[Milsurplus] TBX to 40 meters

[Hue Miller]

Blair Shaw was asking about pruning the TBX a little so as to reach 40 
meters.
Blair, I found I had a photocopy of the one page on this, from Navships 
900,000.1  Service Notes Communications.
Assuming it's not already online, I offer to mail you this one page, reply 
with QTH.
I don't know where I have stashed the book at present. It does have notes on 
RBL, RBM, RBS, and so on. Most of the
notes I read are not major revelations.
As I said, I believe it's for the pre-8 model. The schematic does not 
specify the output tube, only identifying it as
V301.
Maybe this page will be of some slight interest or use to you. You could 
report your results back here and accrue
good karma.

I am interested in doing such a (small) mod on my TBXs too. Would make them 
much more fun. Altho maybe you
wouldn't want to run the pre-8 in the VFO mode. ( single tube oscillator! ) 
I was told years ago, though, that the
VFO-oscillator was no problem for 80m AM.

Funny thing, I recall reading about the Navy coastwatchers in China 
1943-1945, that the outstations used a "7 Mcs.
portable radio". From the text and from a photo I have seen, this is the 
TBX.
-Hue Miller