[Milsurplus] BC-654/PE-104/BA-43 confusion.

[John McCarty]

Earlier this week I was trying to get my BC-654 and PE-104 going for a demo
on May 18th. Cleaned up the vibrator and I was getting 84 and -51 volts 
out no
problem. But the 1.5 filament was still down in the 1.1 range and the RX 
won't
work that low. O.K., no panic, we'll fix that another time. So I started 
to put
together a battery box to work like the BA-43. I was wiring it up just 
like the
PE-104 with +1.5 on pin 1 as the common, -1.5 on pin 4, +84 on pin 5 and
-51 on pin 8. But then the PE-104 has -6v on pins 3 and 7 from the PE-103
and these get used as -bias on the RX. Then I see a small diagram for the
BA-43 in the bottom of the page and it has the return for the -51 volts 
on pin 2
and the return for the B+ (-90v) on pin 7, which are tied together and 
become the
negative bias for the RX. How does this work??? I understand that using 
BA-43
you don't have to crank the generator (or dynamotor) to use the RX, but 
changing
from -90 to -6 is a big change. Also is the RX bias line a good return 
for the -51
volts (which is used by the TX)? It looks like when the PE-104 is in 
use, the +1.5
is the common return for everything.

So I guess my questions are, what is the right pin-out for the BA-43?? 
and can
I use it with the PE-103 as well as the GN-45?

tnx + 73


John n9hrt