[Heathkit] Additional, SB-1000, no 10 meteroutput

Ron Youvan ka4inm at gmail.com
Mon Jul 4 17:58:30 EDT 2016


On 07/04/2016 03:23 PM, Dave W5WP wrote:

> Apologies;

> The tube I found in the amplifier was / is a*4-125A*. Never trust an 80
> year old short term memory <g>

> Additional info: With the power off and caps discharged I keyed my bench
> test transceiver set at app. 20 watts output and with a scope at the
> filament choke at the 3-5400 socket end I manually keyed the antenna
> transfer relay.  Almost the full 20 watts (peak to peak voltage at
> 28.700 MHz appeared at the tube.

   If there is a 4-125A tube in the amplifier, the amplifier will not
work unless the amplifier has been modified to somehow supply a sizable
Voltage to the screen grid connection.  In GG service that may be only
mean grounding it, but "no connection" is not going to work very well.
-- 
   Ron  KA4INM - Youvan's corollary:
                 Every action results in unwanted side effects.


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