I made the mod for expanded coverage on the 2sat and here is the documentation I came up with. D9 was supposed to be removed. It already was in my unit but was installed in a second one I modded. Cut it out. It is located on small standup board after top and bottom are separated. D6 is changed from a 3 terminal diode with anode on right to one with diode on left. I found that the unit that had D9 did not have D6 and viseversa. Install D6 with diode on left. o ---------- | / | | / | __________ o o anode ^ Range and Mode documentation FM receive only down to 75 Mhz NBFM sensitivity @ 75 Mhz = 500 uv 90 Mhz = 100 uv 108 Mhz unit starts receiving equally well on am or fm. 2 uv 110 Mhz = 2 uv FM and 6 uv AM 120 Mhz = .5 uv FM and 2 uv AM 130 Mhz = .75 uv FM and 2 uv AM 131 Mhz the unlock "u" comes on but still receives same as 130 Mhz 135 Mhz = .75 uv FM and 2 uv AM "u" showing 138 Mhz unit switches off AM receiv and sens on FM = .3 uv Transmitter enabled and Hi power with internal bat = 1.9 w All indications good up to 162 Mhz where transmitter unlocks 165 Mhz sensitivity = .6 uv FM rec only 170 Mhz = 1.5 uv FM rec only 175 Mhz = 30 uv FM rec only 180 Mhz = 40 uv 193 Mhz = 50 uv "u" comes on 200 Mhz = No rec at all 204 Mhz unlock goes off and sens = 300 uv 204 - 220 sens dropps to barely receiving 20,000 uv 225 Mhz = 5000 uv 230 Mhz = 3000 uv 240 - 270 = 200 uv 280 Mhz 5 uv 290 Mhz = 1 uv up to 320 Mhz 320 - 367 Mhz = .6 uv 367 and above nothing Dial runs from 0 to 1310 Mhz 73, N5WX