[Milsurplus] Lowering Receiver B+, Again.

[Hubert Miller]

I have been interested in this topic since reading Bro. Stinson's first intriguing postings about his Command Sets experiment years ago.
I was very intrigued to read in my National HRO-60 manual, and other manuals, about battery operation of the receivers with, typically,
135 volts B+ instead the normal around 250 volts. No caveats were given regarding impaired operation of any way except that the 
voltage regulator tube would not strike ( conduct. ) 

I have a couple mil-surplus transmitter-receivers which use a B+ i consider scarily high. The Navy MBM has around 280 volts on the
6SK7,  6SA7 era tubes. In this equipment however the rec B+ is dropped via a large resistor from the 350 volt transmit B+. Neither the
high receiver B+ or the heat generated by this dropping resistor strikes me as an attractive feature. I do want to maintain the equipment
in original state however so the only solution i can think of is to jumper the resistor and use one B+ of say 225 volts for both receive and
transmit and just live with the decreased transmit power. That is, if i ever get around to this project.

I'm also very interested in transistorizing some old equipment but before you gasp with horror let me say, the ground rule would be via
a plug-in direct replacement for tubes. For your HRO you can find at the hamfest your 6SK7, 6D6, etc. all morning long for around $2 each
but if you have say, a European receiver, someone wants $25-30-or more for a similar tube but with an incompatible base and an EF-- type
or RV-------  name.
-Hue