations to communicate across town on two meters or half way around the world on the most used DX band... 20 meters.... By the way, I enjoy a lot calling CQ DX on 14 060 kiloHertz using slow speed hand sent Morse Code Radiotelegraphy while running 5 Watts or less into a wire antenna that was made from recycled wire coming from a burnt out power transformer primary winding. The three insulators required were made using poliethilene flexible garden hose stock of three quarters of an inch diameter.... That is a low cost antenna by all comparisons... because it is fed using a two wires balanced transmission line also made from the same recycled wire and insulators for the ladder type feed line cut from the same length of poliethilene garden hose. As I have said it here many times.... amateur radio need not be an expensive hobby at all, and my dipole antenna is just another example... It is cut as a full size 60 meters band half wave dipole, and tunes easily from 80 meters all the way up to the 10 meters band, and let me add that using a second antenna tuner especially made for the six meters band the antenna works nicely on the 50 megaHertz band too...
5 watts CW on the 20 meters QRP calling frequency 14060 kiloHertz has made possible contacts as far away as New Zealand under good propagation conditions, and as expected many replies to my CQ calls from CO2KK are received from the first skip zone of 20 meters that spans for around two to three thousand kilometers away from La Habana, Cuba where my station is located. Whenever very short skip is present on 20 meters , I just move to the six meters band and start calling CQ DX, because the very short skip on 20 meters is a very good indicator of possible sporadic E openings on six meters. Let me insist on something said earlier this week....Amateur radio operators having stations capable of operating on the 10 and 6 meter bands will be able to make many DX contacts on those two bands during the summer Sporadic E season that is now starting... But.... the real challenge brought by Sporadic E layer events is that so far they have proven to be impossible to predict... there is no known forecasting method that can tell in advance when one of such super density sporadic E layer patches starts suddenly bringing in DX signals for periods as short as a few minutes or maybe even hours and then suddenly just vanish...And let me also insist on the fact that for 6 meters band operators the sporadic E events make possible working DX stations several hundreds of miles away, with the first skip zone area coming after a zone of no signals... There is also the possibility of double and triple hop skip signals when two or three patches of high density sporadic E clouds align themselves properly...
And now at the end of the program here is our propagation update and forecast for the next several days--- solar activity still at very low levels, just a few weak sunspots active regions in sight Saturday morning local time here in Havana.... 14 hours UTC... when I was typing the script of this program you are listening to right now. Be on the look out for more sporadic E openings... it is now clear that the late spring and summer E skip season is well under way...AMIGOS please don't forget to set aside a little time to send me a signal report and your most appreciated comments and radio hobby related questions to Dxers Unlimited. Send mail to inforhc at enet dot cu ... Via Air Mail to Arnie Coro, Radio Havana Cuba, Havana , Cuba


Re: Speaking of nets... Thursday morning net?

W0IIT
 

Wayne,

The Thursday morning net went dark almost a year ago. I miss it and wish someone would step up to call that net. I would volunteer, however, in my present condx of recovery from an operation to give me an colostomy and learning to live with that device, I fear I might have to miss too many of them due to doctor appointments.

If your query doesn’t turn up another volunteer I might be in favor of giving it a go. I must do something to get back into making contacts. I haven’t had my rig fired up in some time. I might also have to twist some arms to talk someone into doing a bit of antenna work to get a good 40 meter antenna working.

If I call the net I would like to keep with the day and time as before.

cu es 72, Bart W0IIT
Pittsburg, KS


Re: A simple PVC PIPE audio filter for the Cricket

Johnny AC0BQ
 

Here is a link to the author's article that did the write up  on the resonant speaker for QST.
I found it on Google.
Very simple and easy to build.
72
Johnny AC0BQ 


On Fri, May 5, 2017 at 4:08 PM 'Sam Neal' n5af@... [4sqrp] <4sqrp@...> wrote:
 

Hello,

Where can I find a " hopefully virgin " cuspidor/spittoon at? It adds class to
the appearance of the housing of this speaker.



