[ARC5] Receiver current drain

J. Forster jfor at quik.com
Thu Jan 6 09:22:37 EST 2011


Hi Ken,

I'd be inclined to go a few volts higher on the diode string, so the
Zeners are not turned on when the radio is operating.

Best,

-John

=============




Further testing revealed the following:
>
> With a 10K resistor across the power supply output, B+ is 242.2 VDC,
> current drawn is 23 mA.
>
> So, I have elected to connect two 5 watt series-connected Zener diodes
> across the output: a 120 VDC and a 130 VDC. Such a load will draw less
> than 20 mA, for a total power dissipation of 5 watts across the 10 watt
> Zener
> load.
>
> The Zeners cost $.0.54 each. So, for a little more than $1.00 and a bit of
> time, I have my problem solved.
>
> T'anks, youse guys! :-)
>
> Ken W7EKB
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