Date   

Re: Cricket on 3580

Jim Sheldon
 

I heard you on my Cricket Terry, but I don't have a really good antenna
on 80. I'm forced to use my 40-20-10 PAR EndFedZ as a 1/4 wave on 80.
I can tune it to a low SWR and the Cricket hears ok, but even running it
at 10 volts and right at 1 watt out, you weren't hearing me. I need to
get a WAHR up dedicated to 80/40 QRP. It's just too much hassle to pull
the antenna off the K line. Not easy to get behind the operating desk
right now - LOL.

I'm using one of N5IB's voltage regulator/current limiter boards to
power the cricket from my big 12.6 volt battery. The regulator is
variable and I've tried the Cricket all the way up to 12.0 volts. At 12
volts, the 2N7000 PA heats up pretty quickly, so rather than kill it, I
dropped the voltage back to 9.5. It puts out .9 to 1 watt, the PA stays
within temperature limits (won't burn fingers even at 1 minute key
down). The PA current is about 190ma on 9.5 volts with the 2N7000. I
am going to try a BS170 one of these days and see if I can get it to
work on 12.6 volts (might have to heat sink the PA) and then I won't
need the regulator. I actually have a little 35 watt amplifier I just
built but I don't have the plug-in LP filter for 80/75 meters or I'd
have an "Alpha" Cricket on the air - LOL.

Jim - W0EB

------ Original Message ------
From: "WA0ITP wa0itp@mchsi.com [4sqrp]" <4sqrp@yahoogroups.com>
To: "4sqrp@yahoogroups.com" <4sqrp@yahoogroups.com>
Sent: 5/2/2017 7:41:16 PM
Subject: [4sqrp] Cricket on 3580

A lonely Cricket is calling CQ on 3580

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



------------------------------------
Posted by: WA0ITP <wa0itp@mchsi.com>
------------------------------------

4SQRP Website: http://4sqrp.com
Plan to attend OzarkCon on - April 6-7, 2018
View Details at http://www.ozarkcon.com/index.php
------------------------------------

Yahoo Groups Links



Re: Kit Idea

Walter - K5EST
 

Nice idea and it is in the notes with your name as credit!

Thank you, Sean, no promises but the idea will be discussed.

72....Walter . K5EST



On Tuesday, May 2, 2017, Sean Edwards cybersean3000@... [4sqrp] <4sqrp@...> wrote:
 

At Ozarkcon, Tommy Henderson WD5AGO, ended his informative and entertaining presentation with the announcement of a 17 meter kit. Then after Dave Cripe's NM0S new kit show and tell, he asked for ideas. I have finally thought about it.

For quite some time, I have been looking for a three band kit, specifically for the WARC bands of 30, 17 and 12 meters. I am aware of Weber's Tri Bander kit, but that can only go to 15m, not 12m.

So that is my suggestion, a kit to cover the 3 WARC bands.

-= Sean Edwards =-
AD0QG


Cricket on 3580

WA0ITP
 

A lonely Cricket is calling CQ on 3580

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


Re: What's Up with the Cricket Photo Page?

WA0ITP
 

Hi Rocky,

I have just a few more pictures to upload, but nothing more revealing than what's there.  At that time I'll delete the blank links that are left over from a previous photopage.

72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com
On 5/2/2017 5:08 PM, pkfspo2fvm3t4okbh2yd3tkzw6bblzcdrjoscwip@... [4sqrp] wrote:

 

When I access the cricket photo page there are only 4 or 5 pics loading...all the rest are blank and if I click on them I get routed to a page that says

Error 404: NOT FOUND!


Eager to see the other pics before I get started...




Cricket is Chirping!

Jim Sheldon
 

On 3.57969 right now, calling CQ with my Cricket and a Bug - some of you
saw the HazMat bug at OzarkCon. If you work me you can hear it. If
it's too fast, I have a hand key very close by. I'm also using one of
N5IB's current limiter/Voltage Regulator boards dropping my 12.6 volt 9
amp hour battery down to 9 volts for the Cricket - I won't run out of
battery power for a week or so - Hi Hi.

Jim - W0EB


Re: What's Up with the Cricket Photo Page?

