Date   

Re: Question about 4S Tuner

Jim, N5IB
 

Hi Tim,

Since you're not hearing any peak in background noise or signal when making adjustments, it's probably something in the LC Tee network, rather than in the SWR bridge or indicator circuit.

First question... is there any change in background noise when you switch from "IN" to "OUT" ?

Second... measuring from the top of L1 to ground with an ohm meter, is there essentially a DC short (~ zero ohms) for ***every*** position of SW1 ?

Third... measuring from J1-1 to J2-1 with the SWR bridge "OUT" do you see an open circuit condition ? With the bridge "IN" do you see a few ohms ?

Fourth... do you have any instrument capable of measuring capacitance in the tens to hundred of pF range ? If so, can you check C1 and C2 that they do in fact vary from a couple of tens of pF up to their max of 250 pF

Jim, N5IB


Re: Question about 4S Tuner

Curt
 

Tim

Very unusual for a tuner not to work at all, unless wire is way to short. Check that connections are real with a dvm, once myself I experienced a connector solder joint that wasn't real but open.

Try on different bands, like 80m which has more noise.

Curt


Question about 4S Tuner

Timothy East
 

I built the tuner and cannot seem to get any response out of it.
I never experience the response shown on various videos.
There doesn’t seem to be any position on central knob with louder audio.
Examination of the build does not reveal any obvious issues. Does anyone have any suggestions?
It’s too bad really as the build turned out with a handsome unit I’d like to use with my BJ.

Tim
K0EMP


Re: QRP QUARTERLY 25 years & More - Journal Collection DVD 2020 ( ... Onwards ... )

David Wilcox
 

The Toy Store is run by a volunteer.  In the past it has taken a while for a response but I always got replies.

Dave K8WPE

David J. Wilcox’s iPad

On Jan 8, 2021, at 11:01 PM, w2sh@... wrote:


Be patient Andy,

You may not have to wait too long to be part of the United Kingdom.  It may work better then.

72,

Charles, W2SH
GQRP 8662


From: main@4SQRP.groups.io <main@4SQRP.groups.io> on behalf of Andy - GM0NWI via groups.io <andy.gm0nwi1@...>
Sent: Friday, January 8, 2021 15:57
To: main@4sqrp.groups.io <main@4sqrp.groups.io>
Subject: [4SQRP] QRP QUARTERLY 25 years & More - Journal Collection DVD 2020 ( ... Onwards ... )
 
Hi Everyone ....

A bit off-topic perhaps and i apologise to the group list moderators

Im asking here as i know some of you will have done this on occasion for yourself

Myself and my family tried to find out the current correct QRP ARCI officer and procedure again to purchase the dvd in the subject heading for christmas there

Alas this was  to no avail with no answers to my sisters enquires to the toystore

I would very much still like to have the updated dvd   I always have this same trouble each time we try to order this dvd

Perhaps its due to the fact i have a qth in Scotland - United Kingdom

And NOT The U.S.A  or Canada ??

Can some help my family get the show on the road happenin with this for me by assistance somehow ?

Thankyou

Much Obliged !

72’s 73’s
Andy - GM0NWI
The City Of Stirling
Central
Scotland
United Kingdom






--
Charles Moizeau, W2SH


Re: For what is a crystal spotter used?

 

Jim

With regards to spotting I also was never able to use the key down in RX to spot my frequency. As you mention the heterodyne is widely spaced and not very loud. By accident one day I tried using my Whiterook mini keyer (Tick-2 ) in the straight key mode. Without touching my regen or atten I now get a loud heterodyne with a small dead spot. I have no problem spotting almost exactly on 700 Hz.
It works great but I don’t know why. I’d be happy to take some measurements if anyone is interested. The only mod I have is the TIP42g transistor for the external keyer.

72
Peter
AA2VG

On Jan 8, 2021, at 7:53 PM, Jim, N5IB <n5ib@juno.com> wrote:

The question asked was, "why not just power the Bayou Jumper's oscillator, but not the PA, and just listen for the signal in the receiver?"

The answer is - The Bayou Jumper does in fact work exactly that way. When you press the key while in the receive mode, the oscillator is activated, but not the PA. It was designed to do that. The signal can be heard in the receiver. Great, just what's needed, right ?!

Well, not so much....

