Date   

Re: BJ build - TX Xtal doesn't swing

Raimund Reh
 

@Kent
I took this chinese transistortester LCR-T4 Transistor Diode tester - you'll find several offers on the bay.

@ folks in the group
got IRF-510 from MOUSER - none of the 20pcs batch has the announced 180pF acc. datasheet but less 400pF. please refer to the pics I added.
5wtts out should be good4fun - shouldn't?

so cheers for 4nw - Ray


Re: 40m Net

Ruth A Mumaw
 

Bill, Good morning,


I feel I may need to defend my signal report to you last night. 339 was my best average of your signals. At times you were 599 for very brief periods, and would then fade out completely. With enough repeats of your words I think I could say you were 100% copy. The radio here, by the way, is my new QCX-40 running 4.1 watts measured out put with my calibrated Bird wattmeter, and in an upcoming article to be published in the "K9YA Telegraph" is my comparison of the QCX receiver to my Elecraft K-2. They are both impressive,but the K-2 won out when the preamp is turned on. The K-2 is my main go to raio for QRP CW activity. I am also impressed with how well you seem to copy us all, or are you using the internet group of SDR receivers? Really quite a new shift in how some of my friends are augmenting their noise and inadequate antenna situations.


Thanks for being such a good NCS,  Russ  K3NLT

On May 2, 2018 at 9:42 PM dekle <dekle@...> wrote:

The storm QRN was just awful, but managed to get:

WA9PWP     Paul     WI
N4DR          Marc     MD
K3NLT         Russ     VA
KV6Z           Bill        OK (NCS)

Heard no one close in.

Another station was trying but I just couldn't pick them out of the noise.
Thanks and 73

Bill
KV6Z


Re: Bayou Jumper?

Bob Parr
 

Okay, to be clear, if I really want to put the caps on the board, but want
to keep the most flexibility, 10 - 50 uf would be a decent compromise?

Bob
KG5GTE

The two output pins of the NJM2113 audio amp chip (U1) are each biased at
about 6 volts DC. That's why they can't be allowed to be grounded - it
shorts out the bias voltage and zaps the output stage.

So you are correct - if you are using polarized capacitor(s) for DC
blocking, the positive lead(s) should be connected towards the chip's
pin(s)

You might get away with just one capacitor - in series with the ring
terminal. That's the terminal that's likely to get grounded if using a
powered speaker, or a speaker with a mono plug that has a ground path.
But you have to be sure that the tip terminal of your external device
doesn't have a DC path to ground somehow. Many powered speakers or audio
filters already have a blocking capacitor in series with their input.
Check their schematic or physically inspect the device if possible. If
you're not sure, put caps in both leads.

Value depends on what is to be connected. Many powered speakers or audio
filters have a fairly high input impedance, so a smaller capacitor is
sufficient.
For example - suppose the input impedance is 100K. At 300 Hz, even as
small as a 0.1 uF cap has a reactance of only about 5K. So it would not
introduce very much voltage drop. But if the input impedance were like
that of a normal speaker or headphone (a few tens of ohms), very little
signal would get through.

This is why putting the capacitor in the external cable can be a
convenience. You won't interfere with the normal use of your headphones,
and only a smaller value capacitor(s) will probably be needed.

If the capacitor(s) get installed between the PC board and the headphone
jack, and if you still intend to use headphones on occasion, the the
capacitor(s) will need to be much larger - probably at least 10 uF, but
need not be larger than 50 uF or so.

N5IB





Re: 40m Net

ussv dharma
 

could hear kv6z but counld not contact him

If you don't change direction you WILL arrive exactly where you're headed!!
 
