Re: HT-44 Common Problem?
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I had to replace those resistors in a HT44 also. I recall measuring the current and it was exceeding the dissipation of the 2 watt resistors.
Unable to get my hands on 5 watt resistors, I put 10 watt 25k resistors in there.
This is the second HT-44 where I've run into this problem.? I use the HT-44 heavily on CW and my current one has logged hundreds of QSOs in contests.? The other day it suddenly had no output on any band, same symptom observed on another HT-44 I owned.? In digging into the problem, I found the cause to be the same as on the other HT-44.? Resistors R16 and R17 (22K , 2 watt) were cooked and V3, a 12BH7 associated with those resistors tested weak.? I replaced the resistors and the 12BH7 and now all is well again.? Had to adjust the pots to null the carrier for SSB.? I wonder if others have experienced that problem?? Not sure if the cause of the failure was the tube, or maybe the two resistors are undersized for the current?
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73, Floyd - K8AC
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Steve Marquie