Remember, the receiver is a regen. That means that any strong signal will pull the receiver onto the signal frequency. And remember that the source of that signal (many many millivolts) is right on the same PC board, just a few cm away from the detector. The zero beat "point" on the dial ends up being a broad region, with no some strong over a fair amount of dial in the middle and squeals on either side.

Now, if you run the regeneration control all the way to max, run the attenuation all the way to max attenuation, and turn the AF gain way down, you can sometimes just about get away with it. But then you have to reset everything back to normal receiving. Much simpler to have a little oscillator sitting next to the rig. Touch the crystal to it, and a clearly discernible, but not overly strong, signal can be heard. Tune to zero beat, pop the crystal back in the rig (maybe mark the dial) and you're ready to roll. You'll hear everything with three of four kHz of the zero beat point.

Bottom line, there's just not an easy way to knock down the signal strength of the internal oscillator to the point where it will play nice with a regen detector. BTW - the original Paraset couldn't spot it's own signal either. The B+ was switched off the receiver during transmit. But, they didn't have to. They knew where to listen for London (definitely QRO!) , and London knew what crystals they had.

BTW - When David designed the Soup'er Up'er he had to fight that problem to get a working sidetone. The audio amp had to still be powered during Tx, but he had to knock down the Rx output with a MOSFET switch.

Jim, N5IB






--
Peter S. DeLuca
AA2VG


Re: A simple frequency spotting modification kit for legacy Bayou Jumpers.

Joshua Wood
 

Put me down for a kit when they're available!

~Josh
W0ODJ


Re: QRP QUARTERLY 25 years & More - Journal Collection DVD 2020 ( ... Onwards ... )

w2sh@...
 

Be patient Andy,

You may not have to wait too long to be part of the United Kingdom.  It may work better then.

72,

Charles, W2SH
GQRP 8662


From: main@4SQRP.groups.io <main@4SQRP.groups.io> on behalf of Andy - GM0NWI via groups.io <andy.gm0nwi1@...>
Sent: Friday, January 8, 2021 15:57
To: main@4sqrp.groups.io <main@4sqrp.groups.io>
Subject: [4SQRP] QRP QUARTERLY 25 years & More - Journal Collection DVD 2020 ( ... Onwards ... )
 
Hi Everyone ....

A bit off-topic perhaps and i apologise to the group list moderators

Im asking here as i know some of you will have done this on occasion for yourself

Myself and my family tried to find out the current correct QRP ARCI officer and procedure again to purchase the dvd in the subject heading for christmas there

Alas this was  to no avail with no answers to my sisters enquires to the toystore

I would very much still like to have the updated dvd   I always have this same trouble each time we try to order this dvd

Perhaps its due to the fact i have a qth in Scotland - United Kingdom

And NOT The U.S.A  or Canada ??

Can some help my family get the show on the road happenin with this for me by assistance somehow ?

Thankyou

Much Obliged !

72’s 73’s
Andy - GM0NWI
The City Of Stirling
Central
Scotland
United Kingdom






--
Charles Moizeau, W2SH


Re: What Kit's would be nice for 2021

Tom Denton
 

I'll second the return of the freq-mite. I seem to use it on anything that doesn't have a dial or digital readout. Although I am sitting here thinking about the crystal spotter in an HW-8 has a dial calibrator.


Re: Possible Bayou Jumper operating event

Johnny AC0BQ
 

Hello Jim and the Group.
Count me in!!
I have a freshly built Bayou Jumper 
Just waiting to Rock!!
72
Johnny ACØBQ 

On Fri, Jan 8, 2021 at 7:19 PM OwlCricker - K7ULM <dickw299@...> wrote:
I like your style.  

On Fri, Jan 8, 2021, 6:13 PM Jim, N5IB <n5ib@...> wrote:
Calling all Agents...

How's this for an event to simulate how it was done "back in the day"

We recruit a QRO station (biiiiiig  honkin'  leenyar)  to be "London"
"London" sits down on, say 7105 kHz, and calls CQ
Bayou Jumpers plug in their 7122 rocks and try to work "London"
"London" has to tune all around 7122 to find those Jumpers in their  cute little QRP pileup.

