[Collins] KWS-1 PA current

[Fern Rivard]

Hi Keith:
    You didn't mention as to which band you had the KWS-1 on but if it 
was on 75 meters, I would suspect that it has the famous parasitic 
oscillation that was common on all of those kws-1 transmitters.
    Cheers from Fern   VE7GZ


----- Original Message ----- 
From: "Keith Sorensen" <radiorm1 at comcast.net>
To: <Collins at mailman.qth.net>
Sent: Tuesday, November 28, 2006 11:17 PM
Subject: [Collins] KWS-1 PA current


Hello to all,
I am currently bring up a KWS-1 serial 0071.  I have a situation with 
the initial set up, when going from STBY to CW the PA current will peg 
and HV fuse will blow with in seconds.  I have done all the initial 
checks for low voltage supply bias -39 to -96vdc, screen at 350vdc and 
low VDC running at 300VDC, 25 vdc high.  I have installed new caps as 
decribed in the "deadly caps" tip.  rebuild the final and dropped in new 
7580W, and added the service bulletins. The 2KV supply holds up fine 
until the "operate/tune switch is in the operate position and moved to 
CW. I get no screen, ALC, or Bias reading on the panels multimeter  When 
in the tune position the PA current rises slower but will still peg. 
Any tips would be a great help.  I am a new member and this is my first 
request for help from the pro's at CCA. I really want to put this old 
beauty on the air.

Keith KE7GPO
______________________________________________________________
Collins mailing list
Home: http://mailman.qth.net/mailman/listinfo/collins
Help: http://mailman.qth.net/mmfaq.html
Post: mailto:Collins at mailman.qth.net



-- 
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.1.409 / Virus Database: 268.14.19/556 - Release Date: 
11/28/2006