[TenTec] Corsair dying on TX- help, hints, please

[Jason Cooper]

John,
I was interested in which Corsair you have.  I am looking for a Corsair II.  I have never owned one but am looking for one to restore.  Unfortunately I cannot help you with your problem as I have never been into one.  I hope that you are able to get yours fixed.  If not, would you be interested in selling it?  I live in Sequim WA and so it would not be difficult to get it to me.
73s
Jason Cooper KN7AZ 
  ----- Original Message ----- 
  From: j_r_abercrombie<mailto:j_r_abercrombie at yahoo.ca> 
  To: tentec at contesting.com<mailto:tentec at contesting.com> 
  Sent: Monday, March 27, 2006 9:21 AM
  Subject: [TenTec] Corsair dying on TX- help, hints, please


  An eBay buy, it worked OK for a day or so, and I made
  a few QSOs on 20m SSB with it. 
  Then it started showing 'funny' behaviour on TX. (All
  symptoms below are with radio in the "lock"/tuneup
  position, into a Cantenna-type 1kw dummy load. All the
  cabling, dummy, power supply etc work fine with a
  TenTec Omni here, so I'm quite sure it is the radio-
  not a PS, or cabling problem).
  First, intermittent, pulsing-type draw on the power
  supply 15-20A range when putting out full power in the
  'lock' position. Drive control advanced till ALC lit.
  This evolved into output power dropping down to a few
  watts after 30 sec or so of TX. 

  Now, whenever the drive control is advanced to give
  more than a few watts of output power (Ic of 3 amps or
  so), the radio shuts down completely. Power off-power
  on and RX is fine again, but TX still shows the same
  symptoms.

  I don't know if this is something in the SWR sensing
  board, or in the RF PA or what. Should I be looking
  for a blown cap? My expertise is generally limited to
  simpler repairs.

  I'd appreciate any ideas/advice on this. The rig is
  probably not worth shipping (from Canada) to TN for
  repairs, but it seems too nice to become a 'parts rig'
  just yet.
  Thanks.
  73
  John
  VE7JAV



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