[Elecraft] Hallicrafters SX-43

[Ron D'Eau Claire]

Wow, how much different from an Elecraft rig can you get?  Hi!

The SX-43 was designed to run off of 117 vac, 50/60 cps mains power.
Although modern mains in the USA tend to be closer to 130 volts today, that
will usually not cause serious damage (real history buffs who treat their
boatanchors with tender care use a variac to keep the voltage down to the
mfgr's specs). 

You'll find an octal socket on the back of the chassis. There needs to be a
shorting plug installed in it for the receiver to run off of a-c mains.
Without it, the heater circuit is interrupted. 

You can also furnish d-c to that octal socket to run the receiver off of an
external supply. I checked and it'll need 6.3 vdc (NOT 13 vdc!) at about 4
amps and 270 vdc at 100 mA. Back when this receiver was popular, external
"vibrator" power packs, such as were commonly used in car radios, were used
to run the receiver from a car battery. Car batteries were 6 volts back in
the 50's <G>. 

Ron AC7AC

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Colin WHITMORE
Sent: Friday, December 30, 2005 9:28 AM
To: elecraft at mailman.qth.net; QRP-L at mailman.qth.net
Subject: [Elecraft] Hallicrafters SX-43


Gents,

I have recently aquired a Hallicrafters SX-43 receiver and have a quick 
question.

The power cable was in very bad shape and didn't have an end connector on 
it.  I am planning on wiring up a new cable but wanted to be sure how to 
power it.  I am assuming it requires a 12VDC source, but I'm not sure.  Does

anyone have any ideas?

Please respond direct.

Cheers,
Colin - AC0S


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