[Kenwood] Weird happening on TS-850

Fri Nov 28 15:45:14 EST 2008

 
I've looked at a few of the suggestions that were given. Key down power in
CW does not fluctuate at all. Output voltage from my Astron RS-35A power
supply is showing 13.7v during either key down or rx.
So now it's obvious to me that it's during SSB. Tim, NO0C, brought the
obvious observation about no modulation between words, no power. He's right
about that. But what I'm experiencing is a drop-off during modulation and
usually a let go of the PTT and a rekey will bring it back.
The symptoms point to the DC/DC converter but would a bad, or going, one
effect only one mode? 
Ed KU4BP
-----Original Message-----
From: avvidclif at wildblue.net [mailto:avvidclif at wildblue.net] On Behalf Of
Clif
Sent: Friday, November 28, 2008 11:56 AM
To: Ed Swiderski, KU4BP
Subject: Re: [Kenwood] Weird happening on TS-850
Sure, key it down in CW mode and see what happens. I'll bet the power
fluctuates up and down. If so the DC/DC converter needs to be changed and a
few caps. Also low voltage can cause it also. You should have 14v to the
back of the radio in key down tx.
Clif
On Fri, Nov 28, 2008 at 7:37 AM, Ed Swiderski, KU4BP <ku4bp at triad.rr.com>
wrote:
>> Hello all,
>> Over the last couple years I've noticed a weird thing going on with my 
> TS-850. During transmission in SSB I normally have an eye on my meters 
> showing power out and SWR. Been noticing during this time that my 
> output will drop down to zero sometimes between words or phonetic 
> signings of my call. Started to notice it when using my Heil headset 
> using VOX and other stations were telling me I was breaking up.
>> At first I thought it was maybe the VOX settings so I adjusted them. 
> Problem remained. Then I looked at the adapter and noticed a loose
conection inside.
> Fixed that and the problem remained. Checked the mic element in the 
> headset and it was OK. No loose connections. So I unplugged the 
> headset and plugged in my desk mic, a Shure 444 which I have used for 
> years. Problem is still there. Went back to both mics and reset my 
> compression and ALC settings on each according to the manual but I'm 
> still getting a cutoff problem. It's intermittent on both but still 
> very aggravating. I'm thinking that maybe the next thing to check would
the mic connector on the rig itself.
>> Has anyone else run into a problem like this? If so, what did you have 
> to do.
>> Open to any other possiblities to check.
>> Thanks,
> Ed Swiderski KU4BP
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--
Clif Holland KA5IPF
www.avvid.com