Re: [Drakelist] R4C unstable VFO
I bought a TR-4CW/RIT off ebay and it would jump in frequency even when just listening. I found that one of those dumbell ceramic capacitors inside the PTO had a very small crack in it. I replaced the cap and all is well. 73, Joe Pyles KC9LAD. At 05:19 PM 8/19/2010, you wrote: Hi People, I've got an R4C that is jumping frequency by +- 1 Khz, then slowly returns to the correct frequency only to repeat again, and again. I have installed the ground strap mod, and exchanged several tubes, cleaned the switching, and checked all the RCA jacks on the rear panel. At this time I don't know where else to go. Has anyone had/ corrected this problem? Any help, or suggestions would be greatly appreciated. Tom ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] R4C unstable VFO
Sorry. Zener diode in the vfo Sent from my iPhone David Assaf, III On Aug 20, 2010, at 12:28 PM, David Assaf wrote: Change the 3zener diade in the CFO Sent from my iPhone David Assaf, III On Aug 19, 2010, at 4:19 PM, pony...@aol.com wrote: Hi People, I've got an R4C that is jumping frequency by +- 1 Khz, then slowly returns to the correct frequency only to repeat again, and again. I have installed the ground strap mod, and exchanged several tubes, cleaned the switching, and checked all the RCA jacks on the rear panel. At this time I don't know where else to go. Has anyone had/ corrected this problem? Any help, or suggestions would be greatly appreciated. Tom ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] R4C unstable VFO
Change the 3zener diade in the CFO Sent from my iPhone David Assaf, III On Aug 19, 2010, at 4:19 PM, pony...@aol.com wrote: Hi People, I've got an R4C that is jumping frequency by +- 1 Khz, then slowly returns to the correct frequency only to repeat again, and again. I have installed the ground strap mod, and exchanged several tubes, cleaned the switching, and checked all the RCA jacks on the rear panel. At this time I don't know where else to go. Has anyone had/ corrected this problem? Any help, or suggestions would be greatly appreciated. Tom ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] R4C unstable VFO
Hi People, I've got an R4C that is jumping frequency by +- 1 Khz, then slowly returns to the correct frequency only to repeat again, and again. I have installed the ground strap mod, and exchanged several tubes, cleaned the switching, and checked all the RCA jacks on the rear panel. At this time I don't know where else to go. Has anyone had/ corrected this problem? Any help, or suggestions would be greatly appreciated. Tom ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
