1979 WARC BAND COVERAGE INFORMATION
Here are the initial control settings for tune-up at 18.1 MHz:
| Model | Bandswitch | Tune | Load |
| PA-76 (ALL) | 21 | 25 | 75 |
| PA-374A | 21 MANUAL | 25 | 75 |
| PA-78 | 21 MANUAL | 15 | 75 |
| PA-77DX | 12-18 | 195 | 55 |
The 10 MHz band has a 200 watt power limitation. Accordingly we recommend against using your ALPHA on this band.
The ALPHA PA-77, 77Dx/Sx, 78, 76, 76A, 374 and 374A should not be used on 12m. The plate choke will overheat and burn on that band.
N4UQ may offer mods for some of the above amps for 12m : http://www.n4uq.com