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    anytone 6666 no carrier but has modulation on AM

    Just had an issue that just started tonight. My Anytone 6666 had the carrier just drop almost completely out, but the modulation is working. I can communicate on AM just fine, but if I keep it keyed down, the carrier drops down to almost nothing. I wasn't paying attention to my meter and started...
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    RF interference in PC

    OK, this is kind of backwards from what everybody usually experiences from a PC. Usually it's PC is interfering with the receive in a radio. In my issue the radio is interfering with the USB in my PC. I have a backlit keyboard and whenever I xmit on SSB the lights go out on my keyboard and I...
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    radio and amp matching....

    And here is one with the amp inline with the amp off.
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    radio and amp matching....

    This is just the Antenna on my Nano VNA.
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    radio and amp matching....

    I believe the amp to be AB biased. I have ran it on SSB with crystal clear audio reports. I am getting around 700w on SSB just using the Anytone to drive it and my MFJ 891 meter reading the output. The day I used FM, I seen around the same amount of wattage on FM as I was seeing on SSB PEP. So...
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    Just started

    I just read back thru it 3 times and have yet to see anywhere you posted that it's a comp cobra 29. (maybe I'm going blind) if it was posted I apologize.
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    Just started

    Not sure if I'm just not seeing it or it just hasn't been listed. What radio is this happening on?
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    WDX Roster

    Would like to be added WDX-651 Sharpshooter Fort Walton Beach, FL
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    radio and amp matching....

    It is a straight 4 pill. I am using an Anytone 6666 to drive it. I was told the maximum deadkey after the amp that I should see with the amp on would be around 100w. I've already had to send the amp back due to popping a transistor and now I'm scared to put the amp back inline with the 1.9swr...
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    radio and amp matching....

    OK, here's my situation. Shockwave antenna with 50ft of lmr-400 into an MFJ meter with a 6ft lmr-400 jumper into the radio, and I know the radio swr may not be perfect but at the radio it is showing a 1.0 swr. I also tested the swr without the radio plugged in with a Nano VNA and swr is around...
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    Picked up a Golden Eagle 750

    I just got one of these myself, It has 8 tubes in it. In the OP's pictures it looks as if his only has 6. What kind of drive should I drive this with. With a 2 watt carrier I can get about 450-500w PEP. Could I hit it with 10w swinging up too 75w?
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    Maco pumpkin face 75 amplifier

    This one?
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    Texas Star DX350HDV high reflect issue

    @nomadradio Am learning a little as I go. Would love to hear a full explanation as to what actually happens when something such as this happens in an amp. I know it causes high reflect, but why? I mean I have an idea, but it's just an idea. I think it has to do with balancing something within...
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    Texas Star DX350HDV high reflect issue

    I understand what you're saying now. it may not be ground, but it does connect between the 2 sides of the stackpole. In the picture it's C14. The negative side of the mica had come lose.
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    Texas Star DX350HDV high reflect issue

    OK, so I found part of the problem. on top of the stackpole there is a 1000pF stacked mica. The solder connection between one side of the pole and the ground on the stacked mica had broken lose. I soldered the mica back in and the below video is what I get now on the meter.
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    Texas Star DX350HDV high reflect issue

    It has DEI transistors. @Mustang 131 I don't have a dummy load available, but it does happen with another radio also. @nomadradio I did some probing around testing some of the caps while I had it open. I did come across C3 which is very near the input (while using the schematic from cbtricks)...
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    Texas Star DX350HDV high reflect issue

    not sure how to check the impedance on the amp. Is there a way i can do this with a multimeter with the amplifier off? I did check the ohm on C8 and am getting 0.5 with the meter set on 200
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    Texas Star DX350HDV high reflect issue

    This amp is less than a year old. What would cause harmonics in it?
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    Texas Star DX350HDV high reflect issue

    Just got this amp for real cheap from someone local. I know it probably had issues, but it was so cheap I couldn't pass it up. So got home and hooked it up on my MFJ-891. It's showing high reflect no matter what setting I have it on. On max setting and with meter set on the 200 watt scale, both...