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

[mac]

John,

Definitely a confusing and difficult radio to work on.  Never tried to  
run off battery power myself but just took a quick look at the  
schematic.  Think I see the dilemma you describe but haven't traced it  
all through.  Don't forget to look at the PE-104 schematic as well.   
There are some jumpers on the -104 connecting socket that could affect  
the equation.  In the short term you might just take the battery  
pinout on faith and see what happens.

Have never laid eyes on an  original BA-43 BTW.

Good luck!

Dennis D.  W7QHO
Glendale, CA

*************
On May 8, 2013, at 10:11 PM, John McCarty wrote:

> 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
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