Date   

Re: Finished my Nouveau 75, hum on transmit audio!

John P Lloyd
 

Yes sir!
That was on my list of things to try.
Thanks!
John

On Thursday, November 21, 2019, 2:23:01 PM EST, John Lonigro <jonigro@...> wrote:


John:
Do you by any chance have a 12 volt gel-cell or a cigarette lighter plug for your car that you can temporarily power the radio with?  If you run the radio off D.C., and the hum is still there, you can eliminate any power supply issues.

72 and good luck,
John, AA0VE

On 11/21/19 12:54 PM, John P Lloyd via Groups.Io wrote:
Hi Bob,

The hum is there regardless.

Thank you for the information on keying the rig!
73, John W4JPL

On Thursday, November 21, 2019, 12:04:43 PM EST, w9ran <w9ran@...> wrote:


On 11/21/2019 9:00 AM, John P Lloyd via Groups.Io wrote:
> Putting it on an antenna has the same result with the hum.

John -

So are you saying the hum is still present on the dummy load?  Or only
when used on an antenna?

73, Bob W9RAN

PS:   There is not a separate PTT line as in most radios, the N-75
detects the change in voltage that occurs when the mic PTT switch is
closed.  To key the radio w/o the mic you'll need a 4-circuit TRRS plug
- short the sleeve and first ring together.






Re: Finished my Nouveau 75, hum on transmit audio!

John Lonigro
 

John:
Do you by any chance have a 12 volt gel-cell or a cigarette lighter plug for your car that you can temporarily power the radio with?  If you run the radio off D.C., and the hum is still there, you can eliminate any power supply issues.

72 and good luck,
John, AA0VE

On 11/21/19 12:54 PM, John P Lloyd via Groups.Io wrote:
Hi Bob,

The hum is there regardless.

Thank you for the information on keying the rig!
73, John W4JPL

On Thursday, November 21, 2019, 12:04:43 PM EST, w9ran <w9ran@...> wrote:


On 11/21/2019 9:00 AM, John P Lloyd via Groups.Io wrote:
> Putting it on an antenna has the same result with the hum.

John -

So are you saying the hum is still present on the dummy load?  Or only
when used on an antenna?

73, Bob W9RAN

PS:   There is not a separate PTT line as in most radios, the N-75
detects the change in voltage that occurs when the mic PTT switch is
closed.  To key the radio w/o the mic you'll need a 4-circuit TRRS plug
- short the sleeve and first ring together.






Re: Finished my Nouveau 75, hum on transmit audio!

John P Lloyd
 

Hi Bob,

The hum is there regardless.

Thank you for the information on keying the rig!
73, John W4JPL

On Thursday, November 21, 2019, 12:04:43 PM EST, w9ran <w9ran@...> wrote:


On 11/21/2019 9:00 AM, John P Lloyd via Groups.Io wrote:
> Putting it on an antenna has the same result with the hum.

John -

So are you saying the hum is still present on the dummy load?  Or only
when used on an antenna?

73, Bob W9RAN

PS:   There is not a separate PTT line as in most radios, the N-75
detects the change in voltage that occurs when the mic PTT switch is
closed.  To key the radio w/o the mic you'll need a 4-circuit TRRS plug
- short the sleeve and first ring together.





Re: Finished my Nouveau 75, hum on transmit audio!

w9ran
 

On 11/21/2019 9:00 AM, John P Lloyd via Groups.Io wrote:
Putting it on an antenna has the same result with the hum.
John -

So are you saying the hum is still present on the dummy load?  Or only when used on an antenna?

73, Bob W9RAN

PS:   There is not a separate PTT line as in most radios, the N-75 detects the change in voltage that occurs when the mic PTT switch is closed.  To key the radio w/o the mic you'll need a 4-circuit TRRS plug - short the sleeve and first ring together.


Re: 40 M 80M and DMR net report

Paul Goemans
 

No trace of the 40 meter net here in south central WI!
WA9PWP

Sent from Pauls iPhone

On Nov 20, 2019, at 9:32 PM, Johnny Matlock <jomatlock@...> wrote:

Ge group
Well 40 meters was weak at its best!
Check in's on 40 meters were:
KD0WF
and a partial call?
possibly WB0QQT?

80 Meters was a lot better.
Check in's were:

WA9PWP PAUL
NK80 CHARLES
WN0WWY DALE
and
WB0QQT

We had some qrm from the NA sprint so I moved up to 3.564.5 to avoid the qrm.

Check in's for the DMR net were:
WA9BNZ BILL
N0TGR DICK
NK8O CHARLES
WA8NWA MIKE
N9OJR ERIC
N9PUZ TIM
WW9H JIM
WG5F ED
K0EMT BRIAN
KC0IFQ DENNIS

Thanks for the check in's everyone, I hope you have a wonderful and
safe Thanksgiving!
73
Johnny AC0BQ



--
QRP....."More smiles per Watt"
72
JOHNNY AC0BQ ..



