Date   

Re: Hi-Per-Mite Center Frequency

Gwen Patton
 

Dale...I believe it's called a "QCX". At least, that's what I built. ;)

73,
Gwen, NG3P

On Thu, Aug 15, 2019 at 11:23 AM Dale Hardin <joe.dale.hardin@...> wrote:
John, I may want to mod the OCX for SSB until I get the code down pat.  I think a variable bandwith ssb/cw filter would be nice.  Is your variable cw filter wide enough for ssb?  If so, can you make the design available?
--
Dale Hardin, KS4NS
Elberta, AL



--

-+-+-+-+-
Jenny Everywhere's Infinite: Quark Time
http://quarktime.net


Re: SSB Mite

n4mj
 

HI John,
Up front I'm not familiar with that particular 'audio' filter, however, it has been my experience that 'add on audio filters' are connected via the headphone jack for use with headphones OR between the chassis and the speaker.

I have the FT 817ND with a CW filter installed internally. Works great. May want to consider that route if you are a big fan of CW - which is about all I work.

73 de n4mj//glenn


 
PLEASE REMOVE all email addresses before you send it on and use BCC option when forwarding"
  Thank you! 



On Thursday, August 15, 2019, 11:13:58 AM CDT, John KK4ITX via Groups.Io <jleahy00@...> wrote:


I purchased and have almost completed the SSB Mite Filter but have not completed yet due to shortage of a 100k pot back that I have in my Florida inventory.

The question:  The manual on Page 2 implies that this filter will also work as a CW filter which I need for my FT-818.  The area of the following statement leads to nowhere that I can see:

"Alternately, it may be used as an addon audio filter internally, in conjunction with an existing receiver that might need a CW filter.  Each option has a different assembly sequence".

What I'm trying to do is attain a narrow filter without having two on board...……… any ideas where I should proceed, the options offered appear to only cover the volume ?

I did note the same statement in the Hyper Mite manual.

Appreciate any insight or pointing out my oversight,

John
KK4ITX



Click Here for Zephyrhills Area Amateur Radio Club
Many of life's failures are people who
did not realize how close they were to
success when they gave up.
       Thomas A. Edison     


Re: 40M Net

n4mj
 

David, KB1PJ, FWIW - you were the only station I was hearing last evening.  No net, just you.  I am curious if there is an actual net or is it just a watering hole for those who want to meet at a specified time/date.

If there was an actual net, with a NCS, I hope we didn't cause them QRM.

Maybe some of those who are closer to the 4S center-point will enlighten us.

73 de n4mj//glenn


 
PLEASE REMOVE all email addresses before you send it on and use BCC option when forwarding"
  Thank you! 



On Thursday, August 15, 2019, 07:52:36 AM CDT, David Speltz <dspeltz@...> wrote:


I have tried for months to join the net.  Now I know you hear me.  And I hear you.  But it would be helpful if someone could describe the protocol for hams like me who are trying to join the net without being a nuisance.  Honest,  But at least  I was heard!  That is good.

David KB1PJ
New Hampshire
#1885


SSB Mite

John - KK4ITX
 

I purchased and have almost completed the SSB Mite Filter but have not completed yet due to shortage of a 100k pot back that I have in my Florida inventory.

The question:  The manual on Page 2 implies that this filter will also work as a CW filter which I need for my FT-818.  The area of the following statement leads to nowhere that I can see:

"Alternately, it may be used as an addon audio filter internally, in conjunction with an existing receiver that might need a CW filter.  Each option has a different assembly sequence".

What I'm trying to do is attain a narrow filter without having two on board...……… any ideas where I should proceed, the options offered appear to only cover the volume ?

I did note the same statement in the Hyper Mite manual.

