Testing a transmit problem that appeared yesterday. I tried RTTY, CW and AM. All modes show pretty much the same problem. I did remember to check the dummy l…
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AmateurLogic.TV 52: GigaParts Ham Radio Day

George visited GigaParts in Huntsville Alabama for Ham Radio Day on March 16th. We take a look at the store and visit with some of the manufacturers reps to …
Video Rating: 4 / 5

11 replies
  1. Jeffrey Peters
    Jeffrey Peters says:

    Excellent Video and Informative. Will be watching more of your Outstanding
    work! 72/73 de Jeff – K9JP SKCC #3008T

    Reply
  2. wrlgmail
    wrlgmail says:

    Great job guys- I’ve seen GP at the hamfest a couple times- never knew they
    had such a sweet store- like the “good old days”. Very positive for all. 73
    Bill N4BKT

    Reply
  3. Jon Milliren
    Jon Milliren says:

    Roger that ~ I’m planning to take it apart and go through the ARRL
    tutorials and see if it’s something silly first.

    Reply
  4. MyHamShack
    MyHamShack says:

    I would say that you have cooked the PA from using exceeding the power
    output while using digimodes. In Digimodes , PSK31 SSTV — whatever , your
    power output must be set WAYYY down , perhaps 15 to 30W on a 100W rig. This
    is because the duty cycle of these types of transmssisons is higher than in
    other modes. It therefore generates more heat and you are then that much
    closer to a melt down. 100W Ham rigs are not 100W continiuous duty.

    Reply
  5. MyHamShack
    MyHamShack says:

    Yeah, 50 would be too much. I am wondering if the cooling fans were on ?
    With my Yaesu radio’s even in SSB at 100W the fans will kick in if your rag
    chew goes over a few minutes in length .,, and SSB is quite low duty cycle.
    Hope you get the old radio fixed , its probably just a bad solder joint in
    the PA , around the transistors.

    Reply
  6. Jon Milliren
    Jon Milliren says:

    Yep – I think that too. I kept looking at my wattmeter and and sure I was
    at 50w or under while transmitting psk31 – I guess maybe what I should do
    is set the power to 30w in my dummy load before going on the air, and then
    not touch the power output at all once that’s set. I think I’m going to be
    a little gun shy when I get my next radio. Thank you for your input~!
    Sometime lessons are learned the hard way.

    Reply

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