Re: Finished my Nouveau 75, hum on transmit audio!

Duane Brayton
 

Sorry, I got the other msg first.  In that case mic cord shielding & rf feedback are possibilities. Keying the transmitter without mic attached should resolve that question quickly. You should be able to easily determine the keying line at the mic cord Jack and apply a temporary ground while checking the rf waveform. Let us know how that goes.
Duane KE0IUV

On Nov 21, 2019, at 10:00 AM, "John P Lloyd via Groups.Io" <yahoo.com@groups.io target=_blank>w4jpl=yahoo.com@groups.io> wrote:
Hello Bob,
I have tried it on 3 power supplies, in fact. One on my workbench (a switcher) and the other two are 50 amp astron's that I use everyday in the shack.
I always troubleshoot into a dummy load with a watt meter in line.
Putting it on an antenna has the same result with the hum.
The voltage from the PS's is 13.8.

I'm going to look into it a bit more this weekend, and let  you know if I come up with anything, especially about the power output.

Thanks for  replying!
John


Re: Finished my Nouveau 75, hum on transmit audio!

Duane Brayton
 

How are you powering the radio & could you have a ground loop?  Is your mic cord shielded? Check these items first. 
Duane KE0IUV

On Nov 21, 2019, at 9:52 AM, "John P Lloyd via Groups.Io" <yahoo.com@groups.io target=_blank>w4jpl=yahoo.com@groups.io> wrote:
Hello Dwayne,
I'm using the handheld mic that comes with the kit.
What I have to figure out is how to key the rig without the mic, which I will do probably this weekend.
This way I can eliminate the mic as a possible problem.


Re: Finished my Nouveau 75, hum on transmit audio!

John P Lloyd
 

Hello Bob,
I have tried it on 3 power supplies, in fact. One on my workbench (a switcher) and the other two are 50 amp astron's that I use everyday in the shack.
I always troubleshoot into a dummy load with a watt meter in line.
Putting it on an antenna has the same result with the hum.
The voltage from the PS's is 13.8.

I'm going to look into it a bit more this weekend, and let  you know if I come up with anything, especially about the power output.

Thanks for  replying!
John


Re: Finished my Nouveau 75, hum on transmit audio!

John P Lloyd
 

Hello Dwayne,
I'm using the handheld mic that comes with the kit.
What I have to figure out is how to key the rig without the mic, which I will do probably this weekend.
This way I can eliminate the mic as a possible problem.


Re: 40 M 80M and DMR net report

Tim N9PUZ
 

40 Meters was changing quickly last night. I worked a station in RI from Illinois earlier and then could not even here any of you on 40 at net time.

Tim N9PUZ


On Wed, Nov 20, 2019 at 9:32 PM Johnny Matlock <jomatlock@...> wrote:
Ge group
Well 40 meters was weak at its best!
Check in's on 40 meters were:
KD0WF
and a partial call?
possibly WB0QQT?


Re: Finished my Nouveau 75, hum on transmit audio!

Charles W. Powell
 

Mine is somewhere around 3 watts dead key as well.

72,

Chas - NK8O

On Nov 20, 2019, at 5:50 PM, w9ran <w9ran@...> wrote:

On 11/20/2019 2:10 PM, John P Lloyd via Groups.Io wrote:

Can anyone give me some advice on troubleshooting the audio hum issue?
John, First off I'd check your power supply. A scope would be the best tool but if you have a different supply that you could try, that should verify. The next thing is a possible ground loop - if you can, try a battery or disconnect the antenna and put the N-75 on a dummy load that is not grounded.

Your output does sound low - mine has about 3 watts resting carrier and when I posed the question a while ago no one replied to say they were getting 5 watts unmodulated carrier output. The power supply voltage could easily make up the difference, mine is running at 13.5VDC.

73, Bob W9RAN




Re: Nouveau 75

Charles W. Powell
 

Thanks for the information Bob.  I have heard a lot of activity on 75m AM because I often just turn on the radio when I'm in the shack.  I'll have to pull out the Hardrock 50 if I really want to be heard.  The HR-50 should be fine because you can over-drive it beyond its specifications and the only worry is overheating.  As long as you watch the temp, it will be fine.  I think it's pretty heavily under-spec for what the finals can do.  

I figure that most of the stations won't hear me even if I try running barefoot.  I was surprised that Johnny and I couldn't work this evening because he was S9+20 on the CW net.  But then that's the difference between CW and AM.  I think it also might help if I put up a true NVIS antenna, like a horizontal loop in the back yard.  I have just enough room, so it's a matter of putting up some supports.  Anyway, the N-75 has been a surprisingly fun little project.

73, Charles NK8O


40 M 80M and DMR net report

Johnny AC0BQ
 

Ge group
Well 40 meters was weak at its best!
Check in's on 40 meters were:
KD0WF
and a partial call?
possibly WB0QQT?

