[Milsurplus] Free - running osc at 7 MHz

[Hubert Miller]

To address some question I may have missed:
I don't have access to it til later this year. It's 6.5 hours away.
Chesson's list is wrong if it sez  2 - 3 MHz. On the face of it, it's wrong because those freqs were already well - occupied and busy.
As I recall, the contract date is something like ( shoku ! ) 1940.
I believe in U.S. Army these were retained probably up to the start of the war for training, then training would proceed with regular issue equipment.
But I also think this was still front-line equipment supplied to the "Philippine Scouts" Filipino nationals military units right up to the time of the Japanese invasion.
-Hue

>Hue what is the size/windings of the inductor? According to the Chesson list on Radionerds, the -156 covered 2-3 Mc, not 5 Mc but who knows?  Any idea of the contract date? The use of the VT25 suggests it's after 1930, but the design is certainly pre 1930.  C1  (350 pF) is across L3 and L4 by virtue of the .01 uF cap, so it is   fairly high C Hartley, and the variable across C1 would tune the frequency. (Along with the antenna characteristics!)
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