[Hallicrafters] RTMA Dummy Antenna needed for alignment?

Hunter Ellington hunter.ellington at gorrellgiles.com
Mon Apr 28 10:28:45 EDT 2008


As of April 1, 2008, Hunter Ellington is no longer with our firm.

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Thanks,
Christina M. Meisel
Legal Assistant/Accounting Manager
(303) 996-6595 Direct
 
Gorrell Giles PC

-----Original Message-----
From: hallicrafters-bounces at mailman.qth.net
[mailto:hallicrafters-bounces at mailman.qth.net] On Behalf Of Randy
Perkins
Sent: Sunday, April 27, 2008 6:59 AM
To: hallicrafters at mailman.qth.net
Subject: [Hallicrafters] RTMA Dummy Antenna needed for alignment?

Hello to the group.
I am in the process of restoring my SX-99 receiver. In the alignment 
instructions they speak about using this RTMA Dummy Antenna in between 
the signal generator and the antenna input terminal.  In the 
Hallicrafters SX-99 book it shows the schematic for this Dummy Antenna 
and also in the Sams Photofact for the SX-99. The Hallicrafters book 
shows the inductor in this circuit to be 20 microfarad in the Sams 
photofact it shows it to be 20 millifarad. Does anyone know the correct 
value for this inductor?
Is this RTMA dummy load actually necessary? How critical are the 
component values? What is this RTMA Dummy Antenna for? Digging through 
the junk box, I have found the resistor and capacitors or pretty close. 
If the inductor is 20 microfarad would some small enameled wire about 1 
ohm resistance wound on a small form suffice? Any info on this is 
appreciated.
73, Randy, W5KCM
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