[Milsurplus] TV7 Type 83 rectifer replacement

[Bob kb8tq]

Hi

Unfortunately the real answer with any of the tube testers is “they need calibration”. There are a lot of 
parts in them that are not as stable as one might think they are. Once you accept that, the answer is a 
bit easier:

Put in the diodes

Put in a resistor 

Put in a stack of Zener diodes to regulate the B+ better

Calibrate the device 

Is that a pain? Sure it is. 

Bob

> On Jun 2, 2020, at 7:18 PM, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:
> 
> Does anybody have info on replacing the 83 in a TV7 with diodes?  What size dropping resistor is needed to maintain calibration?  Is there another tube rectifier that will do the job?
> 
> Charlie, W4MEC in NC
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