[Milsurplus] BC-640

[Jack Antonio]

I have to wonder how deserved the TVI reputation of the BC-640 really 
was.  Was the transmitter really as dirty as claimed, or was TVI the
result of running the unit without the proper shields and covers in place?

My thinking is that what we call TV channels 7-13 today, were in WWII
used a lot for IFF and radar, and if the BC-640 was such a dirty 
machine, are there reports of BC-640s bothering the receivers of
radar and IFF systems?

Did the military do compatibility studies during WWII of what systems 
could or could not be used near each other?

Just curious

Jack Antonio WA7DIA
scr287 at sbcglobal.net


Rod Hogg wrote:
> Last BC-640 I was around ended up in local salvage yard, in many pieces.  It
> was used a couple times on 2M, but found it generated more TVI signal than