[Milsurplus] RCA Radios

[Mike Morrow]

Jack wrote:

>The AVT-112 takes FT-243 style crystals.  The AVT-15 crystal holder
>is almost the size of an FT-171.  

That's the big RCA AVA-10 type crystal holder, which will also fit the AVR-20 (along with the FT-243 style).  They were also used in the AVT-23 transmitter that the US Navy bought.  (What use the USN made of the AVT-23 remains a mystery to me).

>But I'm thinking the 6L6 oscillator design may be a little hard
>on crystals, so I didn't go too much farther with it, like checking
>modulation and FM'ing.

That's a real good point.  I wonder what the crystal current is.  Doubtless the FT-243 units fare better with the 6V6 MO in the AVT-112.

I don't think that the modulated oscillator design of the 6L6 in the AVT-15 can even be properly termed an electron coupled design, a MOPA in one tube, the way that designs like the 837 single tube transmitter in most of the TBX-series clearly can be.

Mike / KK5F