[Hallicrafters] HT-32 PTT and CW break-in mods?

Al Parker anchor at ec.rr.com
Sun Jul 18 13:22:38 EDT 2010


hI agn Peter et al,
	I forgot (common thing nowadays), that article from a May 64 issue of 
73 mag is on my website, take a look at 
<http://www.boatanchors.org/HT37.htm> down at the bottom of the page.
	You also should be interested in the section on "solid stating the 
HT-37" (the HT-32 & -37 are essentially the same xmtr except for the 
method of sideband generation).  It is advisable to remove the 5v 
filament windings of the power transformer from the circuit by going 
solid state at the rectifiers.  A common failure mode of the HT-32/-37 
is for the HV winding of the xfmr to short to the 5v filament winding, 
or/and to ground, thus trashing the xfmr  It's a simple change which can 
save you future anguish.
73,

Al, W8UT
www.boatanchors.org
www.hammarlund.info

"There is nothing -- absolutely nothing -- half so much
worth doing as simply messing about in boats"
Ratty, to Mole

On 7/18/2010 12:51 PM, Peter Bertini wrote:
> Hello to the group
>
> I just traded for an early SX-32 transmitter, and I'm going
> cross-eyed trying to following the relay keying circuit through
> the maze of operating and function switch contacts.
>
> So, to make my life easier--is there a good source for
> modifications to allow for VOX operated CW keying and
> changeover,  as well as a means to add manual PTT
> that also disables the VOX feature?
>
> Pete
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