On Fri, 16 Oct 1998 22:34:34 EDT TOMK5RC@aol.com writes:
>
>MLA2500 puts out what sounds like a T8 signal (AC) in the CW position,
>but
>sounds okay in the SSB position. Any theories?
>
>Also regularly pops the 1/2 watt resisitor at the base of the RF
>choke.
That was Dentrons version of a glitch resistor Tom. 1 Ohm at 1/2W.
Sounds like an 8875 problem and the hum is just not noticable on SSB. Try
it with 1 tube at a time and reduced drive, see if it follows one tube.
I would suspect an intermittent filament-cathode short. Also make sure
the plate blocking cap is not breaking down.
GL Carl KM1H
>
>Tom, K5RC/7
>
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>
>
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