Maybe "London" sends a unique BBC-style "message for our friends…" to each caller
  e.g. "Jean has a long mustache"   "the porridge is cold"  etc

Certificate or QSL to each agent who copies successfully.
Extra Spam ration coupon to "London" for the effort.
For more realism, "London" ought to be a YL

How many Bayou Jumpers could we get to congregate?
Could we find a way for those poor, Jumperless, QRPers to join in?

Jim, N5IB







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


Re: Possible Bayou Jumper operating event

OwlCricker - K7ULM
 

I like your style.  


On Fri, Jan 8, 2021, 6:13 PM Jim, N5IB <n5ib@...> wrote:
Calling all Agents...

How's this for an event to simulate how it was done "back in the day"

We recruit a QRO station (biiiiiig  honkin'  leenyar)  to be "London"
"London" sits down on, say 7105 kHz, and calls CQ
Bayou Jumpers plug in their 7122 rocks and try to work "London"
"London" has to tune all around 7122 to find those Jumpers in their  cute little QRP pileup.

Maybe "London" sends a unique BBC-style "message for our friends…" to each caller
  e.g. "Jean has a long mustache"   "the porridge is cold"  etc

Certificate or QSL to each agent who copies successfully.
Extra Spam ration coupon to "London" for the effort.
For more realism, "London" ought to be a YL

How many Bayou Jumpers could we get to congregate?
Could we find a way for those poor, Jumperless, QRPers to join in?

Jim, N5IB








Possible Bayou Jumper operating event

Jim, N5IB
 

Calling all Agents...

How's this for an event to simulate how it was done "back in the day"

We recruit a QRO station (biiiiiig honkin' leenyar) to be "London"
"London" sits down on, say 7105 kHz, and calls CQ
Bayou Jumpers plug in their 7122 rocks and try to work "London"
"London" has to tune all around 7122 to find those Jumpers in their cute little QRP pileup.

Maybe "London" sends a unique BBC-style "message for our friends…" to each caller
e.g. "Jean has a long mustache" "the porridge is cold" etc

Certificate or QSL to each agent who copies successfully.
Extra Spam ration coupon to "London" for the effort.
For more realism, "London" ought to be a YL

How many Bayou Jumpers could we get to congregate?
Could we find a way for those poor, Jumperless, QRPers to join in?

Jim, N5IB


4SQRP Second Sunday Sprint - Sun, 01/10/2021 19:00-21:00 #cal-reminder

main@4SQRP.groups.io Calendar <main@...>
 

Reminder: 4SQRP Second Sunday Sprint

When: Sunday, 10 January 2021, 19:00 to 21:00, (GMT-06:00) America/Chicago

View Event

Organizer: John Lonigro

Description: 4SQRP Second Sunday Sprint. See http://www.4sqrp.com/4sqrpOnTheAir.php for details.


Re: For what is a crystal spotter used?

Jim, N5IB
 

The question asked was, "why not just power the Bayou Jumper's oscillator, but not the PA, and just listen for the signal in the receiver?"

The answer is - The Bayou Jumper does in fact work exactly that way. When you press the key while in the receive mode, the oscillator is activated, but not the PA. It was designed to do that. The signal can be heard in the receiver. Great, just what's needed, right ?!

Well, not so much....

Remember, the receiver is a regen. That means that any strong signal will pull the receiver onto the signal frequency. And remember that the source of that signal (many many millivolts) is right on the same PC board, just a few cm away from the detector. The zero beat "point" on the dial ends up being a broad region, with no some strong over a fair amount of dial in the middle and squeals on either side.

Now, if you run the regeneration control all the way to max, run the attenuation all the way to max attenuation, and turn the AF gain way down, you can sometimes just about get away with it. But then you have to reset everything back to normal receiving. Much simpler to have a little oscillator sitting next to the rig. Touch the crystal to it, and a clearly discernible, but not overly strong, signal can be heard. Tune to zero beat, pop the crystal back in the rig (maybe mark the dial) and you're ready to roll. You'll hear everything with three of four kHz of the zero beat point.

Bottom line, there's just not an easy way to knock down the signal strength of the internal oscillator to the point where it will play nice with a regen detector. BTW - the original Paraset couldn't spot it's own signal either. The B+ was switched off the receiver during transmit. But, they didn't have to. They knew where to listen for London (definitely QRO!) , and London knew what crystals they had.

