Off-The-Wall Question
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To rough test whether the mechanical filter is working, jury rig a .01 Mfd
cap disc capacitor from filter input to filter output. If volume and noise perk
up, filter is probably bad.
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Since I worked at Lafayette and also did the service for most of the NJ
stores for a number of years, when we started closing the stores as part of
bankruptcy proceedings, all the service parts, cannibalized equipment, and
anything else the stores didn't want and were going to throw it away, it all
came home with me. So, I probably have the largest collection of NOS Lafayette
parts that still exists today although I've been trying to work down the pile
for the last 40 years.
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I don't recall, since I don't have the file folder and manual?in front
of me, whether we issued any service addenda on the HB-600.
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The HB-600 was the "top-of-the-line' solid-state base transceiver we sold
in 1966. It was also called the "CB Commander" (one of the marketing guys came
up with that tag). Also had a? 5 stage "unique RF Noise Silencer". It sold
new for $220.
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It made the front cover of the main 1966 Lafayette catalog.
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Pete, wa2cwa
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On Fri, 07 Mar 2025 21:54:26 -0800 "Justin Bowser - KI5GKD" <justin.bowser@...>
writes:
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This may help if your bad filter was made by Kokusai: It seems that the insertion loss is pretty much the same as the Collins mechanical filters of the same era, about 20 dB. Good luck, Jim Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
On Saturday, March 8, 2025 at 02:55:07 AM CST, Peter A Markavage via groups.io <pmarkavage@...> wrote:
To rough test whether the mechanical filter is working, jury rig a .01 Mfd
cap disc capacitor from filter input to filter output. If volume and noise perk
up, filter is probably bad.
?
Since I worked at Lafayette and also did the service for most of the NJ
stores for a number of years, when we started closing the stores as part of
bankruptcy proceedings, all the service parts, cannibalized equipment, and
anything else the stores didn't want and were going to throw it away, it all
came home with me. So, I probably have the largest collection of NOS Lafayette
parts that still exists today although I've been trying to work down the pile
for the last 40 years.
?
I don't recall, since I don't have the file folder and manual?in front
of me, whether we issued any service addenda on the HB-600.
?
The HB-600 was the "top-of-the-line' solid-state base transceiver we sold
in 1966. It was also called the "CB Commander" (one of the marketing guys came
up with that tag). Also had a? 5 stage "unique RF Noise Silencer". It sold
new for $220.
?
It made the front cover of the main 1966 Lafayette catalog.
?
Pete, wa2cwa
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On Fri, 07 Mar 2025 21:54:26 -0800 "Justin Bowser - KI5GKD" <justin.bowser@...>
writes:
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开云体育For what it’s worth I converted an Eico CB transceiver to 10 meters (29.6) many years ago.? It was crystal transmit and VFO receive. ? Mike Langner ? From: [email protected] <[email protected]> On Behalf Of Justin Bowser - KI5GKD
Sent: Saturday, March 8, 2025 9:47 AM To: [email protected] Subject: Re: [HallicraftersRadios] Off-The-Wall Question ? Mike - It's solid state so no tubes or HV to worry about.? I've tested low-pass filters with my Nano VNA a long time ago and seem to remember that one channel is hooked to input and the other hooked to output. ? Pete - I'll give that a try and let you know.? I also got another rare/unusual bird coming, an HE-43C.? I've never seen a CB where you transmit with crystal and receive by VFO.? What I plan doing is to put in a circuit that replaces the crystals with an Arduino controlled 5351 module. ? 73, -- Justin B. |
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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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For what its worth - the Lafayette mechnical filter Part Number in the
HB-600 is 1253-24.
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Pete, wa2cwa
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On Sat, 8 Mar 2025 17:35:22 GMT "k2orsfan via groups.io" <k4pf@...>
writes:
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Peter A Markavage
Jim Whartenby
Mike Langner