Heath SB220

Discussion in 'Amateur Radio Amplifiers' started by KD9DOG, Jul 3, 2021.

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  1. KD9DOG

    KD9DOG Ham Member QRZ Page

    When I tune this amp my plate current goes to .6 amperes and my HV is 2000 and 3500, the manual talks about an idle current which means to me that when I turn on the amp and press tune twice on the radio which keys up the radio and plate amps go to .12/.13 wiggles a bit. Do these readings seem ok.
  2. N0NC

    N0NC Premium Subscriber QRZ Page

    Idle current is when the amp is keyed, but not producing any power for instance mic gain turned down and PTT depressed the current shoould be steady and about 120 ma in cw positon (switch on the amp) and 180 to 200 ma in the ssb position. In other words the amp is just keyed, with no drive. Don't press tune or apply any power when checking the idle current. It is just the resting current of the keyed amp.

    73, Chuck
  3. KD9DOG

    KD9DOG Ham Member QRZ Page

    Ok then it is working OK
  4. WB2WIK

    WB2WIK Platinum Subscriber Platinum Subscriber QRZ Page

    If HV is really 3500 (SSB position), that's higher than it should be.

    Are you sure about that reading?
  5. W1QJ

    W1QJ Ham Member QRZ Page

    On a 244vac line, the actual voltage is 2400/2950 but the meters are never that accurate.

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