Sam Neal N5AF
Celebrating 60 Years In Amateur Radio
_____________________________________________

------ Original Message ------
Received: Fri, 05 May 2017 03:40:11 PM CDT
From: Charles Powell <doctorcwp@...>



To: 4sqrp@..., Sam Neal <n5af@...>
Subject: Re: [4sqrp] A simple PVC PIPE audio filter for the Cricket

I made a pair of these Dixie Cup resonant speakers today. Remarkably, they
have a very sharp peak at 600 Hz (my preferred center frequency). I opened up
the filter on the KX3 and found that the speakers were better than tightening
down the filter on the radio. It is the equivalent of about a 100 Hz filter,
but much better sonic quality. I am impressed! Now I have extra Dixie cups
for summer as well. (I made two because the KX3 needs “stereo” to work
“Dual Watch” mode.

One suggestion that was not shown in the YouTube video: After attaching the
speaker to the cup, place another cup underneath it, up against the bottom of
the speaker, and hot glue it in place. I found this narrows the bandwidth
considerably, and fortunately at just the right frequency (for me, anyway).

72,

Charles - NK8O

> On May 3, 2017, at 9:22 PM, 'Sam Neal' n5af@... [4sqrp]
<4sqrp@...> wrote:
>
> Hello,
>
> I made it's el-cheapo little brother ( some old issue of Popular Electronics
)
> out of a Pringles potato chip can and the speaker out of an old CB radio.
That
> sounded very good, so I can imagine that it's big brother from QST will be
> much better.
>
> 73,
>
> Sam Neal N5AF
> Celebrating 60 Years In Amateur Radio
> _______________________________________________________
>
> ------ Original Message ------
> Received: Wed, 03 May 2017 05:36:31 PM CDT

> From: "Charles Moizeau w2sh@... w2sh@...> [4sqrp]"
<4sqrp@... 4sqrp@...>>
> To: "4sqrp@... 4sqrp@...>"
<4sqrp@... 4sqrp@...>>, "wa0itp@...
wa0itp@...>"
> <wa0itp@... wa0itp@...>>
> Subject: Re: [4sqrp] A simple PVC PIPE audio filter for the Cricket
>
> By all means have a look at the February 2017 issue of QST, pages 43-45, "A
> Resonant Speaker for CW", for good ideas and a nicely crafted result.
>
> 72,
>
> Charles, W2SH
>

> From: 4sqrp@... 4sqrp@...>
<4sqrp@... 4sqrp@...>> on behalf of WA0ITP
> wa0itp@... wa0itp@...> [4sqrp] <4sqrp@...
4sqrp@...>>


>
> Sent: Wednesday, May 3, 2017 3:10 PM

> To: 4sqrp@... 4sqrp@...>; Charles Powell;


Walter - K5EST
> Subject: Re: [4sqrp] A simple PVC PIPE audio filter for the Cricket
>
> Lets build one!
>
> A hunk of pvc pipe works very well, and is plenty stiff enough. I built one
> some years back, and if I could find it, I'd use it. The volume of the pipe
> doesn't matter, only the length, so I'll let the size of the junk box
speaker
> dictate the diameter of the pipe. Easy calculation too, length of
> pipe=1100/2f. Think I'll build one specifically for the Cricket, but it
will
> need a little outboard amp (tape it to the filter) to drive the speaker.
This
> thing could be built similar to a trombone, so I may include a sliding
insert
> (or an outside tube) that changes the resonant freq from abt 800 cycles
(8.5")
> down to 400cycles (16.5"). It will work for any rig that will drive a
> speaker.
>
> I'm off to the junque box to find a speaker, anyone else want to build one
> too? Anyone have some good construction hints?
>
> 72 WAØITP
> I love this radio stuff.


