[Milsurplus] TBX generator - trouble

[John McCarty]

I’m glad Ray and Rob brought up the subject of the hand cranked 
generator (TBX-8) because I have one on my work bench that I’m trying to 
fix. The trouble first showed up at a demo I was doing. The problem 
exists with the generator completely disconnected from the radio. When 
you start to crank, the 12 and 500+ volts quickly go up to there normal 
level but after a few seconds, the generator gets hard to crank for a 
second, then gets very easy to turn and the voltages fall off to approx 
150 for the high voltage and 3 volts for the filament. The more often 
you repeat the test, the quicker it fails. I’ve lifted a few of the 
filter caps to see if there are failing (C501, 503, 504 and C505) and no 
change. I haven’t lifted the others yet as they are going to be harder 
to get at. But before I do, am I barking up the wrong tree or is this a 
problem with LV brushes or the voltage regulator??

Tnx + 73

John n9hrt







On 2/23/2012 8:10 AM, Ray Fantini wrote:
> Saw this on EBay, and with all this talk of TBX stuff did not know if anyone was looking for the crank generator. Look at item number: 270921114132
> I have no connection to seller just know if you have the radio you can always use the generator.
> RF
>
>
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