[JMS] 90281 power supply?

[Don Buska]

Hi Cal,

Rare yes!  Can it supply both modulator and transmitter?  Yes easily, except LV and 
bias.  You also ask in an email about modulator bias voltage requirements.  The P-P 
6146 modulators use a -45VDC (-C) bias.  The transmitter uses -65V bias.  You can see 
the whole power supply wiring diagram in the Station Setup article on the JMS website.  
Some use 9V batteries in series for the bias which is fine and a simple zener 
regulated voltage divider is easy to construct too.

73

Don N9OO



On Fri, 7 Nov 2003 16:10:01 -0800 (PST), kwylow zinjanthropus wrote:

>
>I suspect this is a rare-bird but how available are they? If I can't get a hold of 
one, I will homebrew my own. Can the 90281 supply both the modulator and the 90800 
transmitter? Thanks. Cal, N6KYR. 
>
>
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