Re: [Elecraft] Minor problem or K2 design quirk?
Don Wilhelm wrote: I only know of one other person who leaves their K2 powered on all the time - and Steve follows this reflector, so perhaps he will provide his experience. I don't yet, but I was considering leaving mine on 24/7 with some self-written software to scan a few beacon frequencies looking for band openings. I'm therefore also interested to hear how I might be affecting the life expectancy of the rig. I'd probably be band-changing more often than most of the other 24/7 K2s too, so any info on the expected lifetime of the relays would also be much appreciated. -- Nosey Nick Waterman, G7RZQ, K2 #5209. use Std::Disclaimer;[EMAIL PROTECTED] You never find the what you want, until you replace it. ___ 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] SSB Power
Don Wilhelm wrote: This can be observed easily on an oscilloscope - first observe the amplitude of your power setting in CW, and then switch to SSB. If the voice peaks come up to the same amplitude as you observed for the CW signal, you are achieving that same level of PEP (peak envelope power). The average power will be considerably less than the PEP power for SSB. I'm guessing, if you can produce a single nice clean sine wave on an audio frequency signal generator, sending a clean sine in SSB ought to be approximately equivalent to sending a single carrier in CW? -- Nosey Nick Waterman, G7RZQ, K2 #5209. use Std::Disclaimer;[EMAIL PROTECTED] You never find the what you want, until you replace it. ___ 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] SSB Power
Nick, No need to guess, that certainly is true - a single audio tone transmitted without a carrier present will produce a single signal at a frequency of the carrier + or - the tone pitch (depends on the sideband). The amplitude will of course depend on how strong the audio signal is, but it could develop as much as the CW signal before driving the signal into a non-linear region (that non-linear maximum will depend on the transmitter design - I do not believe that is any need for concern on the K2) 73, Don W3FPR -Original Message- Don Wilhelm wrote: This can be observed easily on an oscilloscope - first observe the amplitude of your power setting in CW, and then switch to SSB. If the voice peaks come up to the same amplitude as you observed for the CW signal, you are achieving that same level of PEP (peak envelope power). The average power will be considerably less than the PEP power for SSB. I'm guessing, if you can produce a single nice clean sine wave on an audio frequency signal generator, sending a clean sine in SSB ought to be approximately equivalent to sending a single carrier in CW? -- Nosey Nick Waterman, G7RZQ, K2 #5209. use Std::Disclaimer;[EMAIL PROTECTED] You never find the what you want, until you replace it. ___ 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] FS: XV50 FOR SALE
The XV50 has been sold. 73, Ken K3IU -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ken K3IU Sent: Saturday, February 11, 2006 8:59 AM To: elecraft@mailman.qth.net Subject: [Elecraft] FS: XV50 FOR SALE Hi All: I'm cleaning house and trying to raise funds. I have an XV50 6 meter transverter with the optional crystal oven (XVOVN) that just isn't getting used and is looking for a new home. Everything to spec. Manual, control cable, and power connectors included. Price: $425 + shipping Please respond directly. Thanks 73, Ken Wagner K3IU Portsmouth, RI ___ 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
[Elecraft] OLD Fluke 77 meter parts
Please forgive non Elecraft submission, but I have exhausted other means of help. Fluke was no help whatsoever. The meter is +15 yrs old and parts hard to find. Through a dumb operator error, I blew the 1 k, 2 watt fusible resistor, and need another one. I am using a 1 k, 2 watt plain resistor now, with no overload protection. I do not know the value of the fusible feature. Does anyone have an idea on this? Maybe I could put a fuse in series with the plain resistor, if I knew what value to use. The Fluke manual does not specify fuse value. Anyone know of a source for this part? I love this fine old meter, and would love to fix it properly. 73 from George, n4ym ___ 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] Test ignore
Jim 73 Jim VE3TTN ___ 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] SSB Power
Don, W3FPR wrote: No need to guess, that certainly is true - a single audio tone transmitted without a carrier present will produce a single signal at a frequency of the carrier + or - the tone pitch (depends on the sideband). The amplitude will of course depend on how strong the audio signal is, but it could develop as much as the CW signal before driving the signal into a non-linear region (that non-linear maximum will depend on the transmitter design - I do not believe that is any need for concern on the K2) A few of the 1960's-vintage SSB rig designs used exactly this method of producing CW. It quickly fell from favor because the suppression of the opposite sideband and even the carrier suppression often was not good enough to avoid unnecessary and perhaps illegal levels of spurious signals. Some SSB rigs had no more than 30 dB of opposite sideband suppression, perhaps less. That's about five S-units, so an S-9 signal would have a image signal at about S-4 somewhere between 1 and 2 kHz away (twice the modulating frequency). Ron AC7AC ___ 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 - removal of Digital Filter board
I am trying to tace a 2 x S point loss in my receiver. I want to remove the digital filter to remove that as a possibility. What pins on the control board do I put the jumpers - I cannot find this in the manual. I am off on holiday to Spain tomorrow and will take the K2 with me so that I can work on. Quick help appreciated John G4BOU ___ 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] NAQCC Sprint announcement