Appreciate any insight or pointing out my oversight,

John
KK4ITX



Click Here for Zephyrhills Area Amateur Radio Club
Many of life's failures are people who
did not realize how close they were to
success when they gave up.
       Thomas A. Edison     


Re: Hi-Per-Mite Center Frequency

Dale Hardin
 

John, I may want to mod the OCX for SSB until I get the code down pat.  I think a variable bandwith ssb/cw filter would be nice.  Is your variable cw filter wide enough for ssb?  If so, can you make the design available?
--
Dale Hardin, KS4NS
Elberta, AL


Re: Hi-Per-Mite Center Frequency

Dale Hardin
 

I'm not likely to mess with the cw filter on the OCX when it arrives and gets constructed.  My HPM is going into my Century 21 rig.  I just ran an analysis of the HPM on LTSpice.  Steep, quick learning curve.  Two things, the resistor names in the LTSpice file are different from the HPM schematic, so beware.  I had taken the spreadsheet results for 750 hz center frequency and found the nearest E64 resistor value.  I plugged those values into LTSpice and got a center frequency of 740.9 hz with -3db bandwidth of 161 hz. YMMV.  So, I am happy with the results and learned a little bit along the way.  Dale KS4NS

 
--
Dale Hardin, KS4NS
Elberta, AL


Re: 40M Net

John - KK4ITX
 

David,

Well, CW nets run the same as others and I have had it happen to me, anyone that can be heard that the NC can't should pick up the relay for you...… I believe that is covered in the NAQCC guide.

I usually look up a Call prior to sending an email so that I have some background but today I was more involved with my coffee !  If I had done my usual I would have seen that you were in Portsmouth and that you are not as new to CW as I am but I hope the links help.  I have about 3yrs on you and just picked up CW a few years ago so I need all of the help that I can get.  The QRP Bug got me in 2013 and that occupies 90% of my radio life now...….. way too much fun.

73,

John
KK4ITX


Click Here for Zephyrhills Area Amateur Radio Club
Many of life's failures are people who
did not realize how close they were to
success when they gave up.
       Thomas A. Edison     


On ‎Thursday‎, ‎August‎ ‎15‎, ‎2019‎ ‎09‎:‎55‎:‎23‎ ‎AM‎ ‎EDT, David Speltz <dspeltz@...> wrote:


Those are useful guidelines.  What if NC cannot hear you but others can.  That has been, I think, one of my problems.  By the way, I am in Portsmouth, NH.  Maybe we have heard each other Sunday mornings on either QCWA or PCARC nets.  Thanks.  I will try again next Wednesday if possible.


Re: Hello

Dale Hardin
 

Thanks for the welcome.  You may have to wait a while to work me.  The code practice is taking some time.  Much easier when I was younger and taking the advanced test.  Regards, Dale KS4NS

On Thu, Aug 15, 2019 at 8:20 AM Dr Jim Kennedy via Groups.Io <phdad_ccm=yahoo.com@groups.io> wrote:
Dale: welcome aboard. I am retired and often work up into Canada on CW/SSB QRP. Hope to hear and possible work you on the air some time.
--
*72/73, Doc - K2PHD
FN20qv - SKCC#5669 - NAQCC#9194 - FISTS#18988*



--
Dale Hardin
24750 State St. Unit 487
Elberta, AL 36530
251-597-9256

--
Dale Hardin, KS4NS
Elberta, AL


Re: The Lightbulb QSO Party

Dave Belville <davebelville@...>
 

HA!

 

73 de Dave,  NI9M

 

From: main@4SQRP.groups.io <main@4SQRP.groups.io> On Behalf Of Gary Kohtala via Groups.Io
Sent: Monday, August 12, 2019 11:18 PM
To: main@4sqrp.groups.io
Subject: Re: [4SQRP] The Lightbulb QSO Party

 

If one uses a 100w bulb instead of a 6w bulb will the resulting signal be significantly stronger? 😉🙈

Best regards,

Gary, K7EK

Sent from BlueMail

On Aug 9, 2019, at 19:20, Paul Smith <n0nbd@...> wrote:

Sounds good to me. I have used a 6 watt exit light bulb and socket as a dummy load and it worked fine. I used it once with a home brewed tuner and tuned for full brilliance hi hi de Paul

 

 

Sent from Outlook


From: main@4SQRP.groups.io <main@4SQRP.groups.io> on behalf of Walter - K5EST <walter.k5est@...>
Sent: Friday, August 9, 2019 10:23 PM
To: 4SQRP@groups.io <4SQRP@groups.io>
Subject: [4SQRP] The Lightbulb QSO Party

 

For many years OzarkCon has been the host of the famous Dummy Load Antenna QSOs. An example is at Terry's WA0ITP website.....