BTW - When David designed the Soup'er Up'er he had to fight that problem to get a working sidetone. The audio amp had to still be powered during Tx, but he had to knock down the Rx output with a MOSFET switch.

Jim, N5IB


Re: For Sale

Bobby Rolph
 

The MRT 3b has been sold. 73
Bobby


QRP QUARTERLY 25 years & More - Journal Collection DVD 2020 ( ... Onwards ... )

Andy - GM0NWI
 

Hi Everyone ....

A bit off-topic perhaps and i apologise to the group list moderators

Im asking here as i know some of you will have done this on occasion for yourself

Myself and my family tried to find out the current correct QRP ARCI officer and procedure again to purchase the dvd in the subject heading for christmas there

Alas this was to no avail with no answers to my sisters enquires to the toystore

I would very much still like to have the updated dvd I always have this same trouble each time we try to order this dvd

Perhaps its due to the fact i have a qth in Scotland - United Kingdom

And NOT The U.S.A or Canada ??

Can some help my family get the show on the road happenin with this for me by assistance somehow ?

Thankyou

Much Obliged !

72’s 73’s
Andy - GM0NWI
The City Of Stirling
Central
Scotland
United Kingdom


Re: A simple frequency spotting modification kit for legacy Bayou Jumpers.

cornhusker
 

Me too.  I'd like a kit!   Put me on the list.  
De K0NEB 


On Fri, Jan 8, 2021 at 12:08 PM, John Parker
<parkjv1@...> wrote:
Count me in as well!

John WH6DQU 

On Thu, Jan 7, 2021 at 3:52 PM Hinds, Don <hindsdw@...> wrote:
Inquiring minds want to know...but I'm in

WD4ON

On Thu, Jan 7, 2021 at 11:20 AM Doug Dukes <dougdukes@...> wrote:
I am not sure even what this is.... but if it is for the Bayou Jumper..... count me in.


Re: A simple frequency spotting modification kit for legacy Bayou Jumpers.

John Parker
 

Count me in as well!

John WH6DQU 

On Thu, Jan 7, 2021 at 3:52 PM Hinds, Don <hindsdw@...> wrote:
Inquiring minds want to know...but I'm in

WD4ON

On Thu, Jan 7, 2021 at 11:20 AM Doug Dukes <dougdukes@...> wrote:
I am not sure even what this is.... but if it is for the Bayou Jumper..... count me in.


Re: What Kit's would be nice for 2021

WR9H
 

Thanks for this, John. I had in mind an actually transmitter and only used the handheld as a receiver. Something like the Ingram Hamfest Buddy transmitter from years ago.
Herb/ WR9H




From: main@4SQRP.groups.io <main@4SQRP.groups.io> on behalf of John - KK4ITX via groups.io <jleahy00@...>
Sent: Thursday, January 7, 2021 1:22 PM
To: main@4SQRP.groups.io <main@4SQRP.groups.io>
Subject: Re: [4SQRP] What Kit's would be nice for 2021
 
Here's a 2m FM unit that you can try.  Although it's on my website I have never tried it myself....... I thought that some of the locals would enjoy practicing CW but it was a dead end.

Really not very complicated, no bells and whistles.  I probably have most all the parts if you don't and would share them.  You would need a box and some battery power, perhaps a 9V ?


John



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, January 7, 2021, 02:01:24 PM EST, WR9H <herbcase@...> wrote:


I would like to see  a simple 2 meter cw/ kit transmitter that could be heard in our handhelds. 
Herb/WR9H


From: main@4SQRP.groups.io <main@4SQRP.groups.io> on behalf of Bill Lamm <kd9mdl@...>
Sent: Thursday, January 7, 2021 11:56 AM
To: main@4SQRP.groups.io <main@4SQRP.groups.io>
Subject: Re: [4SQRP] What Kit's would be nice for 2021
 
N2USC "6m xceiver kit would be great, either CW or SSB or both."

I like that idea as well

KD9MDL


Re: For what is a crystal spotter used?

Johnny AC0BQ
 

gm Mark 
See the previous postings! 
72 
Johnny 

On Fri, Jan 8, 2021 at 10:07 AM Mark Sharef <hamradio.wq8s@...> wrote:
Why not a dummy load and an antenna switch.  Look at the qrpme super tuna 2 plus. 