MSGT. Susan Meckley, USA (Ret.)
W7KFI-5  & AFZ4SM
 

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

On Thu, 5/3/18, gary Lyons <gary.w0gx@gmail.com> wrote:

Subject: Re: [4SQRP] 40m Net
To: main@4SQRP.groups.io
Date: Thursday, May 3, 2018, 12:10 AM


On 5/2/2018
9:42 PM, dekle wrote:


The storm QRN was
just awful, but managed to get:



WA9PWP     Paul     WI

N4DR          Marc     MD

K3NLT         Russ     VA

KV6Z           Bill        OK
(NCS)



Heard no one close in.



Another station was trying but I just couldn't
pick them out of
the noise.

Thanks and 73



Bill

KV6Z


Bill,


I heard you once clearly.  I heard the DR suffix but
missed
Marc's prefix. 


I sure heard lots of QRN!


--

73,
Gary/w0gx


Re: Wednesday Evening 40 and 80 meter Nets - Wed, 5/2/18 8:00pm-9:00pm #cal-reminder

Wayne Steury
 

I had bad static as well but did hear the QNI call. I may try my HB1B next time. My Pixie is a challenge. I have 13 States now and it seems to be on frequency. My BJ is low in frequency with my KC9ON type crystals. 

Wayne N9EGT 


On May 1, 2018, at 9:00 PM, main@4SQRP.groups.io Calendar <main@4SQRP.groups.io> wrote:

Reminder:
Wednesday Evening 40 and 80 meter Nets

When:
Wednesday, 2 May 2018
8:00pm to 9:00pm
(GMT-05:00) America/Chicago

Where:
40 and 80 Meters

Description:
The 40 Meter Net will be at 8:00 pm central or 0100 UTC on 7.122 +-.
NCS will be Bill KV6Z.

Wednesday evening 80 Meter CW Net. will be at 0130 UTC Thursday (8:30PM Central Time Wednesday). 
The net will be called on 3.564 MHz +/- QRM.



Net control operators are Johnny AC0BQ or Paul N0NBD.

View Event.


Re: 4SQRP 80 METER net

gary Lyons
 

On 5/2/2018 9:41 PM, Paul Smith wrote:

well guys the storm got the the best of the net tonight.

I copied Bill KV6Z

and Chas NK8O

The noise here was S9 PLUS

The thunderboomers are just west of here now. tnx to those that I may may have missed de Paul N0NBD


Sent from Outlook

Nothing but QRN here in SC tonight.

--
73, Gary/w0gx


Re: 40m Net

gary Lyons
 

On 5/2/2018 9:42 PM, dekle wrote:
The storm QRN was just awful, but managed to get:

WA9PWP     Paul     WI
N4DR          Marc     MD
K3NLT         Russ     VA
KV6Z           Bill        OK (NCS)

Heard no one close in.

Another station was trying but I just couldn't pick them out of the noise.
Thanks and 73

Bill
KV6Z

Bill,

I heard you once clearly.  I heard the DR suffix but missed Marc's prefix. 

I sure heard lots of QRN!

--
73, Gary/w0gx


Re: 4SQRP 80 METER net

Charles W. Powell
 

I was tuning around for the net and I heard some NTS stations passing traffic.  Could just make them out with the KX3.  I switched to the new toy, the ELAD FDM-DUO and it was amazing.  Noise was still S9 but the stations just popped out above the QRN.  Paul was well above the noise, especially after I adjusted the AGC threshold.  I thought the KX3 was amazing but WOW!  I did not, however, hear anyone aside from Paul.

72,

Chas - NK8O

On May 2, 2018, at 8:41 PM, Paul Smith <n0nbd@...> wrote:

well guys the storm got the the best of the net tonight.
I copied Bill KV6Z
and Chas NK8O
The noise here was S9 PLUS
The thunderboomers are just west of here now. tnx to those that I may may have missed de Paul N0NBD

Sent from Outlook


Re: 40m Net

John - KK4ITX
 

 Trying to get the hang of this, might have been me you heard but then again maybe not.  Not much signal here in Florida.  80m was a total bust with S9+ noise, no storms just noise.

Someday you will here me and I'll be speechless !

