[Amps] 30S-1 Questions

[Gary Smith]

Take care of the relays, sounds like previous owner didn't like the time delay idea.
If you think that amp is loud, find a Ameritron AL-800H, sit near it for a few minutes. I sold mine due to the "bearing down on me" sound of that fan and air noise that accompanied it.
The S-one is a great amp. Truly linear, 10 db gain across the bands.
Gary... wa6fgi 
  ----- Original Message ----- 
  From: Cecil Acuff 
  To: amps at contesting.com 
  Sent: Saturday, January 30, 2010 7:44 AM
  Subject: [Amps] 30S-1 Questions


  Hi Folks,

  I have had the good fortune to have a near mint 30S-1 given to me.  It is a 
  real piece of art for sure.  All original and reported to only have around a 
  150 hrs. of operation on the clock.  Still sporting the plastic on the front 
  door of the power supply.

  I cleaned it up and gave it a serious visual and found a jumper in the 3 
  minute time delay relay socket.  Had a new one so I fixed that.  Amp came 
  with a spare tube, a pull stamped as having 1000 hours on it so I assume it 
  was a military pull. (4CX-1000A)

  I have read for years how quiet the cooling systems are in these things and 
  all I have read is true.  But if this amp is typical, all that design was 
  wasted because the loudest thing is the HV power supply buzz...not the 
  fan/cooling system.

  Is this typical for these amps.  With no load it's noisy...under load it 
  quiets down a good bit but is still audible.  I really expected that part to 
  be pretty much silent.

  Any history or experience on quieting this thing down would be helpful.

  Otherwise I love the amp.

  I get around 700w out on CW on 400ma and 1kw on voice peaks on my bird 43 
  with 300ma peaks on the Plate meter.  Never a sign of grid current.  Not 
  pushing it too hard.

  Thanks..

  Cecil Acuff
  K5DL



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