[Hallicrafters] HA-4 Keyer Questions

[Bill Gerhold]

1961.  It is the transistorized version of the HA-1.  I would imagine, it
would work with the SR-150.  I don't think Hallicrafters would manufacture a
keyer that did not work with their own rigs.  However, being a solid state
keyer, I think keying a all tube rig would require (possibly) some interface
between the two due to voltage spikes and high voltages.  Maybe it has a
electro-mechanical relay output and not a transistor or SCR.  My best guess.

K2WH

-----Original Message-----
From: hallicrafters-bounces at mailman.qth.net
[mailto:hallicrafters-bounces at mailman.qth.net] On Behalf Of Mike Peron
Sent: Sunday, November 19, 2006 1:27 PM
To: hallicrafters at mailman.qth.net
Subject: [Hallicrafters] HA-4 Keyer Questions

Just bought an HA-4 keyer that should arrive shortly. I didn't know
Hallicrafters produced a transistorized version of their venerable HA-1. Can
anyone tell me the vintage of this fine looking keyer and its popularity
(I'm guessing late 1960s)? Any comments on its performance/shortcomings
would be appreciated. Will it key my old SR-150? 

It is arriving without a manual and none is available on BAMA. I see a few
web site selling copies so can someone steer me to a reputable outfit? 

Many thanks and 73's

Mike WB6UTW
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