 

Now we have another challenge.....The Lightbulb QSO Party.......

 

Have not tried the lightbulb in a long time but they do work, and be careful because you may see the SWR gradually jumping High! Old school filament lightbulbs are used! 

 

73,

 

Walter Dufrain - K5EST - QRPcw

.....   Four St@te QRP Group   ....

.........  St Louis QRP Society .......


Re: Hi-Per-Mite Center Frequency

John Kirby
 

 qcx audio filter from CW to ssb es ft8 es WSPR / RX
The QCX is already setup to TX WSPR (menu driven) but must be time synced with WWV to within +/- one srcond.

The QCX can also be enjoyed as a general coverage SSB HF receiver

... reff :  qcx manual 1.08    # 5.7 ...CW filter

The QCX audio filter is a very well designed CW filter therefor can not pass SSB voice or FT8 or WSPR

You will need to bypass OR modify the QCX onboard CW audio filter to enjoy QCX SSB :

To bypass....
Locate R27 and R29.
Lift (unsolder) the leg of R29 that connects to R27.
Lift (unsolder) the plus (+) leg of C21.
I found it much easier to cut the trace between C21 (+) and IC9A (pin 1).
Solder a jumper from the now open pad at R29 to C21 (+) pad.
 then  plug your new outboard SSB filter into the PHONES jack.

All other QCX functions work as designed to include CW at a much wider bandwith.

Take  lQQk at this site
 http://www.bowdenshobbycircuits.info/opamp.htm
Drop down to  "2nd Order Opamp Filters" where the example is 200 Hz
...then... plug in your choice of freq for example 2500 Hz.

I also have first hand experience here...
>>>>http://www.circuitstoday.com/band-pass-filters<<<<
I plug these  math equations into EXCEL
then built several BPF ... to include a >variable< CW band pass filter
THAT WORKED FIRST TIME :>))

72, 73
John
N3AAZ 


Re: 40M Net

David Speltz
 

Those are useful guidelines.  What if NC cannot hear you but others can.  That has been, I think, one of my problems.  By the way, I am in Portsmouth, NH.  Maybe we have heard each other Sunday mornings on either QCWA or PCARC nets.  Thanks.  I will try again next Wednesday if possible.


Re: 40M Net

John - KK4ITX
 

Hi David,

I’ll have to check your QTH and see where you are in relationship to me in Wells, Maine.  I tried and could not hear much on 7.122 but I noted NC moved up so yet another lesson learned !

Check out NAQCC Nets for a guide to net ops: http://naqcc.info/cw_nets.html

And also the SKCC:  http://www.skccgroup.com/

Between these two you should get a good idea, to start with I jotted down on a 3x5 Card the expected exchanges so I wouldn’t have to think about them while trying think about the code.

I joined both of the above clubs plus 4S and several others.  Coming up this Sunday is a Skeeter Hunt (NJQRP), Leaf Peepers in October and too many more QRP events on my calendar.

I’ll be trekking back to Florida in a few weeks, perhaps I can work you from there.

73,

John
KK4ITX 
Wells Maine / ZephyrHills Florida 


If you need a parachute and don't have one you probably won't need one again.

On Aug 15, 2019, at 08:52, David Speltz <dspeltz@...> wrote:

I have tried for months to join the net.  Now I know you hear me.  And I hear you.  But it would be helpful if someone could describe the protocol for hams like me who are trying to join the net without being a nuisance.  Honest,  But at least  I was heard!  That is good.

David KB1PJ
New Hampshire
#1885


Re: Hello

Dr Jim Kennedy
 

Dale: welcome aboard. I am retired and often work up into Canada on CW/SSB QRP. Hope to hear and possible work you on the air some time.
--
*72/73, Doc - K2PHD
FN20qv - SKCC#5669 - NAQCC#9194 - FISTS#18988*


Re: 40M Net

David Speltz
 

I have tried for months to join the net.  Now I know you hear me.  And I hear you.  But it would be helpful if someone could describe the protocol for hams like me who are trying to join the net without being a nuisance.  Honest,  But at least  I was heard!  That is good.

