| Uniden HR2510 |
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| Expanded Channels 1) Locate pins 34 and 35 on IC315. 2) On the solder side of the synthesizer board, pins 34 and 35 are grounded by the same trace. With a razor-blade, cut this ground trace. 3) Locate resister pack RR301. Solder a jumper from pins 34 and 35 of IC315 to the left pin on this resister pack. You now have the following frequency ranges Band A 28.000-28.490 mhz Band B 28.500-28.900 mhz Band C 29.000-29.490 mhz Band D 29.500-29.990 mhz Band E 26.000-26.490 mhz Band F 26.500-26.490 mhz Band G 26.965-27.405 mhz Band H 27.000-27.490 mhz Band I 27.500-27.990 mhz Other Tips To increase AM reception, change D111 and D112 to a ECG583 or NTE583. To improve the mute circuit remove C139 and R199. To make the Roger Beep louder, change R96 to a 100k 1/8 watt resister. To change the duration of the Roger Beep, change C110 to a higher or lower pf rating. Make sure the replacement capacitor is at least 50 volts! The higher the capacitance the longer the beep. I have more mod info on this HR2510, but would like to research it more before I publish the results. Any questions or comments, Please E-mail me. |