On Jul 2, 3:52 pm, K3HVG wrote:
Just to make doubly certain, I re-loaded the above ref manual on BAMA
and compared it with my original AN-16-40BC224-2 dated 20 JULY 1945.
The ref des for the regulator is 125. In the BAMA manual, its located
on the last schematic sheet part and in the parts list as 2V991.

Jeep/K3HVG



K3HVG wrote:
OK, Roger... I checked with the site again and your receiver, the "R"
model is listed as one of two manuals included. Please have a closer
look, under TO 12R2-3BC-112.pdf
The manual cover sheet and contents clearly state the "R" model.

Jeep/K3HVG- Hide quoted text -

- Show quoted text -

Many thanks... and to other posters and emailers, too.
I have retrieved the "R" schematic! Now the harder work starts...
My plan is to keep it as original as possible but find a way to take
the dynamotor "off line" (to preserve it in the radio for "all
time"... and to cut the mechanical noise), then run the B+ from an
external regulated tube supply and the heaters from an external 4 x
6.3 = 25.2 VDC supply - I can adapt of my 28 VDC dynamotor supply,
but now only 0.7 A total. I'll go the other side of resistor "76-A"
that appears to drop 28 - 25.2 = 2.8 volts for the series/parallel
heater group (resistor "76-B" accommodating the higher (0.4 A) 6K6GT
heater current.) On second thoughts, the 25 volts could now be AC,
even easier (perhaps using a recycled s/s receiver power transformer)
- the 28 VDC supply staying untouched for "dynamotor days"!
Very best,
Cheers,
Roger

"Reclaim, repair, refurbish, rebuild, reuse, recycle"
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