<http://www.wa0itp.com/>>
>
> WAŘITP Home - Promoting QRP operating and


> Welcome To WAØITP's Ham Radio Web Site Promoting QRP operating and
> Construction. Pacific Mountain Central Eastern GMT
>
> On 5/3/2017 12:44 PM, Charles Powell

> doctorcwp@... doctorcwp@...>doctorcwp@...


doctorcwp@...>> [4sqrp] wrote:
>
> I had forgotten about this. I made one years ago when I first started in
> radio, and used it with my FT-101EE. As i recall, it worked quite well and
> the video bears this out. I have a boatload of small speakers around here
> somewhere. I made a tuned speaker from PVC that also works very well -
almost
> as well as the filters on my K2.
>
> 72,
>
> Charles
> NK8O
>
> On May 3, 2017, at 12:34 PM, Walter - K5EST
> walter.k5est@...

walter.k5est@...>walter.k5est@...
walter.k5est@...>> [4sqrp]
> <4sqrp@...
4sqrp@...>4sqrp@...


4sqrp@...>>> wrote:
>
> Keeping in the minimalist fashion, my old friend the Red Solo Cup Resonance
CW
> filter does a great job at nearly no expense. The design has been around for
a
> long time. The URL is to a U-Tube video.
>
> https://www.youtube.com/watch?v=XN8FUr0m1Po
<https://www.youtube.com/watch?v=XN8FUr0m1Po>
>
> or if can get away with a scavenger hunt in the kitchen.....
>
> https://www.youtube.com/watch?v=2_giOx8SNnY&t=134s
<https://www.youtube.com/watch?v=2_giOx8SNnY&t=134s>
>
> Happy CWing........de... Walter - K5EST
>
>
>

--
Check out the 4SQRP website at 4sqrp.com


Re: Cricket Parts Alert

John Daly
 

Gary:

I believe I was one, I received the two washer that fit under the Morse key but only had one smaller aluminum spacer in my kit. So if you could mail me one or advise that would be great. Are the two aluminum spacers used with the optional plug to the external key? Just curious. Build the kit with my 13 year old grandson. Great first kit for him.

73 - John

John L. Daly w4usf
1539 Coppersmith Ct.
Lutz, FL 33559

Thanks, John

Sent from my iPad

On May 4, 2017, at 9:27 AM, gary.w0gx@... [4sqrp] <4sqrp@...> wrote:

 

I've received recent reports that at least some kits were shipped with one part missing: only 1 small aluminum spacer vs the 2 required.

I've been packaging kits in batches of 25 with individual inventories for each kit. However, it appears that some kits were missing that one part (and I've discovered the root cause). Unfortunately, I do not know how many kits were affected.

If you are one of the unfortunate kitters missing the part please contact me and I will mail it to you the same day. The email address, and my call, are on the Cricket kit page and my signature line below

72,
Gary/w0gx
CricketMaster
4sqrpcricket@...





Case for my Cricket

Jim Sheldon
 

Hi Gang,
I went to Home Depot and picked up some Poplar trim wood they have in 4"
X 1/4" X 2' pieces and used that to frame up the inside of the box a
bit. The one I saw in Branson had the Cricket right up on the front edge
so he had to inlet the cover to clear the earphone jack and part of the
key knob. Using some of the 1/4" thick Poplar, I set a shelf back by
1/4" from the front of the box and cut it the exact length of the front
of the Cricket's PC board. I mounted another piece flush with the right
side of the Cricket's PC board and rather than glue them, I drilled &
screwed them in place using #2 X 1/2" brass countersunk wood screws. I
removed the stick-on rubber feet from the Cricket and using another
piece of the 1/4" Poplar, made a support that fit flush with the back
edge of the Cricket's PC board. Once I had these made up, I carefully
drilled 1/8" holes right in the 4 corners of the Cricket's PC board just
back of the black border line. For easier measuring, I mounted the back
support to the Cricket (I had to carefully inlet the inner side to clear
the built-in keys rear nut plus some of the soldered bumps for
components along underside of the rear including the battery holder and
BNC connector connections. I actually stole the round head mounting
screws that originally held the handle on the box to mount the cricket
to it's supports and replace those with some nice brass wood screws that
were a little larger in diameter than the originals to make for a better
fit on the handle. There is a compartment on the right side that will
hold my small hand key and extra 9 volt batteries (be sure and put them
in insulated bags so you don't short them out) and another compartment
at the rear of the Cricket that will hold cables and more 9 volt
batteries (Can't never have too many 9 volt batteries with a Cricket -
LOL).

