The AM Forum
March 28, 2024, 07:52:32 PM *
Welcome, Guest. Please login or register.

Login with username, password and session length
 
   Home   Help Calendar Links Staff List Gallery Login Register  
Pages: [1]   Go Down
  Print  
Author Topic: Viking Valiant with " Chicken CW tone"  (Read 9540 times)
0 Members and 1 Guest are viewing this topic.
xe1yzy
Member

Offline Offline

Posts: 348


« on: August 14, 2006, 01:26:05 PM »

Hello guys...

This morning I make a CW QSO  with my Viking Valiant, I was pulling out 200 watts, so I Plug the straight key and start to call "cq" on 40 meters, some guy in Texas answer my call, and give me a RST of 593!!  Roll Eyes, then, any idea to improve the cw tone?

TNX in advance!

Pedro XE1YZY

Logged

TVI WHAT TVI?
Ed-VA3ES
Member

Offline Offline

Posts: 593



« Reply #1 on: August 14, 2006, 02:33:56 PM »

What's the CW tone like? Chirp?  Hum?   Raw AC?  Need to hear your tone, before you can fix it.
Logged

"There ain't a slaw-bukit inna worl, that kin jam me!!"
xe1yzy
Member

Offline Offline

Posts: 348


« Reply #2 on: August 15, 2006, 12:32:53 PM »

Hi Ed.

Off course I hear the tone!, yes is kind of chirp, the interesting thing , is only on 40 meters, in 20 the tone sound good, so im start to check the VFO.

Regards

Logged

TVI WHAT TVI?
The Slab Bacon
Member

Offline Offline

Posts: 3934



« Reply #3 on: August 15, 2006, 01:10:53 PM »

Pedro,
         Check the bandswitch inside the VFO. My ranger occasionally wobbles in frequency. When I rock the bandswitch the problem dissapears. You might try cleaning the bandswitch inside the VFO box. If you jogg the switch back and forth and the problem goes away, you know what you gotta do.
                           
                                                                    the Slab Bacon
Logged

"No is not an answer and failure is not an option!"
Jim, W5JO
Member

Offline Offline

Posts: 2506


« Reply #4 on: August 15, 2006, 07:08:43 PM »

Johnson equipment are notorious for chirp.  If it is just chirp, I wouldn't worry about it much.  But if there is hum on the signal then go looking. 
Logged
K1JJ
Contributing
Member
*
Offline Offline

Posts: 8893


"Let's go kayaking, Tommy!" - Yaz


« Reply #5 on: August 15, 2006, 07:47:12 PM »

some guy in Texas answer my call, and give me a RST of 593!!  Roll Eyes, then, any idea to improve the cw tone?

Pedro,

If the guy's RST report was accurate, then the 593 would indicate a rough note, probably due to power supply filtering or leaky VFO tube, etc..   But if you had a chirpy signal and clean note as you say you hear, the report should have been:  " 599C "....    But maybe it's a combination, " 593C"  ....  Grin

Either way, you can hear it yourself in your own receiver to fix it.  Based on the symptoms, it does sound like a dirty bandswitch in the vfo area..

T
Logged

Use an "AM Courtesy Filter" to limit transmit audio bandwidth  +-4.5 KHz, +-6.0 KHz or +-8.0 KHz when needed.  Easily done in DSP.

Wise Words : "I'm as old as I've ever been... and I'm as young as I'll ever be."

There's nothing like an old dog.
xe1yzy
Member

Offline Offline

Posts: 348


« Reply #6 on: August 15, 2006, 09:00:02 PM »

 Grin Its fixed...

Thanks a lot guys, yup a dirty band switch was the cause, a good deoxit bath solve the problem, im also found some interesting information in BAMA, about some factory tips to fix some problems with the cw tone, yes  now is not a" Stradivarius"
but is not bad for a Viking Valiant...

very best regards to all

Pedro
Logged

TVI WHAT TVI?
w5gw
Member

Offline Offline

Posts: 77


« Reply #7 on: May 24, 2011, 04:31:38 PM »

Do you have a link to the tips for curing the chirp?

thanks - Gary - W5GW
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
 AMfone © 2001-2015
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Page created in 0.118 seconds with 19 queries.