heathkit - hw-16 instructions and user manual · 2015-11-08 · heathkit_hw-16_svc-bul.txt...
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Heathkit_HW-16_svc-bul.txtSeptember 26, 1968HW-16 Novice Transmitter Bulletin No: HW-16-1
Side ToneWhen using the HW-16 with a VFO sometimes a partial operation of the sidetone oscillator takes place due to an increased loading on the bias voltage. This can be corrected by changingR-69 from a 120K ohm resistor to a 220K ohm resistor [PN 1-29]. Also, the original schematic shows R-16 as a 4700 ohm resistor which is incorrect. R-16 should be shown as a 5600 ohm resistor.--------------------------------------------------------------------------------
September 9, 1971HW-16 Novice TransmitterBulletin No: HW-16-2
Resistor Failure Due to repeat failure of a resistor in the field, the following change should be made in all units being serviced:CHANGE: R21 22K 1 Watt to 2 Watt [PN 1-11-2].
Pagina 1