[Milsurplus] Power Supply Requirments for the RBM HF Receiver

[Ian Wilson]

Hi Terry,

There are 11 (if I counted correctly) 12.6V 0.15A octal tubes.

So a 12.6V 2A supply would seem to be the heater supply
requirements.

Guesstimating 15mA for each of the RF/IF pentodes and 35mA
for the 12A6, I would think that 200mA @200V would do OK for the
B+ supply.

I have the MF version of this, works nicely. I don't recall having to
do anything unusual regarding power supplies.

I don't have anything except the schematics as far as I can tell.

73, ian K3IMW



On Tue, Aug 19, 2014 at 3:15 PM, T. Comstock via Milsurplus <
milsurplus at mailman.qth.net> wrote:

> I picked up what I believe is a RBM HF Receiver this past weekend, someone
> along the way removed the nameplate
> and installed a meter.  Because the knobs don’t include the large letters,
> I believe that I have a RBM unit, is there a
> way to tell which flavor or model I ended up with?
>
> Using the info from the RBS documentation found on line (no luck with more
> than a schematic for the RBM), I found
> the power connector pin out and the need for 12.5V and 215V but not sure
> on the current requirements for
> both voltages.
>
> Any help would be appreciated, and if someone might know where I can find
> a nameplate when I make an effort to
> attempt a restoration (there is a fear that the hole is too large to cover
> with the original nameplate).
>
> Thanks,
> Terry
> W7CJ
>
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