Re: [Repeater-Builder] Test measurements
stanleyradio wrote: Hi all, I am trying to tune up my duplexed E.F. Johnson PPl 6060 on the 440 band. There are some directions on the repeater-builder site that dictate measuring the oscillator voltages with an analog voltmeter. I should be trying to measure AC voltage, right? No, DC voltages Also, it seems that when I try to use my improvised signal generator (handheld radio) anywhere near my voltmeter its readings fluctuate all over the scale. What am I doing wrong, or does my voltmeter just suck? Once you switch to DC, your fluctuations should be at a minimum. Kevin Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Test measurements
Dayne, No, the majority of voltage readings taken during alignment are DC, and should be made with a high-impedance DVM or VTVM. The only AC measurements needed are for squelch setting. This info comes from my PPL-6060 service manual. Most DVMs don't function well in a high RF field, so keep your handheld radio away from it while taking readings. 73, Eric Lemmon WB6FLY stanleyradio wrote: Hi all, I am trying to tune up my duplexed E.F. Johnson PPl 6060 on the 440 band. There are some directions on the repeater-builder site that dictate measuring the oscillator voltages with an analog voltmeter. I should be trying to measure AC voltage, right? Also, it seems that when I try to use my improvised signal generator (handheld radio) anywhere near my voltmeter its readings fluctuate all over the scale. What am I doing wrong, or does my voltmeter just suck? Thanks, Dayne Olmstead KD7JAH Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Test measurements
One trick on setting up a RX using a improvised sig gen... After the receiver is tuned into the neighborhood, don't use the TX in the handheld. Look up in your owners manual and find out what the radio uses for the high IF and calculate what frequency you'd punch into the RX to place the local oscillator right on the frequency of interest. Then use the LO as a source for the final tuning. You may have to use a scanner if your handheld won't go there. Mike WA6ILQ At 10:44 AM 10/10/04, you wrote: Dayne, No, the majority of voltage readings taken during alignment are DC, and should be made with a high-impedance DVM or VTVM. The only AC measurements needed are for squelch setting. This info comes from my PPL-6060 service manual. Most DVMs don't function well in a high RF field, so keep your handheld radio away from it while taking readings. 73, Eric Lemmon WB6FLY stanleyradio wrote: Hi all, I am trying to tune up my duplexed E.F. Johnson PPl 6060 on the 440 band. There are some directions on the repeater-builder site that dictate measuring the oscillator voltages with an analog voltmeter. I should be trying to measure AC voltage, right? Also, it seems that when I try to use my improvised signal generator (handheld radio) anywhere near my voltmeter its readings fluctuate all over the scale. What am I doing wrong, or does my voltmeter just suck? Thanks, Dayne Olmstead KD7JAH Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
