[Amps] AL-80B "Optional" Grid Protection circuitry - identify?

[Gary Smith]

Were you overdriving the amp? You can use the amp without the alc hooked up, but you do have to watch the power input level.
My suggestion is to tune with a low input power level then raise the drive until no more increase in power is seen.
How is the vswr?  1.5:1 or better?
Just a couple of ideas.
Take time to note in the manual under tuning, you should peak the load control for max power then increase the loading (clockwise) until the power drops off just a tad.
Don't have any ides on the gird protection scheme tho,
Ring up ameritron and the will tell you.  I have found them to be very helpful and informative.
73,
Gary 
WA6FGI


  
  ----- Original Message ----- 
  From: Charlie 
  To: AMPS mailing list 
  Sent: Monday, January 17, 2005 4:48 PM
  Subject: [Amps] AL-80B "Optional" Grid Protection circuitry - identify?


  The AL-80B manual and web site discuss an "optional' grid protection board I 
  believe they call it. I am the new owner of a used AL-80B and would like to 
  know how I can check if this "optional ' grid protection is in place or not. 
  As best I can tell this amp was new in 1997.

  I have several photos of the inside on my site listed below. If anyone can 
  spot it or tell me what to look for I would be very appreciative. I got on 
  this matter after the amp kicked off a couple times on 40M phone.  After 
  several moments it was OK again. I am guessing it was this optional circuit. 
  TY  73

  Charlie
  Ham Radio - AD5TH
  www.ad5th.com






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