[Elecraft] [K2] Transmitted Phase Noise
Dear All, A quick search on Nabble produced some posts from several years back discussing the transmitted phase noise present when using the K2 with the KPA100 PA stage. However, I was unable to find any firm conclusions to these discussions i.e. a response from Elecraft itself. Now it may well be that the output of the K2 conforms to FCC regulations. However, if the level of phase noise is far greater than that of other commercial transceivers then I see this as being a problem. I am the owner and builder of K2 #6593 and am currently considering building the KPA100. It is for this reason that I am keen to receive any thoughts/conclusions on this matter. Regards, Merlin Cooper M0TRX -- View this message in context: http://n2.nabble.com/-K2--Transmitted-Phase-Noise-tp2621826p2621826.html Sent from the Elecraft mailing list archive at Nabble.com. __ 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
Re: [Elecraft] K2 Transmitted Phase Noise?
Kenneth Silverman wrote: Do K2/100's have a known transmitted phase noise issue? I looked at the reflector archives, and there was some comment by K6SE (SK) in 2005 that seemed to indicate there was, but the scenario seemed rather specific. I used a pair of K2/100's as a SO2R pair for 5 years. I never felt that TX phase noise was a limitation for me. I could listen quite well on other bands except near the harmonics of the transmitter. This is at either 100W or 1500W level. I have ICE bandpass filters and stubs and most of my antennas have reasonable isolation. Tor N4OGW -- View this message in context: http://n2.nabble.com/K2-Transmitted-Phase-Noise--tp1298858p1303639.html Sent from the Elecraft mailing list archive at Nabble.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
Re: [Elecraft] K2 Transmitted Phase Noise?
On Sun, 5 Oct 2008 10:52:35 -0400, Kenneth Silverman wrote: Do K2/100's have a known transmitted phase noise issue? YES! When I moved from Chicago to Santa Cruz, I was using it as my primary CW contesting rig, driving a Ten Tec Titan amp. K6XX and W0YK lost no time informing me that I was broad. Switched to the TS850 and they were happy. I later learned that W0YK switched away from a K2/100 for the same reason. 73, Jim K9YC ___ 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] K2 Transmitted Phase Noise?
Yes and no. The transmitted phase noise on the K2/100 is well within FCC regs. However, when driving a 1.5 KW linear in close proximity (few miles line-of-sight) to other contesters, it was bothersome for weak signal reception. That was the primary reason I abandoned the K2/100 for SO2R and contesting (at home) in general. As you know, it has an excellent receiver and handles DX and contest expedition pile-ups excellently. It just isn't friendly with other close-by receivers when running QRP. It should be fine if you do another QRP contest expedition. ;) 73, Ed - W0YK _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kenneth Silverman Sent: Sunday, 05 October, 2008 07:53 To: elecraft@mailman.qth.net Subject: [Elecraft] K2 Transmitted Phase Noise? Do K2/100's have a known transmitted phase noise issue? I looked at the reflector archives, and there was some comment by K6SE (SK) in 2005 that seemed to indicate there was, but the scenario seemed rather specific. Last year as C6ATA I ran in-band SO2R on 40m using a K2/100 (s/n 2773) and a TS-850. Both were low power. The antennas were verticals on the beach, and a dipole about 400' away. When transmitting on the TS-850, I could listen to the weakest of stations on the K2 within 2 kc of the TS-850's freq. Though when transmitting on the K2, there was wide-band noise on the TS-850, covering up a layer or two of signals. It didnt matter which rig was using which antenna, the results were the same. I tend to think this was a TX phase noise issue, and not a more robust RX in the K2. Can anyone shed some light? If this is an issue, is there any resolve? Many thanks, Kenny K2KW ___ 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] K2 Transmitted Phase Noise?
Do K2/100's have a known transmitted phase noise issue? I looked at the reflector archives, and there was some comment by K6SE (SK) in 2005 that seemed to indicate there was, but the scenario seemed rather specific. Last year as C6ATA I ran in-band SO2R on 40m using a K2/100 (s/n 2773) and a TS-850. Both were low power. The antennas were verticals on the beach, and a dipole about 400' away. When transmitting on the TS-850, I could listen to the weakest of stations on the K2 within 2 kc of the TS-850's freq. Though when transmitting on the K2, there was wide-band noise on the TS-850, covering up a layer or two of signals. It didnt matter which rig was using which antenna, the results were the same. I tend to think this was a TX phase noise issue, and not a more robust RX in the K2. Can anyone shed some light? If this is an issue, is there any resolve? Many thanks, Kenny K2KW ___ 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
