This (or these?) was used in the General Radio 1232-A tuned amplifier.
The holder is a cylindrical tube and the battery or cells are slid into
it to contact a strip for + on one end......pretty much similar looking
to what would take D-cell's except only slightly smaller O.D.
Cylindrical tube appears to be 1.25 I.D. x 7" long (Batteries would
occupy approx 6.5" of that...spring and rear cover the rest).

The only indicator of what they were is "M72 CELLS" on the cover
(Mallory?) Nothing found in my Google searches, online
cross-references, or in catalogues I have back into the mid 70's.

Any help appreciated - Thanks

Gord - VE1AJF

GS wrote:
This (or these?) was used in the General Radio 1232-A tuned amplifier.

Mallory RM-4R (unfortunately, NLA)

The power supply voltage is 12V. You could just use a set of ten 1.2V
rechargeables that will fit in the holder.

Thanks much Travis......The battery voltage was exactly what I wanted!
It'll be interesting to look up the specs for those old cells anyway.

Gord

GS wrote:
Thanks much Travis......The battery voltage was exactly what I wanted!
It'll be interesting to look up the specs for those old cells anyway.

Hi Gord -

I also found this today while doing some more research on those cells.
It may be of use to you.
http://www.jptronics.org/radios/GR/GR1232.pdf

Travis

Howdy again Travis - SURE APPRECIATED the link to that manual for the
1232-A! Saved a copy and will pass 'er on when I'm able to for others.

My junk box is open to you


73 - Gord VE1AJF