[AMRadio] Hallicrafters SX-24 coil winding information


Bob Macklin macklinbob at msn.com
Mon Apr 18 12:45:14 EDT 2005


Do you have a reactence chart? You can determine the coil inductance from
one if you know the capacitance. Then wind a coil based on that info. Is the
coil in the Rx an air core coil? Most I remember were. Are yo rewinding the
original? or is the form destroyed?

Bob Macklin
K5MYJ/7
Seattle, Wa.

----- Original Message ----- 
From: "Bill Fondren" <bill.fondren at sbcglobal.net>
To: <amradio at mailman.qth.net>
Sent: Monday, April 18, 2005 9:10 AM
Subject: [AMRadio] Hallicrafters SX-24 coil winding information


> I need help     I have a old Hallicrafters SX-24 that the broadcast band
coils, both osc and antenna coils are gone. For some reason the mice only
got those 2 coils and the old set works pretty good on all the other bands
so I would like to wind new coils and get the broadcast band working. My GDO
does not have the BC band on it so its no help.  I installed a universal osc
coil that seem to work but I cant seem to get the ant coil right.  I have
used formulas on the web and get about the same number of turns for the
windings.  The coils are wound on 3/4" form, the tuning cap is 440 mmfd.
with 4 mmfd of trim across it.  I am using 34 gauge wire and the formulas I
used says to use 130 turns for the secondary of the ant coil.  I used about
50 turns for the input coil.
> Any help or suggections would be appreciated.  I also have the HT-9
transmitter and would like to get the  1939 station back on the air.
Thanks    Bill Fondren   K5PML
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