Tim N9PUZ
 

Rocky,

It appears that the "non-working" images may be placeholders from a template page used by various kits. The author, unknown to me, probably just forgot to remove them after they added the photos for the Cricket.

If this is the worst thing that happens to us today it was a good day, IMO.

Tim N9PUZ
4SQRP List Moderator

On 5/2/2017 5:08 PM, pkfspo2fvm3t4okbh2yd3tkzw6bblzcdrjoscwip@yahoo.com [4sqrp] wrote:
When I access the cricket photo page there are only 4 or 5 pics loading...all the rest are blank and if I click on them I get routed to a page that says
Error 404: NOT FOUND!
Eager to see the other pics before I get started...
------------------------------------------------------------------------
Posted by: pkfspo2fvm3t4okbh2yd3tkzw6bblzcdrjoscwip@yahoo.com
------------------------------------------------------------------------


What's Up with the Cricket Photo Page?

pkfspo2fvm3t4okbh2yd3tkzw6bblzcdrjoscwip@...
 

When I access the cricket photo page there are only 4 or 5 pics loading...all the rest are blank and if I click on them I get routed to a page that says
Error 404: NOT FOUND!


Eager to see the other pics before I get started...



Kit Idea

Sean Edwards
 

At Ozarkcon, Tommy Henderson WD5AGO, ended his informative and entertaining presentation with the announcement of a 17 meter kit. Then after Dave Cripe's NM0S new kit show and tell, he asked for ideas. I have finally thought about it.

For quite some time, I have been looking for a three band kit, specifically for the WARC bands of 30, 17 and 12 meters. I am aware of Weber's Tri Bander kit, but that can only go to 15m, not 12m.

So that is my suggestion, a kit to cover the 3 WARC bands.

-= Sean Edwards =-
AD0QG


Re: Another Cricket lives`

Jim Sheldon
 

Well, I got wrapped up in building another project - this one is a bit
more time critical and the assembly manual was total junk! It's the
Mini HFPA 30 watt amplifier from HF Projects. The case/parts quality is
first rate and the circuit looks like it will be a good one but the
manual they sent me (via email) is missing about 10 critical steps and
they are the ones that if you screw them up, the $350 amp blows up in
your face! I found a whole bunch of bad component labeling on the PC
board VS the manual and have expressed my extreme displeasure with their
quality control on the manual! I'd have had the Cricket on tonight if I
hadn't gotten so wrapped up in the amplifier project. (I know, it ain't
QRP but the way 40 has been lately, I'm taking it along for insurance
when we head for Louisiana to visit family around the first of July.

Jim - W0EB

------ Original Message ------
From: "'Jim Sheldon' w0eb@cox.net [4sqrp]" <4sqrp@yahoogroups.com>
To: "4SQRP Mailing List" <4sqrp@yahoogroups.com>
Sent: 5/1/2017 2:38:38 PM
Subject: [4sqrp] Another Cricket lives`

Finally got my cricket in the mail this morning.


Listening for crickets

Paul Smith
 

Im at 3579 and up listening and calling any crickets out there?

de Paul N0NBD


Sent from Outlook


Re: Another Cricket lives`

Paul Smith
 

Sounds like a good plan Tom,

de Paul


Sent from Outlook




From: 4sqrp@... <4sqrp@...> on behalf of Tom Sevart tmsevart@... [4sqrp] <4sqrp@...>
Sent: Tuesday, May 2, 2017 2:12 AM
To: 4sqrp@...
Subject: Re: [4sqrp] Another Cricket lives`
 
 

On 05/01/17 14:38, 'Jim Sheldon' w0eb@... [4sqrp] wrote:

> I saw a real nice Cricket install in one of the small Hobby Lobby boxes
> done in the manner we put the Bayou Jumpers into the big hobby lobby
> box. He had it set in the lower right corner of that box and had to
> chop out a bit of the cover wood to clear the key knob. I'm left
> handed, so I'll put it in the back left of the box in the same way I did
> my Bayou Jumper and everything will clear just fine - I'll also make
> sure it sets about a 1/16th of an inch below the edges. Pix of that
> later after I get my new set of boxes in from Hobby Lobby.
>

I saw that and thought it was a neat idea. I bought a small wooden box
from Amazon
(https://www.amazon.com/gp/product/B0085TG246/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1)
which is a bit smaller than the Hobby Lobby box, but big enough to mount
the radio with a bit of room left over to hold spare batteries, extra
crystals, and a set of ear buds.

