Re: [drakelist] RV7 jumping frequency
Ron Wagner <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- Can anyone tell me if their RV7 shows the following symptom? When you trip the TX relay (either with PTT or VOX) the TR7 frequency display jumps in frequency. It seems to always be up in frequency and anywhere from 200 to 700 hertz. It then very quicky returns to the frequency I am dialed to. My internal PTO does not seem to show this symptom. I can not see any variance in the voltages on the RV7. I had to use an FET analog meter because the o-scope is playing dead :-( Maybe the voltage change is fast enough that the damping on my FET VOM is missing it? I do not have the RIT on. TNX es 73, Ron WD8SBB -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
RE: [drakelist] RV7 jumping frequency
Regarding the VFO jumping, it may be as simple as dried & thick grease. If the VFO jumps a couple of hundred cycles especially just after making an adjustment, or doesn't seem to stay where you put it, that may be your problem.I can't begin to count the number of TR7 and RV7 VFO's for that problem.The cure is to remove all the old grease and repack the bearing and lubricate sparingly. Be prepared to do a VFO alignment after you reassemble the tuning assembly. Ron / WB4HFN _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Tuesday, January 01, 2008 6:01 PM To: [EMAIL PROTECTED] Subject: Re: [drakelist] RV7 jumping frequency [EMAIL PROTECTED] made an utterance to the drakelist gang -- As an addendum, I've experienced such problems on several rigs due to a ground connection that was intermittant, going high resistance, etc. ** See AOL's top rated recipes (http://food.aol.com/top-rated-recipes?NCID=aoltop000300 0004) -- Submissions: [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] RV7 jumping frequency
[EMAIL PROTECTED] made an utterance to the drakelist gang -- As an addendum, I've experienced such problems on several rigs due to a ground connection that was intermittant, going high resistance, etc. **See AOL's top rated recipes (http://food.aol.com/top-rated-recipes?NCID=aoltop000304) -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] RV7 jumping frequency
Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- Ron - Wandering PTO's can be caused by several things. One is the 10V internal Zener has croaked, another is a noisy analog switch (4016) on the RIT controller, a flaky 10 uF electrolytic inside the PTO or a bad 2N5950 FET. I'd check the +10V and the RIT control line to see if you can correlate the frequency shift to a voltage shift. If those are stable, it's most likely the FET. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B & C-Line Service Supplement CDs Ron Wagner wrote: Ron Wagner <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- Okay, I admit, I am going to ask before I even look inside my RV7. Yesterday while I was running an HF net, my RV7 decided to go "screwy". It jumped 200 hz up, down, and more or less all around. I saw this on the digital readout and the net also mentioned it. I swapped to the rig VFO and continued the net, and after net QSOs just fine. Seemed to be mostly during TX. Any ideas where to start? I am thinking maybe the connector needs cleaned and DeOxit, or the 10V zenner? Or something that caused the voltage or load to move erratically. I have had a blue LED bulb in it for a couple years now, so it shouldn't be that. BTW since the LED conversion, the RV7 has been the more stable VFO on the rig. That is until yesterday. TNX es 73, Ron -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
[drakelist] RV7 jumping frequency
Ron Wagner <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- Okay, I admit, I am going to ask before I even look inside my RV7. Yesterday while I was running an HF net, my RV7 decided to go "screwy". It jumped 200 hz up, down, and more or less all around. I saw this on the digital readout and the net also mentioned it. I swapped to the rig VFO and continued the net, and after net QSOs just fine. Seemed to be mostly during TX. Any ideas where to start? I am thinking maybe the connector needs cleaned and DeOxit, or the 10V zenner? Or something that caused the voltage or load to move erratically. I have had a blue LED bulb in it for a couple years now, so it shouldn't be that. BTW since the LED conversion, the RV7 has been the more stable VFO on the rig. That is until yesterday. TNX es 73, Ron -- Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
