[Hallicrafters] HT37 problems solved (?)

[Bill Gerhold]

Good news Joe.  I too hope to work you 37-37.  BTW, a good crystal mic will
do wonders for the audio on this fabulous phasing rig.  As to carrier
suppression, I just use my Kenwood SM-220 monitor scope for minimal
suppression.  Works just fine.

K2WH

-----Original Message-----
From: hallicrafters-bounces at mailman.qth.net
[mailto:hallicrafters-bounces at mailman.qth.net] On Behalf Of Oliver J. Dragon
Sent: Friday, September 16, 2005 2:30 PM
To: Hallicrafters at mailman.qth.net
Subject: Re: [Hallicrafters] HT37 problems solved (?)

Joe,

If it hasn't been mentioned already, I recall using the S-meter in my Drake 
2-B rather than the HT-37 meter when nulling carrier. It's been 45 years or 
so but I think putting the '37 in MOX and receiving on my un-muted '2B did 
the trick. Might have been a more sensitive setup than pulling the "meter 
sensitivity" control on the '37. Time fades memory however, so I may not be 
recalling things quite correctly.

Good luck with the setup. Wish I still had mine.

Ollie.

At 01:15 PM 09/16/2005, you wrote:
>OK....we returned home yesterday after the hurricane here (Wilmington, NC) 
>and today we started testing 12AT7 tubes along with 12AU7's and 12AX7's.
>
>Pulled a pair of 12AT7's out of my regenerative receivers, the Space 
>Spanner and the Explor-air and put them in the HT37....lo and behold I can 
>now null the carrier with both controls!!
>
>Tried another pair of 12AT7's with no joy....full carrier when going to
MOX.
>
>The readings noted on my B&K747B tube tester were all very similiar for 
>the 12AT7's.......I can't figure out why this pair of 12AT7 tubes worked 
>as compared to the others but I ain't complaining (grin)
>
>OK....next step is to order some NOS 12AT7's and give them a try.
>
>Now to check the sideband suppression......rig is getting pretty close to 
>putting on the air.....with my Drake 2B it should be a fun vintage station 
>and I can then check into the Hallicrafters net with a "real" rig (grin)
>
>Many thanks to all of those who provided wonderful and helpful suggestions 
>on how to get this boat anchor flying....it was a lot of work and 
>frustration but is now pretty much done.
>
>Meet you on the air soon.
>
>                                    73, Joe W2KJ
>
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