72,

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     


40m Net

dekle <dekle@...>
 

The storm QRN was just awful, but managed to get:

WA9PWP     Paul     WI
N4DR          Marc     MD
K3NLT         Russ     VA
KV6Z           Bill        OK (NCS)

Heard no one close in.

Another station was trying but I just couldn't pick them out of the noise.
Thanks and 73

Bill
KV6Z


4SQRP 80 METER net

Paul Smith
 

well guys the storm got the the best of the net tonight.

I copied Bill KV6Z

and Chas NK8O

The noise here was S9 PLUS

The thunderboomers are just west of here now. tnx to those that I may may have missed de Paul N0NBD


Sent from Outlook


Re: Cricket 30 loud buzzing

Duane Brayton
 

I wonder if the receiver is cycling through an oscillation at audio frequency.  Like trying to super-regenerate, but at an audible rate?

Duane KE0IUV


Sent from TypeApp

On May 2, 2018, at 5:08 PM, "Jess None via Groups.Io" <yahoo.com@groups.io target=_blank>deezulsmoke=yahoo.com@groups.io> wrote:
Update

Hooked up to an antenna and heard a signal. It was weak but it was there. Buried in the buzz.

On May 2, 2018, at 3:45 PM, Jess Gypin < ontarget1911@...> wrote:

I have done some more testing and with my crummy little scope.

I have only run the radio on a 9 volt battery. I did some poking around. Touching the antenna center pin produces loud scratching in the audio. Attaching the ground of the scope probe increases the buzzing. Not really 60 cycle hum, but kind of like that. Sorta like the buzz you get when first plugging a guitar into the amp.
I know it is oscillating right, I can hear it on my FT817.
If I touch the scope probe to the side tone, I see a clean signal. If I touch the scope probe to the amplifier output on pin 8, I get in increase in buzz and the sound changes. Same thing on the input pin 4.
If I transmit with my FT817 into a dummy load, I can hear it LOUDLY in the Cricket. I hear no hiss or band noise on receive connected to an external antenna. Nothing but the buzz. It sounds like a path to ground killing the input sensitivity? But getting loud scratching in the audio touching various point in the audio and RF chain? You would think that would not be the case. 
Thoughts?
Jess AE0CW

On Apr 30, 2018, at 2:21 PM, Jess Gypin < ontarget1911@...> wrote:

I’ll do some more testing. I have several other QRP radios that I run on the same antennas as well as the BJ and none of the others exhibit this symptoms.

On Apr 30, 2018, at 12:38 PM, WA0ITP < wa0itp@...> wrote:

Je ss, Sri I came late to the conversation .

Do es the humm/buzz occur when running on a battery? 
T hat 60 cycl e st uff could be ri ding in on your antenna too.  If so it's a neighbor hood problem. 

In any event , i t sounds lik e you m i ght be a candidate fo r the BuzzKill  http://www.4sqrp.com/buzzkill.php
72 WAØITP
I love this radio stuff.
Back to the bench, Winter is too valuable to waste.
www.wa0itp.com
www.4sqrp.com
On 4/30/2018 1:06 PM, Jess None via Groups.Io wrote:
Gotcha will try

On Apr 30, 2018, at 11:06 AM, Don Pitchford < donw9ebk@...> wrote:

Jess,
I would start by looking at the output of the audio stage with your scope and see if an identifiable pattern shows up. Then move your hand around the board to see if shielding a certain point on the board affects the buzz. I have a LCD TV near the shack that generates a 12kHz pulse that can mess with receivers all the up through 10 meters. I have some Crickets and Pixies that suffer issues similar to what you describe if that TV is plugged in. A well shielded and grounded case fixed part of the problem,  and unplugging the TV fixed the rest.

