[Milsurplus] TBW Key Clicks/ Chirps

[Richard Brunner]

Dennis wrote:
> I have an original TBW 115/230 vac, 60 cps to 115vac 800cps MG set 
> (CDO-21648).  I adjust the compensating cap values in the GP-7 according 
> to the book, i.e., for minimum voltage deviation between key down and 
> key up as measured at the output of the filament xformer.   The GP-7 is 
> an MOPA rig, BTW, unlike the TBW. 
> 
> Don't know what you mean by "feedback voltage regulating connection."  
> Only connection between the generator and the rig are the power lines. 

Well, the TBW MG set has a saturated pole design generator which is 
inherently self-regulating.  The 800-1 aircraft generator I'm using is 
not, and has a feedback winding which connects to the 120 volt output. 
It is brought out of the generator so it can be carried to the load, 
thus eliminating voltage drop in the feeders.  As noted, the actual load 
terminal is the transmitter side of the series capacitor, so I go into 
the TBW for the connection.  The GO-9 brings this connection out of the 
transmitter, labeled "F," but does not say much about it in the book. 
The 800-1 generator also labels this as "F."  Coincidence? I don't think so.

Richard, AA1P