David KB1PJ
New Hampshire
#1885


Re: Hi-Per-Mite Center Frequency

Dale Hardin
 

I found the LTSpice files in the Folders.  Now to play with LTSpice.

On Thu, Aug 15, 2019 at 7:26 AM Dale Hardin via Groups.Io <joe.dale.hardin=gmail.com@groups.io> wrote:
It's interesting that the 770 hz center frequency in that table has the same resistor values for a 750 hz center frequency as calculated by the spreadsheet I downloaded elsewhere.  I have ordered an OCX kit, so I will need to confirm the correct resistor values.  Somewhere, I saw an LTSpice file for the HPM.  I'll find it again.
--
Dale Hardin, KS4NS
Elberta, AL



--
Dale Hardin
24750 State St. Unit 487
Elberta, AL 36530
251-597-9256

--
Dale Hardin, KS4NS
Elberta, AL


Re: Hi-Per-Mite Center Frequency

Dale Hardin
 

It's interesting that the 770 hz center frequency in that table has the same resistor values for a 750 hz center frequency as calculated by the spreadsheet I downloaded elsewhere.  I have ordered an OCX kit, so I will need to confirm the correct resistor values.  Somewhere, I saw an LTSpice file for the HPM.  I'll find it again.
--
Dale Hardin, KS4NS
Elberta, AL


Re: Hi-Per-Mite Center Frequency

John Kirby
 

  
Dale,

The Hi Per Mite also enjoys a gQQd life here...

 https://www.qrp-labs.com
 https://www.qrp-labs.com/qcx/qcxmods

with lots of mods and documentation...

Dave's N0MS hipermite specific ... here...
https://www.qrp-labs.com/qcx/qcxmods#cwcenter

72 73
John
N3AAZ


Re: Nouveau 75 Errata

K4ENC
 

THE HEATING PROBLEN FIXED   REPLACED Q 11...………….
WHEN RIG IS TURNED ON DESPLY  SHOWS   NO 75 AND THEN GOES TO FREQ THAT WAS SET????? ANY IDEAS???
                            BOB  K4ENC

-----------------------------------------

From: "K4ENC"
To: "main@4SQRP.groups.io"
Cc:
Sent: Monday August 12 2019 2:04:32PM
Subject: Re: [4SQRP] Nouveau 75 Errata

HI  DAVE
             7.1 V  ACROSS R39                      NOTHING TO GR.

-----------------------------------------

From: "Dave Benson"
To: main@4sqrp.groups.io
Cc:
Sent: Monday August 12 2019 1:16:47PM
Subject: Re: [4SQRP] Nouveau 75 Errata

The voltage across R39 (10K) should be 0V in receive. You also want to verify
 the resistance to ground there (w/ power removed) in case there's a short somewhere.

- Dave, K1SWL


On Mon, Aug 12, 2019 at 8:20 AM K4ENC <K4ENC@...> wrote:

Looking   some volt reading around  Q11  and D 6……………….Q11 running very hot in rec.

                                                       Bob

 

Sent from Mail for Windows 10

 


Hello

Dale Hardin
 

I am an avid kit builder and have enjoyed building 4SQRP kits over the years.  I didn't know there was an online group until just recently.  I have built the QRPometer, NB6M HF Test Set, and have ordered the Hi-Per-Mite.  I am now re-learning the code in anticipation of putting my new-to-me TenTec Century 21 on the air.  Regards to all, Dale
--
Dale Hardin, KS4NS
Elberta, AL


Hi-Per-Mite Center Frequency

Dale Hardin
 

I need some assistance with my effort to change the center frequency to 750 Hz.  I have new resister values, but would like to have them confirmed with LTSpice.  I understand  someone in the group already has HPM in LTSpice.  Once I hear back from someone able to help out, I will post the resistor values I want checked out.  Thanks, Dale
--
Dale Hardin, KS4NS
Elberta, AL

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