I haven't stained the box yet, but that comes next - I've posted the
pictures in the 4SQRP "Cricket" group if anyone wants to see just what
I'm talking about.

Jim - W0EB


Re: A simple PVC PIPE audio filter for the Cricket

Sam Neal
 

Hello,

Where can I find a " hopefully virgin " cuspidor/spittoon at? It adds class to
the appearance of the housing of this speaker.

Sam Neal N5AF
Celebrating 60 Years In Amateur Radio
_____________________________________________

------ Original Message ------
Received: Fri, 05 May 2017 03:40:11 PM CDT
From: Charles Powell <doctorcwp@yahoo.com>
To: 4sqrp@yahoogroups.com, Sam Neal <n5af@usa.net>
Subject: Re: [4sqrp] A simple PVC PIPE audio filter for the Cricket

I made a pair of these Dixie Cup resonant speakers today. Remarkably, they
have a very sharp peak at 600 Hz (my preferred center frequency). I opened up
the filter on the KX3 and found that the speakers were better than tightening
down the filter on the radio. It is the equivalent of about a 100 Hz filter,
but much better sonic quality. I am impressed! Now I have extra Dixie cups
for summer as well. (I made two because the KX3 needs “stereo” to work
“Dual Watch” mode.

One suggestion that was not shown in the YouTube video: After attaching the
speaker to the cup, place another cup underneath it, up against the bottom of
the speaker, and hot glue it in place. I found this narrows the bandwidth
considerably, and fortunately at just the right frequency (for me, anyway).

72,

Charles - NK8O


On May 3, 2017, at 9:22 PM, 'Sam Neal' n5af@usa.net [4sqrp]
<4sqrp@yahoogroups.com> wrote:

Hello,

I made it's el-cheapo little brother ( some old issue of Popular Electronics
)
out of a Pringles potato chip can and the speaker out of an old CB radio.
That
sounded very good, so I can imagine that it's big brother from QST will be
much better.

73,

Sam Neal N5AF
Celebrating 60 Years In Amateur Radio
_______________________________________________________

------ Original Message ------
Received: Wed, 03 May 2017 05:36:31 PM CDT
From: "Charles Moizeau w2sh@msn.com <mailto:w2sh@msn.com> [4sqrp]"
<4sqrp@yahoogroups.com <mailto:4sqrp@yahoogroups.com>>
To: "4sqrp@yahoogroups.com <mailto:4sqrp@yahoogroups.com>"
<4sqrp@yahoogroups.com <mailto:4sqrp@yahoogroups.com>>, "wa0itp@mchsi.com
<mailto:wa0itp@mchsi.com>"
<wa0itp@mchsi.com <mailto:wa0itp@mchsi.com>>
Subject: Re: [4sqrp] A simple PVC PIPE audio filter for the Cricket

By all means have a look at the February 2017 issue of QST, pages 43-45, "A
Resonant Speaker for CW", for good ideas and a nicely crafted result.

72,

Charles, W2SH

From: 4sqrp@yahoogroups.com <mailto:4sqrp@yahoogroups.com>
<4sqrp@yahoogroups.com <mailto:4sqrp@yahoogroups.com>> on behalf of WA0ITP
wa0itp@mchsi.com <mailto:wa0itp@mchsi.com> [4sqrp] <4sqrp@yahoogroups.com
<mailto:4sqrp@yahoogroups.com>>

Sent: Wednesday, May 3, 2017 3:10 PM
To: 4sqrp@yahoogroups.com <mailto:4sqrp@yahoogroups.com>; Charles Powell;
Walter - K5EST
Subject: Re: [4sqrp] A simple PVC PIPE audio filter for the Cricket

Lets build one!

A hunk of pvc pipe works very well, and is plenty stiff enough. I built one
some years back, and if I could find it, I'd use it. The volume of the pipe
doesn't matter, only the length, so I'll let the size of the junk box
speaker
dictate the diameter of the pipe. Easy calculation too, length of
pipe=1100/2f. Think I'll build one specifically for the Cricket, but it
will
need a little outboard amp (tape it to the filter) to drive the speaker.
This
thing could be built similar to a trombone, so I may include a sliding
insert
(or an outside tube) that changes the resonant freq from abt 800 cycles
(8.5")
down to 400cycles (16.5"). It will work for any rig that will drive a
speaker.

