[Hallicrafters] HT-44 carrier balance

[Wa9mxq at cs.com]

Ed,

Yes, not uncommon. In the balanced modulator circuit there are four 0.01uF capacitors that seem to go bad. They are tube shaped and silver in color. You can't miss them in the radio or on the schematic (which I do not have with me right now). I temporarily solved the problem with my particular HT-44 by redressing those four capacitors outward from the sockets. Later, however, the problem returned. At that time, I replaced the capacitors with some simple Radio Shack mylar 0.01uF units 100% success.

Sorry I don't have further details with me right now -- but would be happy to provide same if needed.

73,

- Bill, WA9MXQ


Ed Gable <k2mp at eznet.net> wrote:

>Has anyone seen a problem with severe carrier unbalance in
>the Halli HT-44 ?  I'll be transmitting fine and all of a 
>sudden the carrier goes to over 50 watts.  Unkey and key up
>and it may or may not have a carrier again.  It is proven
>it's carrier and not PA spurious.  When at full carrier
>the chassis is very microphonic and tapping any tube causes
>lots of microphonic noise in a nearby receiver.  I've changed
>all the tubes except the 6DQ5's.  mic gain and RF level
>pots have no affect.  When the carrier is there the BAL
>pots have little effect, when the carrier is not present the
>BAL pots null perfectly.  HELP !
>
>73,  Ed  k2mp
>see www.antiquewirelss.org
>
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