| Amplifier Keying Parameters (RELAY jack) | ||
| MODEL | UNKEYED | KEYED |
| 99 | 25 vdc | 7 ma |
| 91B | 25 vdc | 7 ma |
| 89 | 12 vdc | 12 ma |
| 87A | 5 vdc | 1 ma |
| 86 | 10 vdc | 1 ma |
| 78 | 23 vdc | 3 ma |
| 77Sx / 77Dx | 20 vdc | 2 ma |
| 77 | 55 vdc | 85 ma |
| 76 / 76P / 76C | 25 vdc | 75 ma |
| 76A / 76PA / 76CA | 25 vdc | 75 ma |
| 374A | 25 vdc | 75 ma |
| 374 / 274 | 23 vdc | 95 ma |
(All Alpha amps need RELAY jack shorted to ground to enable transmit)
Last Updated on 26-May-03
By ALPHA/POWER