On Mon, Apr 30, 2018, 10:43 AM Jess Gypin < ontarget1911@...> wrote:
Well,
I verified all components and placement on the board confirmed that all solder joints are good and no solder bridges or shorts.
I have confirmed that when the unit is powered up the oscillator is running. I get .9 or so Watts out. Transmit tone is clean. So having said all that, where do you all think I should start looking? I have not verified operation of the audio chain. A lot of the radios that I have built with a similar problem was a bad ground somewhere. I have a 25 KHz scope (yeah I know not enough band width) and a couple of good DVMs.

Jess AE0CW




Wednesday Evening 40 and 80 meter Nets - Wed, 5/2/18 #cal-notice

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

Wednesday Evening 40 and 80 meter Nets

When:
Wednesday, 2 May 2018
8:00pm to 9:00pm
(GMT-05:00) America/Chicago

Where:
40 and 80 Meters

Description:
The 40 Meter Net will be at 8:00 pm central or 0100 UTC on 7.122 +-.
NCS will be Bill KV6Z.

Wednesday evening 80 Meter CW Net. will be at 0130 UTC Thursday (8:30PM Central Time Wednesday). 
The net will be called on 3.564 MHz +/- QRM.



Net control operators are Johnny AC0BQ or Paul N0NBD.


Re: BJ build - TX Xtal doesn't swing

Retired Doc
 

Ray,

What is the type of transistor tester that you are using?  I have an old M3 Tester but it does not indicate capacitance.  That is really cool!  I had a 77WS  IRF-510 and when I replaced with another I got output.

Best Regard,

Kent KC9LIF


Re: Bayou Jumper--What a Hoot!

Frank Artieta
 

I agree :) The Bayou Jumper is a great rig !


On Wed, May 2, 2018 at 2:55 PM, Clark WU4B <clark.macaulay@...> wrote:
Just finished the BJ I bought at the end of 2017.  No, I'm not that slow, but could start on it until now.  

I've built several of the 4SQRP kits over the years and I have to say this is one of the highest quality kits you guys have done.  Some of the design features required someone to think in 3D--a quality I don't have.  The receiver is hot:  receiving 40m CW on a dummy load.  Transmitter output (measured by a QRPoMeter) was 4.75w.  But the best part is that this kit promises to be a blast to operate.  Can't wait to make Q's and tell people "Rig Hr is BJ" and have them ask "What??".  Final step: fitting it into the wood box from Hobby Lobby.  What a hoot to show at our next meeting of NOGA QRP here in Atlanta. 

Well done, guys.  



Re: Cricket 30 loud buzzing

Jess None
 

Update

Hooked up to an antenna and heard a signal. It was weak but it was there. Buried in the buzz.

On May 2, 2018, at 3:45 PM, Jess Gypin <ontarget1911@...> wrote:

I have done some more testing and with my crummy little scope.

I have only run the radio on a 9 volt battery. I did some poking around. Touching the antenna center pin produces loud scratching in the audio. Attaching the ground of the scope probe increases the buzzing. Not really 60 cycle hum, but kind of like that. Sorta like the buzz you get when first plugging a guitar into the amp.
I know it is oscillating right, I can hear it on my FT817.
If I touch the scope probe to the side tone, I see a clean signal. If I touch the scope probe to the amplifier output on pin 8, I get in increase in buzz and the sound changes. Same thing on the input pin 4.
If I transmit with my FT817 into a dummy load, I can hear it LOUDLY in the Cricket. I hear no hiss or band noise on receive connected to an external antenna. Nothing but the buzz. It sounds like a path to ground killing the input sensitivity? But getting loud scratching in the audio touching various point in the audio and RF chain? You would think that would not be the case. 
Thoughts?
Jess AE0CW

On Apr 30, 2018, at 2:21 PM, Jess Gypin <ontarget1911@...> wrote:

I’ll do some more testing. I have several other QRP radios that I run on the same antennas as well as the BJ and none of the others exhibit this symptoms.

