- 21. [TenTec] Old Pushbutton Switches (score: 1)
- Author: kb1ckt@yahoo.com (Shawn Upton)
- Date: Mon, 14 May 2001 14:16:50 -0700 (PDT)
- Does anyone know of a source to replace the zero beat, momentary-close, pushbutton switch on my Century 21? I used a bit too much heat; it still works but I wouldn't mind investigating the cost of re
- /archives//html/TenTec/2001-05/msg00126.html (6,725 bytes)
- 22. [TenTec] Argosy Mod Question (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Sun, 11 Jun 2006 18:03:48 -0700 (PDT)
- I finally am getting around to modding my Argosy I with the mods listed on the unofficial pages. I couldn't find the diodes listed, but made some substitutions: 5082-2800: these were for the mixer di
- /archives//html/TenTec/2006-06/msg00208.html (8,133 bytes)
- 23. [TenTec] Argosy I: Mixer Balance (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Sat, 17 Jun 2006 12:32:47 -0700 (PDT)
- Ok, getting it back together now. Does seem better, but I have a low frequency hum still--maybe it's from the PS, as I cut the AC wires and shorted them out, so the wires no longer run across the rig
- /archives//html/TenTec/2006-06/msg00325.html (8,030 bytes)
- 24. Re: [TenTec] Ham Radio (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Thu, 6 Jul 2006 17:20:01 -0700 (PDT)
- That would be cool. Simple setup, PTO, quiet frequency readout (or at least an output jack for external freq meter), QSK, a "real" CW transciever for the CW person with maybe 50W or so. The C21 setup
- /archives//html/TenTec/2006-07/msg00149.html (10,212 bytes)
- 25. Re: [TenTec] 6N2 observations (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Sun, 9 Jul 2006 15:19:35 -0700 (PDT)
- Besides, wouldn't a preamp be best anyhow on 2m and up, to help with NF and coax loss? It's another part, yes; but since no coax is lossless and that also impacts noise figure, a preamp might as well
- /archives//html/TenTec/2006-07/msg00197.html (9,697 bytes)
- 26. [TenTec] Argosy I "Thump"? (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Sat, 12 Aug 2006 14:20:44 -0700 (PDT)
- I've been messing with my Argosy I off and on for about a year now. I did do the inductor mod on the AF board; but got alot of 60Hz noise, inspite of clipping the AC wires going into the radio. So ou
- /archives//html/TenTec/2006-08/msg00437.html (7,917 bytes)
- 27. Re: [TenTec] Argosy I "Thump"? (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Sun, 13 Aug 2006 06:05:11 -0700 (PDT)
- I think I know what it was: when the band noise is high enough for it AGC normally (as in, S meter sits at say S3), the noise is very loud until the AGC reduces gain. Takes time for an audio derived
- /archives//html/TenTec/2006-08/msg00443.html (8,004 bytes)
- 28. Re: [TenTec] Argosy I "Thump" (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Wed, 16 Aug 2006 18:57:46 -0700 (PDT)
- That's what I was starting to think, it was to do with the speed at which the audio derived AGC could respond. Lately, as I play on 80m, I've been wondering what I could do, perhaps disable AGC and c
- /archives//html/TenTec/2006-08/msg00497.html (8,190 bytes)
- 29. Re: [TenTec] Argosy I "Thump" (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Thu, 17 Aug 2006 16:14:41 -0700 (PDT)
- Interesting, hadn't thought of that. Too bad the Argosy lacks an RF gain. One step at a time. Shawn Upton, KB1CKT __________________________________________________ Do You Yahoo!? Tired of spam? Yah
- /archives//html/TenTec/2006-08/msg00519.html (8,745 bytes)
- 30. Re: [TenTec] Argosy I "Thump" (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Thu, 17 Aug 2006 16:32:02 -0700 (PDT)
- Sorry, didn't realize it had been answered a couple of times. I also have been basing my mods on the posted link; the recieve seemed pretty good, although it may need some more work: Was qso'ing the
- /archives//html/TenTec/2006-08/msg00520.html (8,467 bytes)