On Fri, Jan 8, 2021 at 7:53 AM Johnny AC0BQ <jomatlock@...> wrote:
Gm John 
Any crystal.
The radio doesn’t matter, it’s stand alone.
Johnny ACØBQ 

On Thu, Jan 7, 2021 at 10:33 PM John Parker <parkjv1@...> wrote:
So, is the crystal spotter for the original bayou jumper or can it be used for both the older and the newest version that I just bought?

Mahalo,

John WH6DQU 


On Thu, Jan 7, 2021 at 10:51 AM Jim, N5IB <n5ib@...> wrote:
A crystal spotter is just a simple oscillator which will emit a very low level signal when a crystal is attached. It's used to locate the crystal's operating frequency in a receiver, when the receiver is not slaved to the same oscillator as its companion  transmitter.

It's very useful with the Bayou Jumper, which has a wide pass band regenerative receiver, completely independent of the transmitter.  If you're calling CQ with a Bayou Jumper you need to know where on the receiver dial to look for replies, since most operators using modern VFO controlled transceivers will zero beat your signal. It also helps to find out if there is other activity on your crystal frequency so you won't QRM them.

The spotter does not have to be connected to the receiver, just placed nearby. Enough signal leaks out to be easily heard.

BTW - whenever you are the "other op" trying to call and work a Bayou Jumper, remember that poor fellow has a regen. It's wide as a barn door, very sensitive, but he has to manually throw a switch and then perhaps tweak the tuning a bit to get back to where he was.  His or her tuning may be as much as a couple kHz or more from a dead-on zero beat. So the typical "drop your call once" won't cut it.
Sending  "callsign  callsign   de   mycall  mycall   AR" is makes it much easier for that poor schmuck  :^))
Back in the "spy days" the home station would call the outstation for several minutes to allow time for the hard pressed agent to get everything tweaked up.

second BTW - because of all this, a Jumper-to-Jumper QSO is a real challenge and an accomplishment to be savored.

Jim, N5IB
007
Bayou Jumper almost WAS....   -AK






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


Re: For what is a crystal spotter used?

Mark Sharef
 

Why not a dummy load and an antenna switch.  Look at the qrpme super tuna 2 plus. 


On Fri, Jan 8, 2021 at 7:53 AM Johnny AC0BQ <jomatlock@...> wrote:
Gm John 
Any crystal.
The radio doesn’t matter, it’s stand alone.
Johnny ACØBQ 

On Thu, Jan 7, 2021 at 10:33 PM John Parker <parkjv1@...> wrote:
So, is the crystal spotter for the original bayou jumper or can it be used for both the older and the newest version that I just bought?

Mahalo,

John WH6DQU 


On Thu, Jan 7, 2021 at 10:51 AM Jim, N5IB <n5ib@...> wrote:
A crystal spotter is just a simple oscillator which will emit a very low level signal when a crystal is attached. It's used to locate the crystal's operating frequency in a receiver, when the receiver is not slaved to the same oscillator as its companion  transmitter.

It's very useful with the Bayou Jumper, which has a wide pass band regenerative receiver, completely independent of the transmitter.  If you're calling CQ with a Bayou Jumper you need to know where on the receiver dial to look for replies, since most operators using modern VFO controlled transceivers will zero beat your signal. It also helps to find out if there is other activity on your crystal frequency so you won't QRM them.

The spotter does not have to be connected to the receiver, just placed nearby. Enough signal leaks out to be easily heard.

BTW - whenever you are the "other op" trying to call and work a Bayou Jumper, remember that poor fellow has a regen. It's wide as a barn door, very sensitive, but he has to manually throw a switch and then perhaps tweak the tuning a bit to get back to where he was.  His or her tuning may be as much as a couple kHz or more from a dead-on zero beat. So the typical "drop your call once" won't cut it.
Sending  "callsign  callsign   de   mycall  mycall   AR" is makes it much easier for that poor schmuck  :^))
Back in the "spy days" the home station would call the outstation for several minutes to allow time for the hard pressed agent to get everything tweaked up.

second BTW - because of all this, a Jumper-to-Jumper QSO is a real challenge and an accomplishment to be savored.

Jim, N5IB
007
Bayou Jumper almost WAS....   -AK






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

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