[MRCG] homebrew GRC-9 power supply questions

[Jason W6IEE]

I posted this to the ANGRY-9 list, but being as there's very little traffic
over there, I want to ask here also.

I have a Lewyt AN/GRC-9 but no power supply!

Having quite a bit of vintage junk, I'm going to try to build a power
supply as can be seen here:

www.vmarsmanuals.**co.uk/newsletter**_articles/**angrynine_**2.pdf

First issue, the plug I have has no pin #58. As I understand it, this is my
receiver B+ on receive. Should I just jumper 57 and 58 on the radio?

Next, I'm having a bit of difficulty understanding the purpose of the
OC3/VR-105 gas-tube regulator for the 105V line. As I understand it, that
tube won't even "strike" until 135V goes through it. Is the purpose of this
tube only in the event an excessive voltage is put on this line?

Since I don't have a 105-0-105V transformer, I'm wondering if I could feed
that line with ~135V, instead of 105, with the appropriate resistor? (back
to back wall wart transformers
would likely be more in this voltage range) My other option is a big bag of
33V zener diodes, I could make a 99V zener regulator. This should be ok,
(right??) as I've run the receiver in the past with 90V worth of 9V
batteries. (and yes, my bias battery is dead, coming up with a strategy to
replace with button cells)

Lastly, my final B+ supply is going to come out to be around ~550V instead
of 500. Will this be OK? Sure, the 2E22 is rated at 600V max, but will the
screen voltage end up in an acceptable value?

I am aware of the scarcity and short life of the 2E22, I have a few of what
I believe are NOS spares.

Of course, I'd much rather obtain a DY-88, but I haven't won the lottery
yet. ;)

Thanks,
Jason W6IEE

-- 
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