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Recent content by fixer

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    CURRENT AND PSST OWNERS OF THE PALOMAR 300a

    You have to be careful which external "power supply" you get since there are two different models of 300A's. The difference is in the power supply in the amp itself. One uses a full wave rectifier and the other model uses a doubler for the high voltage. If you get the incorrect external power...
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    D&A PDX-400

    The 6JG6 is not used when it was converted over to an amplifier. It was the oscillator tube when it originally was a transmitter. It still has to be in the socket so one of the 6LQ6's will light up since the filaments are in a series-parallel arrangement. Being basically a 9 tube Phantom the...
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    Subsitutes for 6lf6 tubes???

    6LB6's used to be the cheapest replacements, but the price of them has risen also.
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    Problem with my Maco 300.

    Center Position - Standby Up - Transmit, Receive Pre-Amp On Down - Transmit, Receive Pre-Amp Off
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    Problem with my Maco 300.

    Center Position - Standby Up - Transmit, Receive Pre-Amp On Down - Transmit, Receive Pre-Amp Off
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    Demon 500 not keying up.

    I would replace the small electrolytic caps in the keying circuit, plus the 250 uF's in the 12 VDC power supply. I would replace the 250's with 470's like the later models used. Fixer
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    Tricky Schematics

    A Z28 would be closer to specs. Be sure to check the .005 uF (C11) for shorts or leakage.
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    Tricky Schematics

    22uH. It is a protection device for if C11, the .005 uF cap would happen to short there would be high voltage going to the antenna. With the choke being there it would short the high voltage power supply to ground and hopefully R11, the 2 ohm 10 W wirewound resistor would open up, killing the...
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    cp400 power plug help

    I'll see if I can find a SAM's # 268.
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    cp400 power plug help

    Johnny, Did you try this group? https://groups.yahoo.com/neo/groups/CPIcbRadios/info?yguid=542026196 You may have to join, but there are some photos on there. If you don't find anything, PM me and I'll see about getting you some pictures.
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    Nice but still olny a cobra 2000

    You mean like two for the price of one?
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    Kris Mach 3 low watts

    Weak Tubes?
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    black Cat JB2000

    That is the correct way to set the amp's carrier with the tuner on the back when using the stock driver tube. It's basically a JB 150 driving a pair of 3-500Zs. Alan
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    Old Amp, But Is It HomeMade?

    Looks like a Crusader 125 made in Lebanon, TN. The stud mounted outputs are getting hard to find.
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    MKVlA

    Most of the originals were OMRON. Some are...MHE402PG-UA-DC6 2A28VDC/120VAC Another OMRON...MHE405PG-UA-DC6 5A28VDC/120VAC Have also seen Magnecraft... W67CSX-6 NOM VOLTS:6 RES OHMS:52 CONT RATING:3A Hope this helps, Alan
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