On Apr 30, 2018, at 12:38 PM, WA0ITP <wa0itp@...> wrote:

Jess, Sri I came late to the conversation.

Does the humm/buzz occur when running on a battery? 
That 60 cycle stuff could be riding in on your antenna too.  If so it's a neighborhood problem. 

In any event, it sounds like you might be a candidate for the BuzzKill  http://www.4sqrp.com/buzzkill.php
72 WAØITP
I love this radio stuff.
Back to the bench, Winter is too valuable to waste.
www.wa0itp.com
www.4sqrp.com
On 4/30/2018 1:06 PM, Jess None via Groups.Io wrote:
Gotcha will try

On Apr 30, 2018, at 11:06 AM, Don Pitchford <donw9ebk@...> wrote:

Jess,
I would start by looking at the output of the audio stage with your scope and see if an identifiable pattern shows up. Then move your hand around the board to see if shielding a certain point on the board affects the buzz. I have a LCD TV near the shack that generates a 12kHz pulse that can mess with receivers all the up through 10 meters. I have some Crickets and Pixies that suffer issues similar to what you describe if that TV is plugged in. A well shielded and grounded case fixed part of the problem,  and unplugging the TV fixed the rest.

On Mon, Apr 30, 2018, 10:43 AM Jess Gypin <ontarget1911@...> wrote:
Well,
I verified all components and placement on the board confirmed that all solder joints are good and no solder bridges or shorts.
I have confirmed that when the unit is powered up the oscillator is running. I get .9 or so Watts out. Transmit tone is clean. So having said all that, where do you all think I should start looking? I have not verified operation of the audio chain. A lot of the radios that I have built with a similar problem was a bad ground somewhere. I have a 25 KHz scope (yeah I know not enough band width) and a couple of good DVMs.

Jess AE0CW




Re: Cricket 30 loud buzzing

Jess Gypin
 

I have done some more testing and with my crummy little scope.

I have only run the radio on a 9 volt battery. I did some poking around. Touching the antenna center pin produces loud scratching in the audio. Attaching the ground of the scope probe increases the buzzing. Not really 60 cycle hum, but kind of like that. Sorta like the buzz you get when first plugging a guitar into the amp.
I know it is oscillating right, I can hear it on my FT817.
If I touch the scope probe to the side tone, I see a clean signal. If I touch the scope probe to the amplifier output on pin 8, I get in increase in buzz and the sound changes. Same thing on the input pin 4.
If I transmit with my FT817 into a dummy load, I can hear it LOUDLY in the Cricket. I hear no hiss or band noise on receive connected to an external antenna. Nothing but the buzz. It sounds like a path to ground killing the input sensitivity? But getting loud scratching in the audio touching various point in the audio and RF chain? You would think that would not be the case. 
Thoughts?
Jess AE0CW

On Apr 30, 2018, at 2:21 PM, Jess Gypin <ontarget1911@...> wrote:

I’ll do some more testing. I have several other QRP radios that I run on the same antennas as well as the BJ and none of the others exhibit this symptoms.

On Apr 30, 2018, at 12:38 PM, WA0ITP <wa0itp@...> wrote:

Jess, Sri I came late to the conversation.

Does the humm/buzz occur when running on a battery? 
That 60 cycle stuff could be riding in on your antenna too.  If so it's a neighborhood problem. 

In any event, it sounds like you might be a candidate for the BuzzKill  http://www.4sqrp.com/buzzkill.php
72 WAØITP
I love this radio stuff.
Back to the bench, Winter is too valuable to waste.
www.wa0itp.com
www.4sqrp.com
On 4/30/2018 1:06 PM, Jess None via Groups.Io wrote:
Gotcha will try

On Apr 30, 2018, at 11:06 AM, Don Pitchford <donw9ebk@...> wrote:

Jess,
I would start by looking at the output of the audio stage with your scope and see if an identifiable pattern shows up. Then move your hand around the board to see if shielding a certain point on the board affects the buzz. I have a LCD TV near the shack that generates a 12kHz pulse that can mess with receivers all the up through 10 meters. I have some Crickets and Pixies that suffer issues similar to what you describe if that TV is plugged in. A well shielded and grounded case fixed part of the problem,  and unplugging the TV fixed the rest.

