[Milsurplus] BC-611 MF vs low VHF

[Hue Miller]

----- Original Message ----- 
From: "Bob Camp" <ham at cq.nu>

> In order to easily run at 30 MHz you would have to be able to plug in 
> third overtone crystals in the crystal oscillator. As far as I know 
> that just wasn't an option in 1940. Simple production of fundamental 
> crystals was a significant bottle neck through 1943.
> 
> If you went with fundamental crystals you would be stuck with a 3X to 
> 6X multiplier. Depending on weather you do it in one stage or two you 
> add some power or lots of power to the total current drain. Two stages 
> probably are more likely in order to keep the sub harmonics down.

The Forest Service was doing this portable radio thing before Dec 7 '41
with equipment in the 33 MHz range from 7 MHz range xtals. Double
in osc and PA. It's true they had superregen receivers but i do not
believe that would have been that bad a solution; if so, it still could
have been designed with a superhet receiver and IF in the 1.5 - 2 MHz
range. -Hue