|[AMRadio] Halli HT37 Phasing Mod problem|
James M. Walker
chejmw at acsu.buffalo.edu
Tue Nov 27 15:11:58 EST 2007
I am having a little trouble understanding your problem.
I run an HT-37, the balance controls on it work similar to the SB-10 and
the heathkit Apache, and the Central Electronics 10A/B and 20A.
Might you explain your sequence for clarification? I might be able to help.
----- Original Message -----
From: <DOXEMF at aol.com>
To: <amradio at mailman.qth.net>
Sent: Tuesday, November 27, 2007 12:59 PM
Subject: [AMRadio] Halli HT37 Phasing Mod problem
> I have been trying to get this like new HT37 on the air for awhile.
> The audio phasing modulator has been near impossible to properly ballance
> espeially using the manual instructions.
> So far have replaced a leaky low pf brown drop silver mica
> that corrected some of the problem but still am not able to get a properly
> phased output from the modulator.
> The audio seems ok up up to the rf stage where it won't align. The carrier
> osc is on freq ok but the carrier phasing adjustments do not work out.
> Where would be a good location to apply a ballanced audio signal to
> bypass most of the original circuit?.
> Has anyone come up with an alignment procedure using modern test gear?
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