| Brand | Unbranded |
|---|---|
| Type | Ham Radio Transmitter |
| Band | HF |
Check the listing for details. QRP 80/40/20M 7AD7/6AG7 CW Transmitter (7.0 watts Input). Condition: Open box. Listed at 165.00 USD. In this circuit I am using a 7AD7 locktal tube. Power input is lower than possible with a 6V6 tube, but the neat thing about this transmitter is that it works well with any of the HC49/S and/or HC49/U crystals, without any serious issues with chirp!