[BC] Re: Oldest Transmitter still in daily service

[Lewis Munn]

Phil,
   
  Still got a 6BG6 aduio board pullout from the 1-T at one pla i work!
   
  I liked the old 2-case 1F...room to work inside.  Great drive levels...drove the 833-A's to 225 ma, and that allowed humongous modulation levels with very low distortion.  And the RF driver tube lasted 5 years typically.
   
  The 1-T even with 807's has been typically marginal on drive to the PA's, resulting in problems at times making good clean positive modulation.  Also, tube life with 807's is bad, everyone I have seen.  Tho the Chinese do not do a good job making 807's either!
   
  RF drivers used to last not more than 6 months, and audio drives about 8 months, with the American tubes.  2-3 months with Chinese tubes.
   
  Currently I have gone to Penta 5933 tubes for the best life...now back to the old 807 life in general in the transmitters I have supported.
   
  In another area, KBOI in Boise, ID has a very old transmitter...which I was told still can run,  tho I think it is currently disconnected, if the modern group ownership has not scrapped it.  Museum piece!
   
  Looey Munn
  Rondup, MT
   
  Phil Alexander <dynotherm at earthlink.net> wrote:
  On 11 Dec 2005 at 22:03, Jerry Mathis wrote:

> But the RF and AF circuitry was excellent. Plenty of drive was designed into 
> the transmitter, so you could get more life from the tubes than the Harris 
> boxes.
			
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