I'm off to the junque box to find a speaker, anyone else want to build one
too? Anyone have some good construction hints?

72 WAØITP
I love this radio stuff.
www.wa0itp.com <http://www.wa0itp.com/><http://www.wa0itp.com
<http://www.wa0itp.com/>>
www.4sqrp.com <http://www.4sqrp.com/><http://www.4sqrp.com
<http://www.4sqrp.com/>>

[http://www.wa0itp.com/w8dizcntr2.jpg
<http://www.wa0itp.com/w8dizcntr2.jpg>]<http://www.wa0itp.com/
<http://www.wa0itp.com/>>

WAŘITP Home - Promoting QRP operating and
Construction.<http://www.wa0itp.com/ <http://www.wa0itp.com/>>
www.wa0itp.com <http://www.wa0itp.com/>
Welcome To WAØITP's Ham Radio Web Site Promoting QRP operating and
Construction. Pacific Mountain Central Eastern GMT

On 5/3/2017 12:44 PM, Charles Powell
doctorcwp@yahoo.com <mailto:doctorcwp@yahoo.com><mailto:doctorcwp@yahoo.com
<mailto:doctorcwp@yahoo.com>> [4sqrp] wrote:

I had forgotten about this. I made one years ago when I first started in
radio, and used it with my FT-101EE. As i recall, it worked quite well and
the video bears this out. I have a boatload of small speakers around here
somewhere. I made a tuned speaker from PVC that also works very well -
almost
as well as the filters on my K2.

72,

Charles
NK8O

On May 3, 2017, at 12:34 PM, Walter - K5EST
walter.k5est@gmail.com
<mailto:walter.k5est@gmail.com><mailto:walter.k5est@gmail.com
<mailto:walter.k5est@gmail.com>> [4sqrp]
<4sqrp@yahoogroups.com
<mailto:4sqrp@yahoogroups.com><mailto:4sqrp@yahoogroups.com
<mailto:4sqrp@yahoogroups.com>>> wrote:

Keeping in the minimalist fashion, my old friend the Red Solo Cup Resonance
CW
filter does a great job at nearly no expense. The design has been around for
a
long time. The URL is to a U-Tube video.

https://www.youtube.com/watch?v=XN8FUr0m1Po
<https://www.youtube.com/watch?v=XN8FUr0m1Po>

or if can get away with a scavenger hunt in the kitchen.....

https://www.youtube.com/watch?v=2_giOx8SNnY&t=134s
<https://www.youtube.com/watch?v=2_giOx8SNnY&t=134s>

Happy CWing........de... Walter - K5EST



Re: A simple PVC PIPE audio filter for the Cricket

Charles W. Powell
 

I made a pair of these Dixie Cup resonant speakers today.  Remarkably, they have a very sharp peak at 600 Hz (my preferred center frequency).  I opened up the filter on the KX3 and found that the speakers were better than tightening down the filter on the radio.  It is the equivalent of about a 100 Hz filter, but much better sonic quality.  I am impressed!  Now I have extra Dixie cups for summer as well. (I made two because the KX3 needs “stereo” to work “Dual Watch” mode.

One suggestion that was not shown in the YouTube video: After attaching the speaker to the cup, place another cup underneath it, up against the bottom of the speaker, and hot glue it in place.  I found this narrows the bandwidth considerably, and fortunately at just the right frequency (for me, anyway).

72,

Charles - NK8O


On May 3, 2017, at 9:22 PM, 'Sam Neal' n5af@... [4sqrp] <4sqrp@...> wrote:

Hello,

I made it's el-cheapo little brother ( some old issue of Popular Electronics )
out of a Pringles potato chip can and the speaker out of an old CB radio. That
sounded very good, so I can imagine that it's big brother from QST will be
much better.