80 Meters was a lot better.
Check in's were:

WA9PWP PAUL
NK80 CHARLES
WN0WWY DALE
and
WB0QQT

We had some qrm from the NA sprint so I moved up to 3.564.5 to avoid the qrm.

Check in's for the DMR net were:
WA9BNZ BILL
N0TGR DICK
NK8O CHARLES
WA8NWA MIKE
N9OJR ERIC
N9PUZ TIM
WW9H JIM
WG5F ED
K0EMT BRIAN
KC0IFQ DENNIS

Thanks for the check in's everyone, I hope you have a wonderful and
safe Thanksgiving!
73
Johnny AC0BQ



--
QRP....."More smiles per Watt"
72
JOHNNY AC0BQ ..


Wednesday Evening 40 and 80 meter Nets - Wed, 11/20/2019 #cal-notice

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

Wednesday Evening 40 and 80 meter Nets

When:
Wednesday, 20 November 2019
8:00pm to 9:00pm
(GMT-06:00) America/Chicago

Where:
40 and 80 Meters

Organizer:
jomatlock@...

Description:
The 40 Meter Net will be at 8:00 pm central time  on 7.122 +-. QRM
NCS is WQ5RP Operator to be determined.

Wednesday evening 80 Meter CW Net. will be at  (8:30PM Central Time Wednesday). 
The 80 meter net will be called on 3.564 MHz +/- QRM.
Net control operators are Johnny AC0BQ or Paul N0NBD.

* NEW *  Wednesday evening DMR Voice Net will be at (Thursday) 0300 UTC (9:00PM Central Time Wednesday/)
Four States QRP has a Brandmeister DMR Talk Group (TG31654). Join us to discuss QRP, ask questions, or just ragchew. The Wednesday net is a directed net  but any other time you may use the Talk Group to chat with other QRPers.
Net Control operator is Bert NØYJ.


Re: Nouveau 75

w9ran
 

On 11/20/2019 7:24 PM, Charles W. Powell via Groups.Io wrote:
I called for about 10 minutes but nothing heard.
Charlie, if you're around check 3880 next Wed. night starting at 5PM your time, for the Mighty Elmac Net.    Net control is WA6GYC out of the Detroit area and you should be able to hear him at least until the band goes long.   It was fading after about 1/2 hour when I checked in with my Nouveau 75 aided by a single sweep-tube amplifier running about 20 watts carrier, but Rex heard me better than I was hearing him at the time.   He just got his N-75 kit so there will be others on the net soon.

The Elmac net has moved up a couple of hours due to 75 meter propagation, but meets each Wed. on 3880 except the first Wed. of the month when the Collins Collectors AM Net take over, and you'll get to hear lots of "tall ship" AM stations then.

73, Bob W9RAN


Re: Nouveau 75

Charles W. Powell
 

I have the Hilltopper 40 out for 40 meters tonight but I suspect it will be quite long.  The bands have been pretty exceptional today - I picked up several 10 DX stations, and had a little rag chew with two different stations on 60m in the middle of the afternoon.  First on Channel 1 and the second o Channel 2.  But we shall see how it goes.


Re: Nouveau 75

Johnny AC0BQ
 


I was listening Charles.
The guys up at 3885 pretty well had me covered up at 3875.
Man they are sure strong?

40 was really long last night during the fox hunts, I worked CA.

Cu all at 8:00 8:30 and 9:00.
I am the only lonely NCS tonight!
72
Johnny AC0BQ 


On Wed, Nov 20, 2019 at 7:24 PM Charles W. Powell via Groups.Io <doctorcwp=yahoo.com@groups.io> wrote:
I called for about 10 minutes but nothing heard.  There are some adjacent SSB stations below and other AM stations above.  I wonder how we will do on CW net tonight?  Band could be long.  We shall see.

72,

Chas - NK8O

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


Re: Nouveau 75

Charles W. Powell
 

I called for about 10 minutes but nothing heard.  There are some adjacent SSB stations below and other AM stations above.  I wonder how we will do on CW net tonight?  Band could be long.  We shall see.

72,

Chas - NK8O


Re: Nouveau 75

Johnny AC0BQ
 

Ge Charles 
In listening.
I have strong stations right above me 
73
Johnny AC0BQ 

On Wed, Nov 20, 2019 at 6:45 PM Charles W. Powell via Groups.Io <doctorcwp=yahoo.com@groups.io> wrote:
If anyone wants to try out their Nouveau 75  I will be listening at or around 3875 kHz at 1900 Central time (0100 UTC).  Short notice but let’s give it a try.

72,

Chas - NK8O


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


Nouveau 75

Charles W. Powell
 

If anyone wants to try out their Nouveau 75 I will be listening at or around 3875 kHz at 1900 Central time (0100 UTC). Short notice but let’s give it a try.

72,

Chas - NK8O