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Old 14th May 2022, 3:24 pm   #9
Peterdee
Triode
 
Join Date: Jan 2017
Location: Poole, Dorsetshire, UK.
Posts: 25
Default Re: Heathkit HG10-B VFO

Hi Paula
Thanks again for your post. I removed the 6CH8 valve so there should be no rf present? Did the same measurements again and got the same result 108v either side of R1. I did the test you mentioned with a 120kr and 9v battery.
without the R - 9.65v and with R in line 9.53v.
Although the voltage from the tx is low, 265v, I think it should be 300v I am still getting the correct 108v at pin 5 of the OB2.
Before I spend money on another transformer could I use the 150v with a resistor in line to bring it down to 120v? Also, could you give me details of the trick you mentioned of using a smaller transformer. I have a few salvaged transformers kicking around, so I may have something suitable.

Peter
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