73,

Sam Neal N5AF
Celebrating 60 Years In Amateur Radio
_______________________________________________________

------ Original Message ------
Received: Wed, 03 May 2017 05:36:31 PM CDT
From: "Charles Moizeau w2sh@... [4sqrp]" <4sqrp@...>
To: "4sqrp@..." <4sqrp@...>, "wa0itp@..."
<wa0itp@...>
Subject: Re: [4sqrp] A simple PVC PIPE audio filter for the Cricket

By all means have a look at the February 2017 issue of QST, pages 43-45, "A
Resonant Speaker for CW", for good ideas and a nicely crafted result.

72,

Charles, W2SH

From: 4sqrp@... <4sqrp@...> on behalf of WA0ITP
wa0itp@... [4sqrp] <4sqrp@...>

Sent: Wednesday, May 3, 2017 3:10 PM
To: 4sqrp@...; Charles Powell; Walter - K5EST
Subject: Re: [4sqrp] A simple PVC PIPE audio filter for the Cricket

Lets build one!

A hunk of pvc pipe works very well, and is plenty stiff enough. I built one
some years back, and if I could find it, I'd use it. The volume of the pipe
doesn't matter, only the length, so I'll let the size of the junk box speaker
dictate the diameter of the pipe. Easy calculation too, length of
pipe=1100/2f. Think I'll build one specifically for the Cricket, but it will
need a little outboard amp (tape it to the filter) to drive the speaker. This
thing could be built similar to a trombone, so I may include a sliding insert
(or an outside tube) that changes the resonant freq from abt 800 cycles (8.5")
down to 400cycles (16.5"). It will work for any rig that will drive a
speaker.

I'm off to the junque box to find a speaker, anyone else want to build one
too? Anyone have some good construction hints?

72 WAØITP
I love this radio stuff.
www.wa0itp.com<http://www.wa0itp.com>
www.4sqrp.com<http://www.4sqrp.com>

[http://www.wa0itp.com/w8dizcntr2.jpg]<http://www.wa0itp.com/>

WAŘITP Home - Promoting QRP operating and
Construction.<http://www.wa0itp.com/>
www.wa0itp.com
Welcome To WAØITP's Ham Radio Web Site Promoting QRP operating and
Construction. Pacific Mountain Central Eastern GMT

On 5/3/2017 12:44 PM, Charles Powell
doctorcwp@...<mailto:doctorcwp@...> [4sqrp] wrote:

I had forgotten about this. I made one years ago when I first started in
radio, and used it with my FT-101EE. As i recall, it worked quite well and
the video bears this out. I have a boatload of small speakers around here
somewhere. I made a tuned speaker from PVC that also works very well - almost
as well as the filters on my K2.

72,

Charles
NK8O

On May 3, 2017, at 12:34 PM, Walter - K5EST
walter.k5est@...<mailto:walter.k5est@...> [4sqrp]
<4sqrp@...<mailto:4sqrp@...>> wrote:

Keeping in the minimalist fashion, my old friend the Red Solo Cup Resonance CW
filter does a great job at nearly no expense. The design has been around for a
long time. The URL is to a U-Tube video.

https://www.youtube.com/watch?v=XN8FUr0m1Po

or if can get away with a scavenger hunt in the kitchen.....

https://www.youtube.com/watch?v=2_giOx8SNnY&t=134s

Happy CWing........de... Walter - K5EST



Re: 3560 Crystals from eBay

Mike WA8BXN
 

I don't have a cricket yet (its on order). I put together the oscillator on a test board here to try out some crystals I had. To simulate the load of the final, I used a 10K resistor to ground. I first tried out a number of 3579 crystals of various sizes and could hear all of them in my test receiver and keying sounded good. I then tried a few 3560 crystals of various sizes and could not hear any of the oscillating until I tuned the test receiver down to that frequency.Keying sounded good.  The crystals I used for testing came from a variety of sources including e-bay. 

My plan was to try some different feedback capacitor values if I had some that didn't work, but since they all do I can't. My short test here suggests that other 80 meter rocks should work for the most part. 

73/72 - Mike WA8BXN

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