The NAQCC QRP CW Sprint for January is this coming Tuesday night February 14th from 8:30 to 10:30PM EST or, if you prefer, Wednesday Morning from 0130 - 0330 UTC. So if you can tear yourself away from your Valentine for a few hours - come and join us !!! This month's Sprint will be held on 80 Meters ONLY. The suggested starting point for participants is from 3.555 MHz to 3.565 MHz and there abouts. Please be considerate of non-contesting FISTS members who congregate around 3.558 MHz !!! Those who wish to initiate calls, please use CQ NA. The exchange is RST - SPC - NAQCC Member Nr. (for those who wish to participate that are not NAQCC members, simply substitute the member number with your output power. Please use a W to indicate that you are sending a power output figure! A bonus is awarded as follows: If you use only a straight key for the entire sprint, multiply your score by 2. If you use only a bug for the entire sprint, multiply your score by 1.5. If you use a keyer, keyboard, or computer, there is no bonus multiplier ALL amateurs may participate; but only those using QRP power levels may compete for awards. For details - please check: http://www.arm-tek.net/%7Eyoel/sprint200602.html To join the NAQCC please check: http://www.arm-tek.net/~yoel/joinup.html This month the contestant who racks up the highest score using an indoor antenna will be recognized with a certificate. For this purpose, an indoor antenna is defined as being an antenna where at least 50% of the radiating portion must be enclosed within a structure. All contest logs must be submitted by no later than 2400 UTC on February 21, 2006. Larry W2LJ NAQCC #35 ___ 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] FS: K2 + ant tuner
Illness forces sale: Original owner K2 #3876, professionally built, with internal ATU, likewise. No other modules. Flawless cosmetically and electrically (never used outdoors). $510 shipped in CONUS. 73 Gene N7YW 99.44% CW since 1958 ___ 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] SSB Power
On Fri, 10 Feb 2006 18:52:03 -0600, Matt Osborn [EMAIL PROTECTED] wrote: I'm not certain I know how to understand what it is I'm measuring. In my mind, I think much the 20 watts RF out of a CW signal is actually carrier and of not much use. When in SSB, I want to think that I can still put out the 20 watts, only now all concentrated in one sideband. Why does the power meter fail to show the 20 watts? Thanks for the all the replies. One of the difficulties of any new venture is comprehending what it is that we see. What I've learned here is that the V50 RF finals have a dynamic range of 20 watts and will supply what the input signal demands up to 20 watts. The CW signal, due to its increased intensity, demands more average power when compared to an SSB signal. Using the Elecraft two tone generator, I found that the 1900hz tone demands more power than the 700hz tone and when both tones are on, the demand approaches that of the CW signal and is confirmed by the power meter. Thanks again for the education. ___ 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] A few items for Sale.
Dear Gang: I have a few items for sale: 2- Power supplies - 2.5 amps and 10amps Not switching supplies) E.F. Johnson SWR Bridge with coupler. MFJ CW filter (outboard) 80,110,180. Dentron KW Super Tuner. (No meter) If anyone is interested contact me off the reflector [EMAIL PROTECTED] Paul Gates, KD3JF Elecraft Kits: K1 #0231 KX1 #1186 XG1: Signal Generator ___ 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] Elecraft CW Net Announcement
Good Evening, I wish I could do the voice over and silhouette when I write that :) However, I had better get this written before I do a face plant into the keyboard. I got quite a workout today so I am bushed. Relaxed but tired. After attacking the house with mop and broom, the dishes with a wash cloth, and then washing all the flat surfaces in sight I went walk about in search of trees ready to burn. Luck was with me. I found a number of 8 and 10 inch diameter trees which had lost their tops due to the heavy snows of three years ago. They were quite dead and dry. My biggest problem was making them drop through the thick growth of fir limbs surrounding them. I went through three tanks of gas with our trusty Stihl but have quite a pile of wood. Getting the bucked up wood back to the house was also a good way to expend energy. I used a wheelbarrow to cart loads uphill. I think I soaked through four layers of clothing so I needed plenty of water to get the next five loads out. Tomorrow I will not cut as much but will haul as much as I can move. The weather is pretty warm now, about 60 degrees at 2000 feet and much warmer in the valley. This is due to change I was told. Tuesday the snow level will drop to near 800 feet and then again on Thursday. This will most probably snow me in so I am hoping the electricity stays on then I can solder a few circuits. If not I can always rough out the plans for an RTOS I need for my robots. That will keep me busy ;) Enough digression, I am fading and will hit the hay soon. Tomorrow we shall run ECN at our new times once again. The sun does have a few tiny specks on it but one can never tell where one's signal will land. I'll toss it out in hopes that many of you can catch it. Otherwise listen for anyone calling CQ ECN. You never can tell who will be calling the net into your location. Good luck and see what happens is all I can say. Please join us: Sunday 2300z (Sunday 3pm PST) 14050 kHz Monday 0200z (Sunday 6pm PST) 7045 kHz Visit our web site: http://ecn.visionseer.com/ for further details. Thank you for the web space Dan. See you all tomorrow, Kevin. KD5ONS To sleep, perchance to dream (of Ms. P) Sorry Will :) KJR ___ 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
