1650H,TRANSFORMER AUDIO 6.6KCT 40W
1650HA,AUDIOPHILE TUBE OUTPUT TRANSFRMR
1650K,TRANSFORMER AUDIO 3.4KCT 50W
1650KA,AUDIOPHILE TUBE OUTPUT TRANSFRMR
1650KP,TRANSFMR AUDIO 3.4KCT 4/8/16 IMP
1650N,TRANSFORMER AUDIO 4.3KCT 60W
1650NA,AUDIOPHILE TUBE OUTPUT TRANSFRMR
1650P,TRANSFORMER PUSH-PULL OUTPUT
