[Hallicrafters] HY37 HV and bias voltages

[Bill Gerhold]

Change R64 to 15k.  Hopefully, you are measuring at the TP2 test point.

K2WH

-----Original Message-----
From: hallicrafters-bounces at mailman.qth.net
[mailto:hallicrafters-bounces at mailman.qth.net] On Behalf Of zuu6k at juno.com
Sent: Thursday, August 04, 2005 5:47 PM
To: w2kj at bellsouth.net
Cc: Hallicrafters at mailman.qth.net
Subject: Re: [Hallicrafters] HY37 HV and bias voltages

What is your filament voltage? If it is high too, check your line
voltage.

73, Ed K6UUZ

On Thu, 4 Aug 2005 14:35:32 -0400 "Joseph Trombino Jr"
<w2kj at bellsouth.net> writes:
> 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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