[Milsurplus] TBW Key Clicks/ Chirps

[Mike Hanz]

Yup...same deal with the GP-7...terminal 14 there, rather than "F".  The 
aircraft cable runs were sometimes pretty long, so they had to consider 
that aspect with more seriousness than the usual TBW installation, I 
suppose..  The in-line RF power filter for the GO-9 and GP-7 (F-8/AR) 
runs that terminal right on through internally so the six conductor 
cable doesn't need to be parted around the filter.

 - Mike

Richard Brunner wrote:

> 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.