Oops. My bad! Sent from my iPhone ...nr4c. bill
> On May 23, 2019, at 1:36 PM, Hank <h...@optilink.us> wrote: > > > Not the ATU, the ATT (attenuation function). > > > ----- Original Message ----- > From: Nr4c (n...@widomaker.com) > Date: 05/23/19 13:34 > To: Hank (h...@optilink.us) > Cc: Hank Blackwood (k4...@arrl.net), Elecraft Reflector > (elecraft@mailman.qth.net) > Subject: Re: [Elecraft] K144XV issues in K3S > > Frequency drift comes to mind. > > The HF ATU probably won’t do anything for VHF. > > Let the radio warm up for half an hour before doing anything with VHF. > > Remember 1PPM at VHF is 144 Hertz. > > You need the high def oscillator and maybe the Ref In. > > Sent from my iPhone > ...nr4c. bill > > >> On May 23, 2019, at 1:05 PM, Hank <h...@optilink.us> wrote: >> >> >> Hey Folks... >> >> I have noticed 2 unusual issues with my recently installed K144XV. I bought >> it used from a list member and installed it a few months ago. It seems to >> work ok but after some extended use (which recently begun) it is does 2 >> things: after it has been in use (even just monitoring) for local FM >> repeater work, the S-Meter on the K3S starts to read lower and lower (by as >> much as 3 S-Units) for the same repeater signal; and 2 - the audio becomes a >> little distorted on stronger signals (the ATT makes no difference in the >> audio distortion). >> >> The audio happens almost immediately after turning up the rig, but the >> signal "weakening" takes 10 to 15 minutes of the transverter being active >> (active band on K3S). It will occur faster it is being used (transmitting). >> I have it set to very low power (display reads -6db), and it will still >> show "weakening" on the S-Meter during reception after using it. I noticed >> it fist doing some longer packet transmissions, but it will also happen >> after a period of time of just listening. >> >> The audio distortion is not as noticeable on signals below S-9, but >> listening in headphones will reveal the distortion is still there. >> >> >> The K3S currently has the standard TXCO installed and no reference lock on >> the K144XV. The 13khz filter is installed in the main receiver. I have no >> external reference board installed in the K3S. I have ordered the higher >> stability TXCO for the K3S and the K144XV reference lock, but have not >> received them yet from Elecraft. >> >> >> The audio on HF is OK and the S-Meter does not seem to "weaken" in a similar >> fashion when monitoring strong net signals over time. >> >> >> Any ideas? >> >> Hank >> K4HYJ >> K3S, P3, KX3 >> >> >> >> >> >> >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
