RE: [Elecraft] xmit and receive frequencies different
Hi, Melin: Make sure you do NOT have either RIT or XIT enabled! That will cause exactly the symptom you are experiencing . Since the same BFO and Local Oscillator is used for both transmit and receive, those frequencies will be identical. The only thing that a misalignment in CAL FIL should cause is a shift in the apparent bandpass, not a shift in frequency. Since FL1 is *always* used for transmit, if you select FL1 for receive too nothing at all should change between transmit and receive - not even a shift in bandpass. Ron AC7AC > > My K2 (2631) with KSB2 doesn't transmit and receive on the same > frequency. There's about a 70Hz difference on lower sideband and 50Hz > on upper. The > transmit frequency is always lower than the receive frequency. > > Carrier supression is great, transmit audio sounds good, and I'm > within no more than 100Hz away from the suggested frequencies. The > package came with > 3.6Khz markings. > > I've run Cal PLL a number of times. The VFO is accurate and linear. > It just won't transmit and receive on the same frequency. > > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] xmit and receive frequencies different
Merlin, I believe a thorough filter alignment using Spectrogram to see the de-modulated audio spectrum will straighten things around for you. It is CAL FIL that you need to run, not CAL PLL, If you are not familiar with using Spectrogram for the K2 filter alignment, take a look at my webpage http://w3fpr.qrpradio.com ot the mirror at http://home.earthlink.net/~w3fpr - look on the left sidebar for the K2 Dila Calibration article - it gives information about accurately setting the K2 reference oscillator and Step 3 provides details on how to use Spectrogram for aligning the filters. 73, Don W3FPR > -Original Message- > > My K2 (2631) with KSB2 doesn't transmit and receive on the same > frequency. > There's about a 70Hz difference on lower sideband and 50Hz on > upper. The > transmit frequency is always lower than the receive frequency. > > Carrier supression is great, transmit audio sounds good, and I'm > within no > more than 100Hz away from the suggested frequencies. The package > came with > 3.6Khz markings. > > I've run Cal PLL a number of times. The VFO is accurate and linear. It > just won't transmit and receive on the same frequency. > > -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.338 / Virus Database: 267.10.13/78 - Release Date: 8/19/2005 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] xmit and receive frequencies different
You really need to use spectrograph to align your filters...your transmitter is probably on frequency it's just your filters aren't properly centered so your receive is off. Gregg R. Lengling, W9DHI, Un-Retired K2/100 SN 3075 http://www.milwaukeehdtv.org - Original Message - From: <[EMAIL PROTECTED]> To: Sent: Monday, August 22, 2005 12:35 PM Subject: [Elecraft] xmit and receive frequencies different Hi gang, My K2 (2631) with KSB2 doesn't transmit and receive on the same frequency. There's about a 70Hz difference on lower sideband and 50Hz on upper. The transmit frequency is always lower than the receive frequency. Carrier supression is great, transmit audio sounds good, and I'm within no more than 100Hz away from the suggested frequencies. The package came with 3.6Khz markings. I've run Cal PLL a number of times. The VFO is accurate and linear. It just won't transmit and receive on the same frequency. Any thoughts? Merlin, W3ICT [EMAIL PROTECTED] ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
