President 2510 NO FM RX just white noise
Posted: Thursday 3rd Mar 2011, 20:04
Radio Make and Model: President HR2510
PCB Number: PB-111AD 1980 Uniden ( or 1988 looks like 1980 on silk screened numbers )
PLL Number: UC1201
Test gear available: o-scope, v/ohm meter 7 digit cpi counter with probes and RF input SO 239 connectors
Symptoms: No FM RX just white noise, no RF gain control on FM Rx, NOTE : i can hear FM Rx signal if I transmit on a test radio on same bench with the 2510's RF gain wide open if turned down nothing but white noise also test radio has to be on same bench or right next to 2510 I don't think if some one across the street transmitted on FM on a test radio i would hear them i can see a little movement in the needle of a other signal if some one is on am mode but no am scratch or ssb scratch while in FM
What is working: TX: AM./SSB/CW/ FM RX: AM/SSB/ CW
What has been tried: Adjusted L401 on FM PC board as per 2510 service manual Alignment instructions just made things a bit cleaner on the lose up FM Rx with test radio but no improvement to anything else as far as non next to test radio on FM TX on bench still white noise and no normal FM Rx no RF Gain control in FM
Did it suddenly happen ?: No i got the radio this way
Anything else that may be of help?: this is President 2510 Version 1
amber display, factory talkback (i have since removed the talkback) the version that goes 26.000 Mhz to 29.999 mhz
Rick or Scott any ideas?
i love my 2510 everything else works super on it would just like the FM to also work as some of us here in the states use Fm mode
PCB Number: PB-111AD 1980 Uniden ( or 1988 looks like 1980 on silk screened numbers )
PLL Number: UC1201
Test gear available: o-scope, v/ohm meter 7 digit cpi counter with probes and RF input SO 239 connectors
Symptoms: No FM RX just white noise, no RF gain control on FM Rx, NOTE : i can hear FM Rx signal if I transmit on a test radio on same bench with the 2510's RF gain wide open if turned down nothing but white noise also test radio has to be on same bench or right next to 2510 I don't think if some one across the street transmitted on FM on a test radio i would hear them i can see a little movement in the needle of a other signal if some one is on am mode but no am scratch or ssb scratch while in FM
What is working: TX: AM./SSB/CW/ FM RX: AM/SSB/ CW
What has been tried: Adjusted L401 on FM PC board as per 2510 service manual Alignment instructions just made things a bit cleaner on the lose up FM Rx with test radio but no improvement to anything else as far as non next to test radio on FM TX on bench still white noise and no normal FM Rx no RF Gain control in FM
Did it suddenly happen ?: No i got the radio this way
Anything else that may be of help?: this is President 2510 Version 1
amber display, factory talkback (i have since removed the talkback) the version that goes 26.000 Mhz to 29.999 mhz
Rick or Scott any ideas?
i love my 2510 everything else works super on it would just like the FM to also work as some of us here in the states use Fm mode