Re: Off-The-Wall Question
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Lafayette HE-43C is not rare. It is identical to the HE-20C (which we sold
1000's of these sets - HE-20, 20A, 20B, 20C(relay and electronic switching
versions), 43C) except the 43C works on 110V AC and 6 volts DC. The 20C works on
110V AC and 12 volts DC. Other then that, they are identical. I just finished a
HE-43C manual for a customer. Both the HE-20C and 43C were made by United
Scientific Laboratories (USL) in Long Island City, NY.
A tunable receive and a crystal controlled transmitter was quite common
with a number of manufacturers in the early 60's. A Spot switch obviously was
common on these transceivers.
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The HB-600 had one major service bulletin. There were excessive failures in
the 2N2949 RF Power Amplifier so a board and circuitry with a different RF Power
Amplifier transistor was designed and circuit diagram and install instructions
were provided.
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For a short period, The HB-600 was replaced by a HB-600A which had the
revised RF Power Amplifier already installed. There were also some other circuit
changes but don't recall what they were.
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On Sat, 08 Mar 2025 08:46:48 -0800 "Justin Bowser - KI5GKD" <justin.bowser@...>
writes:
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Peter A Markavage