| Brand | Unbranded |
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Check the listing for details. QRP AM/CW Ham Radio Transmitter 80/40 Meter Bands Heising Modulation. Condition: New. Listed at 397.00 USD. In am mode, this transmitter employs Heising modulation, using a high impedance, crystal mic input to a 6SL7 dual triode, driving a 6V6, which then modulates the 6AG7/7AD7 RF output tube. The neat thing about this particular circuit is that you can use any of the QRP variety HC49/S and/or HC49/U crystals.
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