- 31. Re: [TenTec] Century 21 (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Sun, 20 Aug 2006 17:00:34 -0700 (PDT)
- They sold the kits a few years ago, I think they still do. Couple hours of work, not too bad. Here is a good page on how to do it: http://www.io.com/~n5fc/c21_pto.htm I think I mused about putting th
- /archives//html/TenTec/2006-08/msg00613.html (10,463 bytes)
- 32. Re: [TenTec] Century 22 Question (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Tue, 5 Sep 2006 19:11:24 -0700 (PDT)
- What's wrong with tapping off the PTO? The TenTec PTO's I've seen seem to have a decent amount of drive, and the freq displays have a decent input impedance--meaning low loading. I suppose you could
- /archives//html/TenTec/2006-09/msg00090.html (8,520 bytes)
- 33. Re: [TenTec] Century 22 Question (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Thu, 7 Sep 2006 16:57:32 -0700 (PDT)
- Nope. I recall looking at it when I owned one, and being sad that it couldn't be converted to a superhet--so it stands out in my mind. The band is first down converted to 5-5.5MHz, and then the PTO o
- /archives//html/TenTec/2006-09/msg00123.html (11,620 bytes)
- 34. Re: [TenTec] Coaxial Ground (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Mon, 16 Oct 2006 16:44:12 -0700 (PDT)
- I thought most coax was right around 30pF per foot, regardless of size--the characteristic impedance is sqrt(L/C), and inductance is a weak function of wire diameter. So I don't think it'd matter wha
- /archives//html/TenTec/2006-10/msg00446.html (7,878 bytes)
- 35. Re: [TenTec] Coaxial Ground (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Mon, 16 Oct 2006 17:25:46 -0700 (PDT)
- Ah, I was thinking 50 ohm only: my handbook as a spread of 26pF/foot up to 30.8pF/foot for 50 ohm-ish coax. Foam seems to have some effect, not what I'd call alot (sometimes it changes, sometimes not
- /archives//html/TenTec/2006-10/msg00451.html (8,565 bytes)
- 36. Re: [TenTec] 75 Ohm twin velocity factor ? (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Sat, 27 Jan 2007 09:27:41 -0800 (PST)
- This keeps coming up from time to time... Early 80's IIRC in QST. 105 ohms, losses started getting appreciable above 10MHz. I think DeMaw (or one of the other "big names") did the article. Shawn KB1C
- /archives//html/TenTec/2007-01/msg00848.html (10,688 bytes)
- 37. Re: [TenTec] Is there a beefier 2N5301? (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Tue, 6 Mar 2007 16:15:43 -0800 (PST)
- What's wrong with a fan, or a couple of small ones? The cheap PC ones won't last long, but should do alot for continous duty heat dissapation. Responding to an earlier post: it's better to use too li
- /archives//html/TenTec/2007-03/msg00132.html (9,197 bytes)
- 38. Re: [TenTec] Kits Discontinued. (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Sun, 11 Mar 2007 17:57:23 -0700 (PDT)
- I think it'll still be around; the biggest cost will be the surface finish of the PCB. Low cost RoHS boards do not have a long shelf life (the solder finish corrodes quickly); the better boards cost
- /archives//html/TenTec/2007-03/msg00278.html (9,658 bytes)
- 39. [TenTec] Argosy I Price? (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Fri, 24 Aug 2007 11:05:57 -0700 (PDT)
- I'm contemplating selling my rough Argosy I, and I figure I need a reasonable price for it. Power supply, optional crystal filters, no calibration or audio filter boards. Dial cord slips, lots of dee
- /archives//html/TenTec/2007-08/msg00356.html (7,745 bytes)
- 40. Re: [TenTec] ten tecs have 100 watts out on carrier?? (score: 1)
- Author: Shawn Upton <kb1ckt@yahoo.com>
- Date: Sun, 30 Sep 2007 14:31:01 -0700 (PDT)
- Fundamentally, a carrier is a carrier. A CW carrier is modulated on/off, while an AM carrier is constant (for the duration of the transmission that is). However, the peak output power for a given tra
- /archives//html/TenTec/2007-09/msg00474.html (10,553 bytes)
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