I did notice that you can't mount the Cricket PC board right next to the
edge of the box and close the lid due to the headphone jack & key knob,
so I plan to put the cricket board about 1/8" back from the front of the
box. I've got some leftover floor underlayment we were using for
paneling in a home improvement project I can use to box in underneath
the cricket PC board.

--
Tom Sevart N2UHC
St. Paul, KS

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


Re: Another Cricket lives`

Tom Sevart
 

On 05/01/17 14:38, 'Jim Sheldon' w0eb@cox.net [4sqrp] wrote:

I saw a real nice Cricket install in one of the small Hobby Lobby boxes
done in the manner we put the Bayou Jumpers into the big hobby lobby
box. He had it set in the lower right corner of that box and had to
chop out a bit of the cover wood to clear the key knob. I'm left
handed, so I'll put it in the back left of the box in the same way I did
my Bayou Jumper and everything will clear just fine - I'll also make
sure it sets about a 1/16th of an inch below the edges. Pix of that
later after I get my new set of boxes in from Hobby Lobby.
I saw that and thought it was a neat idea. I bought a small wooden box from Amazon (https://www.amazon.com/gp/product/B0085TG246/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1) which is a bit smaller than the Hobby Lobby box, but big enough to mount the radio with a bit of room left over to hold spare batteries, extra crystals, and a set of ear buds.

I did notice that you can't mount the Cricket PC board right next to the edge of the box and close the lid due to the headphone jack & key knob, so I plan to put the cricket board about 1/8" back from the front of the box. I've got some leftover floor underlayment we were using for paneling in a home improvement project I can use to box in underneath the cricket PC board.


--
Tom Sevart N2UHC
St. Paul, KS


Re: About the new Crickett transceiver

WA0ITP
 

Hello Arnie,

Nice to see your post, and good to hear from you again.  The Cricket information, including the schematic, is here  http://www.4sqrp.com/cricket.php  Please send a direct email to me if we can help you in anyway with your mission to put more hams on 40M.   wa0itp@...

72 es ttul
72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com
On 4/30/2017 12:11 PM, 'Prof. Arnaldo Coro Antich' coro@... [4sqrp] wrote:

 

Dear amigo Curt:

Thanks for your very interesting reply to my request. We have achieved nice results on 40 meters using MOSFET devices recycled from computer UPS power supplies that use them as a square wave power oscillator. The CFL NPN transistors are only good up to 80 meters... as demonstrated by many tests, but they simply do not amplify on 40 meters.

Where I can see the circuit diagaram of the Crickett transceiver ?

Here in Cuba we have now 10,000 radio amateurs with maybe 90 percent of them operating on the 2 meters FM segment between 144.2 and 145.800 and using more than 40 repeaters located all over the country. Many of them want to go on the air on the HF bands, especially on 40 meters that provides very nice daytime coverage all over the NVIS coverage area and make possible to work DX during the evenings. The antenna that is most popular here is the 40 meters inverted V dipole, and some hams are using now delta loops...

73 and DX

Arnie  Coro CO2KK


On 30/04/17 12:26, wb8yyy@... [4sqrp] wrote:
Arnie

certainly a Cricket like rig could be made for 40m.  the main feature of this rig is sharing the PA and receive mixer function - this same idea was implemented by NM0S in the Cyclone transceiver a few years ago.  the key device here is a MOSFET -- amazing these little tiny transistors can make 0.5 watts for a 2N7000 or a few watts for a BS170.  this architecture simplifies receive to transmit switching (QSK) also. 

the rest of the transceiver is rather customary - certainly it could be homebrewed.  yes a simple VFO does make some sense here if it is to be used as a regular QRP rig. 

others have wondered if a much cheaper rig could be made with a smaller PC board, without the cute built-in coils? 

I don't know if any consumer devices feature powdered-iron inductors or tiny MOSFETs - but if they did someone could use them for a QRP rig.  I am not sure if the CFL transistors (NPN) would work well o n 40m,&nb sp;

with lower solar flux at more northern latitudes we are finding 40m to sometimes only be good for 'DX' in the evening - hence our growing use of 80m.  yes Spring and Summer mean QRN - and your latitude is closer to a greater frequency of thunder storm QRM. 

