I'm needing about 108 NiMH AA for 3off Replica Ever Ready B104 45V=20
battery packs. (36 per pack)
It's for a miniature suitcase  spy style  Radio set (RX & TX)


Any recommendations on sources with cheap postage that are going to last=20
well?


Service Life and cost  rather than mAH capacity are the issues.

Also thoughts on getting more than 3500mAH @ 1.25V nominal by=20
paralleling multiple NiMH?

Other Issue. These are miniature Military Russian valves (tubes to=20
Americans) and *REALLY* are  1.2V or less filament. Ideally maybe 1V to=20
1.1V for longest life and consistent performance.

Fresh an NiMH is almost 1.5V (1.48V I have measured). Flat is rapid=20
after 1.0V or 0.9V?
The VERY early 20's radios used 2V cell and rheostat on filament. It=20
would be nice to do this without transistors or ICs, so I thought a 3=20
way switch, two values of resistor and last position a short to keep=20
filament supply around the 1V to 1.1V. Any better ideas.

If I *DID* use a regulator, 1.08V out for 1.1V to 1.5V in and then less=20
than 50mV drop as cell heads lower is not something off the shelf?
Total consumption might be 700mA to 800mA @ 1.15V (The Valves are 16mA,=20
24mA, 54mA and for "P.A." valves 220mA).  Normal HT is 44V nominal (need=20
not be regulated, so 36V (near flat) to  51V (fully charged via diode, 3=20
x 45V packs diode paralleled) and on Transmit relays connect the 3 packs=20
in series (no diodes) boosting HT on P.A. from 45 to  135V ( 108V near=20
flat to 159V fresh) with no diodes and one pack feed +45V to rest of radio.

The RF class AB push pull valves are used for speaker on Receive and RF=20
PA on TX. Only 44mm x 11mm!

--=20
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