[Hallicrafters] HT-37 low voltage rectifier

[Al Parker]

Hi Riley,
    I'd suspect a problem with that SS plug-in.  Diodes in backward, or
shorted, or perhaps wired to pin 8 instead of pin 2, or pins 2 & 8 shorted
together.  Sounds like the filament winding may be shorted by pins 2 & 8
of the SS unit.  I wonder why someone said not to do the LV section?
hope this helps,
73,
Al, W8UT
New Bern, NC
BoatAnchors appreciated here
http://www.thecompendium.net/radio/
http://www.hammarlund.info

(I didn't see your msg until 2:26PM)

----- Original Message ----- 
From: "Riley Hollingsworth" <rholling at adelphia.net>
To: <hallicrafters at mailman.qth.net>
Sent: Friday, November 07, 2003 8:17 AM
Subject: [Hallicrafters] HT-37 low voltage rectifier


> I have re-capped the HT-37, gone over it and fired it up.  I haven't
loaded
> it yet. I noticed a medium level buzz in the power transformer that
> disappears when I take the low voltage solid state replacement out and
put
> the 5V4 back in.  I'll just leave the tube in to do the performance
test,
> but why would it cause the transformer to buzz ? The transformer is
> perfectly quiet without the solid state LV.  I think at least one e mail
> said to not replace the LV rectifier with a solid state---looks as if
I'm
> about to find out why!
>
>