CUL 73

Curt



Another crickit lives

Mike Broga <w9qs@...>
 


Cricket In A Sack

Sam Neal
 

Hello,

My Cricket kit also arrived today, Monday 1 May. Now- to get that pesky 80
meter dipole up!

73,

Sam Neal N5AF
Celebrating 60 Years In Amateur Radio
__________________________________________________________________________
Subject: Re: [4sqrp] Another Cricket lives`

My cricket arrived also.I hope work on it this afternoon.I will look for you
tonight Jim.

Dit Dit

Mike, W9QS
60th year in Ham Radio
First licensed in 1956 as KN6TBP

------ Original Message ------

From: 'Jim Sheldon' w0eb@cox.net [4sqrp]
To: 4SQRP Mailing List
Sent: May 1, 2017 at 2:40 PM
Subject: [4sqrp] Another Cricket lives`


Finally got my cricket in the mail this morning. Took about an hour to
build it including a break for lunch. First thing I did was grab an old
9 volt battery I had laying on the desk (it had powered my MTR5B on and
off for a day or two). I didn't bother to measure the voltage, just
plugged 'er in and hooked the Cricket up to a dummy load through my
YouKits SWR/Wattmeter. Surprise, I got .70 watt out of it into the
Microwave Associates 20 watt dummy load I use for all my QRP rig
testing. OK, I don't have an 80 meter antenna that's easily accessible
without dismantling the Main Elecraft KLine station so I used the MFJ
9201 "Pocket Tuner" and my PAR EndFedZ 40-20-10 figuring it might work
as a 1/4 wave on 80 using the tuner. Wonder of wonders, it did and I
was able to get a 1.08:1 SWR on 3.57969 so I do believe I'm on the air!
Checked the receiver sensitivity using my slightly stingy SARK-110
calibrated signal generator and a good step attenuator the MDS on mine
worked out to be -108 dBm which isn't quite as good as David's specs
say, but again, the SARK-110 may be off and my step attenuator hasn't
seen a cal lab so I'm quite happy with the measurements I got! It hears
well and is very stable.

I built mine with the adapter for an external Key so I could use my
little Bunnell 6B that I put on a 1/2" thick Corian base. They make a
good combo. Just like Tom, N2UHC, until I got the SWR within reason,
the oscillator quit and I got a really chirpy, screaming sidetone. As
soon as the SWR dropped to under 3:1, the oscillator started, I got
output power and the sidetone cleaned right up. It really is a nice
little rig and now I'm going to have to put up a better 80 meter antenna
dedicated to the QRP rigs I have. Probably an inverted L or sloper to
the big Maple tree in the back yard, but the rain is going to have to
stay quit and the wind drop a bit before I do that. Meanwhile, I'll use
the EndFedZ and see if I can make any QSO's with that.

After the initial tests, I put a brand new 9 volt battery on and WOW, a
whole .74 watts into the dummy load and same into the antenna once I got
the SWR to the lowest.

I saw a real nice Cricket install in one of the small Hobby Lobby boxes
done in the manner we put the Bayou Jumpers into the big hobby lobby
box. He had it set in the lower right corner of that box and had to
chop out a bit of the cover wood to clear the key knob. I'm left
handed, so I'll put it in the back left of the box in the same way I did
my Bayou Jumper and everything will clear just fine - I'll also make
sure it sets about a 1/16th of an inch below the edges. Pix of that
later after I get my new set of boxes in from Hobby Lobby.

For now, I'll post pix on the 4 States Cricket group in the photo's
section and will post more pix when I finally get it mounted in the
small HL box.

Jim - W0EB

PS I'll be on 3.57969 around 7-7:30 Central this evening to see if I
can make my first QSO with it. May be on later if conditions aren't
good early on.


