How can you detect the drifting if RF if Iyou have to turn off the K-3 and the P3?
Sent from my iPhone > On Jun 20, 2016, at 1:06 PM, G4GNX <[email protected]> wrote: > > FWIW I still have a few issues with RFi, but I've managed to cure two of the > major ones, the rest are a matter of finding time. > > At present, I'm running an MFJ 1500W auto-tuner which needs a 12V supply for > the display, logic and relays. I had a massive drifting "birdie" on 40 > metres, but it didn't always appear on the same frequency. I found that it > shifted frequency with minor changes in load, caused by using different > relays within the tuner. I replaced the switch mode PSU and all is now good. > > The second major issue was mainly on 2 metres, but there were also sprogs on > other bands. This turned out to be a PC PSU which despite an application of > ferrite rings, would not lie down! I found that if the PC was put into > 'sleep' mode, it would go quiet. I finally replaced the PSU - problem solved. > > Just a few thoughts on what you might look for. > > 73, > > Alan. G4GNX > > -----Original Message----- From: Clay Autery > Sent: Monday, June 20, 2016 5:41 PM > To: [email protected] > Subject: Re: [Elecraft] RFI on K3s > > Marc and Drew, > > Appreciate the feedback... Checking my PS is my first test. Will power > off all circuits except the one to my shack that runs the AC to the PS. > Then I'll A/B with radio on battery and on the PS. (PS > air-gapped/unplugged when on batt). > If it is the PS, I'll try to choke the I/O power leads first before > doing anything else. > > I've a strong feeling it is NOT the SS-30DV... My antenna is an 80m > loop outside at 38-40 feet. Fed with 300 ladder to the 6:1 balun. Only > 15-20 feet of coax total (LMR240-DB with N-Connectors) direct from balun > to radio. > > Before I do anything beyond IDing culprits, I have to address other > shortcomings first: 1) Insufficient service ground, 2) no shack ground, > 3) no bond from non-existent shack ground to service ground. :( > Knew I should have done those things BEFORE I went OTA... the mic/K3 is > a huge distraction from my TO DO list. ;) > > 73, > > ______________________ > Clay Autery, KY5G > MONTAC Enterprises > (318) 518-1389 > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