On Mon, Apr 30, 2018, 10:43 AM Jess Gypin <ontarget1911@...> wrote:
Well,
I verified all components and placement on the board confirmed that all solder joints are good and no solder bridges or shorts.
I have confirmed that when the unit is powered up the oscillator is running. I get .9 or so Watts out. Transmit tone is clean. So having said all that, where do you all think I should start looking? I have not verified operation of the audio chain. A lot of the radios that I have built with a similar problem was a bad ground somewhere. I have a 25 KHz scope (yeah I know not enough band width) and a couple of good DVMs.

Jess AE0CW




Re: Wednesday Evening 40 and 80 meter Nets - Wed, 5/2/18 8:00pm-9:00pm #cal-reminder

ussv dharma
 

Cant make it after all...finally got maint to let me on the 8th floor roof...lots of corrosion on antenna fittings. took antennas down. and replacing them

If you don't change direction you WILL arrive exactly where you're headed!!
 
MSGT. Susan Meckley, USA (Ret.)
W7KFI-5  & AFZ4SM
 

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

On Wed, 5/2/18, main@4SQRP.groups.io Calendar <main@4SQRP.groups.io> wrote:

Subject: [4SQRP] Wednesday Evening 40 and 80 meter Nets - Wed, 5/2/18 8:00pm-9:00pm #cal-reminder
To: main@4SQRP.groups.io
Date: Wednesday, May 2, 2018, 4:00 PM

Reminder:

Wednesday Evening 40 and 80 meter Nets

When:


Wednesday, 2 May 2018

8:00pm to 9:00pm


(GMT-05:00) America/Chicago




Where:

40 and 80 Meters



Description:

The 40 Meter Net will be at 8:00 pm central or 0100 UTC on
7.122 +-.
NCS will be Bill KV6Z.

Wednesday
evening 80 Meter CW Net. will be at 0130 UTC Thursday
(8:30PM Central Time Wednesday). 
The net will be
called on 3.564 MHz +/- QRM.



Net
control operators are Johnny AC0BQ or Paul N0NBD.



View
Event.


Bayou Jumper--What a Hoot!

Clark WU4B
 

Just finished the BJ I bought at the end of 2017.  No, I'm not that slow, but could start on it until now.  

I've built several of the 4SQRP kits over the years and I have to say this is one of the highest quality kits you guys have done.  Some of the design features required someone to think in 3D--a quality I don't have.  The receiver is hot:  receiving 40m CW on a dummy load.  Transmitter output (measured by a QRPoMeter) was 4.75w.  But the best part is that this kit promises to be a blast to operate.  Can't wait to make Q's and tell people "Rig Hr is BJ" and have them ask "What??".  Final step: fitting it into the wood box from Hobby Lobby.  What a hoot to show at our next meeting of NOGA QRP here in Atlanta. 

Well done, guys.  


Wednesday Evening 40 and 80 meter Nets - Wed, 5/2/18 8:00pm-9:00pm #cal-reminder

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

Reminder:
Wednesday Evening 40 and 80 meter Nets

When:
Wednesday, 2 May 2018
8:00pm to 9:00pm
(GMT-05:00) America/Chicago

Where:
40 and 80 Meters

Description:
The 40 Meter Net will be at 8:00 pm central or 0100 UTC on 7.122 +-.
NCS will be Bill KV6Z.

Wednesday evening 80 Meter CW Net. will be at 0130 UTC Thursday (8:30PM Central Time Wednesday). 
The net will be called on 3.564 MHz +/- QRM.



Net control operators are Johnny AC0BQ or Paul N0NBD.

View Event.

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