Re: Another Cricket lives`

Mike Broga <w9qs@...>
 


Another Cricket lives`

Jim Sheldon
 

Finally got my cricket in the mail this morning. Took about an hour to
build it including a break for lunch. First thing I did was grab an old
9 volt battery I had laying on the desk (it had powered my MTR5B on and
off for a day or two). I didn't bother to measure the voltage, just
plugged 'er in and hooked the Cricket up to a dummy load through my
YouKits SWR/Wattmeter. Surprise, I got .70 watt out of it into the
Microwave Associates 20 watt dummy load I use for all my QRP rig
testing. OK, I don't have an 80 meter antenna that's easily accessible
without dismantling the Main Elecraft KLine station so I used the MFJ
9201 "Pocket Tuner" and my PAR EndFedZ 40-20-10 figuring it might work
as a 1/4 wave on 80 using the tuner. Wonder of wonders, it did and I
was able to get a 1.08:1 SWR on 3.57969 so I do believe I'm on the air!
Checked the receiver sensitivity using my slightly stingy SARK-110
calibrated signal generator and a good step attenuator the MDS on mine
worked out to be -108 dBm which isn't quite as good as David's specs
say, but again, the SARK-110 may be off and my step attenuator hasn't
seen a cal lab so I'm quite happy with the measurements I got! It hears
well and is very stable.

I built mine with the adapter for an external Key so I could use my
little Bunnell 6B that I put on a 1/2" thick Corian base. They make a
good combo. Just like Tom, N2UHC, until I got the SWR within reason,
the oscillator quit and I got a really chirpy, screaming sidetone. As
soon as the SWR dropped to under 3:1, the oscillator started, I got
output power and the sidetone cleaned right up. It really is a nice
little rig and now I'm going to have to put up a better 80 meter antenna
dedicated to the QRP rigs I have. Probably an inverted L or sloper to
the big Maple tree in the back yard, but the rain is going to have to stay quit and the wind drop a bit before I do that. Meanwhile, I'll use
the EndFedZ and see if I can make any QSO's with that.

After the initial tests, I put a brand new 9 volt battery on and WOW, a
whole .74 watts into the dummy load and same into the antenna once I got
the SWR to the lowest.

I saw a real nice Cricket install in one of the small Hobby Lobby boxes
done in the manner we put the Bayou Jumpers into the big hobby lobby
box. He had it set in the lower right corner of that box and had to
chop out a bit of the cover wood to clear the key knob. I'm left
handed, so I'll put it in the back left of the box in the same way I did
my Bayou Jumper and everything will clear just fine - I'll also make
sure it sets about a 1/16th of an inch below the edges. Pix of that
later after I get my new set of boxes in from Hobby Lobby.

For now, I'll post pix on the 4 States Cricket group in the photo's
section and will post more pix when I finally get it mounted in the
small HL box.

Jim - W0EB

PS I'll be on 3.57969 around 7-7:30 Central this evening to see if I
can make my first QSO with it. May be on later if conditions aren't
good early on.


Re: Pic El

Mike Broga <w9qs@...>
 


PIC EL III

Bill Wood
 

Greetings Mike
Just a quick note, I downloaded all the
lessons and the assembly files for this
project, and now they are printed out and
in a plastic enclosed three ring binder with
the schematic on front and back covers : )
Looking forward to this adventure.
Thanks Again
Bill


Re: About the new Crickett transceiver

ai9e_qrp@...
 

Arnie, thanks for your comments on the Cricket transceiver.  The schematic can be found at  http://www.4sqrp.com/kits/night_insect/cricketschematic_3-31-2017.png

  You will notice many unique circuits in use here.  The PA runs Class-E, efficiently delivering 0.5 to 1.2 W from a single 2N7000 transistor, which barely gets warm.  In the receive mode, it hears approximately -110 dBm, and is very resistant to AM broadcast bleedthrough.

The Four-State group chose to put the Cricket on 80M, as there are already plenty of kits for 40M.  It would be an easy matter to design one for 40M and 30M, 

The use of the spiral PCB coils is a 4SQRP specialty.  They eliminate hand-wound toroids, which, for a kit supplier, is a possible source of problems for builders.  Many of the problems encountered by inexperienced kit builders have to do with improperly wound toroids, or poorly stripped magnet wire.  The Cricket was designed to be as simple to build and foolproof as possible.


There are many more new kits in the works from 4SQRP, so stay tuned!


73 Dave Cripe NM0S

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