[Hallicrafters] HY37 HV and bias voltages
Joseph Trombino Jr
w2kj at bellsouth.net
Thu Aug 4 14:35:32 EDT 2005
I just replaced the electrolytic caps in my HT37 and added the Weber Copper
Top solid state rectifiers to replace the 5R4 and 5V4 tubes.
My HV now reads +907 VDC and the bias is -65VDC.
(I didn't do any measurements before the replacement job since I didn't want
to take a chance with a bad cap and blow the power transformer)
Believe I can try and adjust the bias voltage down to the recommended -49
but am wondering if the higher HV is OK.
Wonder if the solid state rectifiers are the reason for the higher
HV.....the book indicates that the HV should be +750.
Ideas comments are welcomed.
73, Joe W2KJ
Trying to get a vintage station on the
air
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