[Milsurplus] BC-9 Loop Test: Scratching My Head.

[Kenneth G. Gordon]

On 11 Feb 2017 at 19:44, Richard wrote:

> 
> I think someone said the last change was higher voltage on transmit.  Some dim bulb who knew a 
> thing or two, but not enough, probably proposed it for more output, and it was accepted by a 
> supervisor who knew less.  I've seen this happen on big electrical equipment, with disastrous 
> results.
> Richard, AA1P

Good thinking.

So, if David dropped the 120 V feed to 60 volts (which is the maximum rated plate voltage 
for a VT-1) then removed the capacitor and 100 K resistor, replacing them with a piece of 
wire, the system may work correctly?

Hmmm.....well, I don't see it. The "oscillating detector" will be oscillating at the same level of 
output in either case, it seems to me.

THe only thing the key would be doing is bypassing the meter and the audio stages by a bit.

David?

Ken W7EKB

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