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41. Re: [TenTec] power output of ten tec delta (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Sun, 2 Sep 2007 23:32:16 -0700; When I was first licensed in the UK (as G8UDP) in 1979 they used a similar scheme. http://www.ac6v.com/history.htm and How odd. I think the UK had already moved to PEP by then. Still think it was mar; /archives//html/TenTec/2007-09/msg00056.html (9,480 bytes)
42. Re: [TenTec] delta 580 on 10 meters? (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Thu, 6 Sep 2007 17:59:22 -0700; Or even easier when you disconnect the antenna does the noise go down? When you reconnect it does it go up? If you can hear the difference then the ambient noise + galactic noise is higher than the n; /archives//html/TenTec/2007-09/msg00154.html (11,975 bytes)
43. Re: [TenTec] delta 580 on 10 meters? (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Fri, 7 Sep 2007 09:25:07 -0700; What sort of noise environment do you live in? Urban? Suburban? Rural? Quiet rural? If you are at the bottom end of the scale (lucky you!) then there won't be much of a change and you'll be limited b; /archives//html/TenTec/2007-09/msg00170.html (10,617 bytes)
44. Re: [TenTec] Ten Tec Net Frequencies & Times? (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Mon, 10 Sep 2007 15:51:29 -0700; IS0 8601 (the common date time notation used all over the net) permits the hours to be between 00 and 24 (inclusive!). <http://en.wikipedia.org/wiki/ISO_8601> <http://www.cl.cam.ac.uk/~mgk25/iso-time; /archives//html/TenTec/2007-09/msg00220.html (12,047 bytes)
45. Re: [TenTec] corair p.s. with paragon? (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Tue, 11 Sep 2007 18:04:56 -0700; It's also an improvement over the Argosy design that routed AC from the PSU to the front panel on/off switch and back to the PSU. In the xcvr the AC lines pass the audio boards so after some noise qu; /archives//html/TenTec/2007-09/msg00235.html (10,764 bytes)
46. Re: [TenTec] (no subject) (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Sun, 23 Sep 2007 17:12:16 -0700; The transistor "fry" because they heat up, their current gain increases and the collector current runs away. <http://en.wikipedia.org/wiki/Thermal_runaway#Bipolar_transistors> You aren't going to be; /archives//html/TenTec/2007-09/msg00386.html (9,409 bytes)
47. Re: [TenTec] PA current control (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Sun, 23 Sep 2007 23:21:33 -0700; Curiously this system is not used in early TT rigs -- Argosy, which has a trip in the PSU or a Airpax. And the Omni D (but I'm replying on memory for that). I take it you have tested you hypothesis b; /archives//html/TenTec/2007-09/msg00390.html (13,450 bytes)
48. Re: [TenTec] PA current control (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Tue, 25 Sep 2007 09:46:56 -0700; Excellent thread highlighting a unique TT feature. So TT introduced this feature after the Delta/Cosair (and the Argosy) which seems to put the timeframe in the mid-1980s (perhaps) with the Paragon 1; /archives//html/TenTec/2007-09/msg00402.html (11,105 bytes)
49. Re: [TenTec] Argosy 525D setup... (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Wed, 26 Sep 2007 09:26:56 -0700; 525D spec <http://tentecwiki.org/doku.php?id=525d> There is a scan of the manual on the web (not perfect but not bad) for the final version of the 525D. This should get you operational. <http://www.q; /archives//html/TenTec/2007-09/msg00406.html (10,546 bytes)
50. [TenTec] Argosy 525/525D mixers and serial numbers revisited (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Wed, 26 Sep 2007 15:04:06 -0700; Thanks for your replies. I'm writing another reply but I realized that you help fill in more of the serial numbers on my list. See my old post <http://lists.contesting.com/archives//html/TenTec/2007-; /archives//html/TenTec/2007-09/msg00411.html (10,997 bytes)
51. [TenTec] Argosy RF attenuator mod (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Wed, 26 Sep 2007 15:21:10 -0700; Adding an attenuator to the Argosy is perhaps one of the best things you can do. The RF amp is always in circuit in the Argosy in front of the mixer which for the low bands is just not needed. The no; /archives//html/TenTec/2007-09/msg00412.html (9,184 bytes)
52. Re: [TenTec] paragon II performance on longwave band?? (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Wed, 26 Sep 2007 20:34:52 -0700; in partial response to John Ferro One additional point is the RX320 and RX320D both are much less sensitive below 1.8MHz. The issue on this radio is the input coupling transformer doesn't work as wel; /archives//html/TenTec/2007-09/msg00420.html (9,396 bytes)
53. Re: [TenTec] For Sale: Ten Tec Argonaut V (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Fri, 28 Sep 2007 14:02:52 -0700; OT ... delete now! Did this come up here (or QRP-L?) recently? It's an odd phrase (when you think about it) but it seems in common usage. Geeks nitpick about it all the time <http://zurich.ai.mit.edu; /archives//html/TenTec/2007-09/msg00437.html (9,305 bytes)
54. Re: [TenTec] WTB external speaker 307G (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Sun, 30 Sep 2007 15:14:11 -0700; I don't know if this is the G version or not but Universal Radio have one used on 09/28/07 (been on their list for some time). <http://www.universal-radio.com/alert.html> UI44 TEN-TEC 307 EXT. SPEAKE; /archives//html/TenTec/2007-09/msg00476.html (7,913 bytes)
55. Re: [TenTec] Tuning Rigs (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Mon, 1 Oct 2007 12:42:15 -0700; It could even be a useful retrofit into existing rigs -- especially easy in rigs that run 50 ohm connections between separate boards. A minor problem I see of putting it in the receive line is there; /archives//html/TenTec/2007-10/msg00044.html (8,765 bytes)
56. [TenTec] Argosy 525 identification: three different receiver mixersand serial numbers (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Mon, 1 Oct 2007 12:50:45 -0700; The current list with contributions from: VE7BGP, WA3FIY, N4NT, NN8B and NS1W. Thanks too all. 525 00721 1496 (Argosy front panel) VE7BGP 525 00748 1496 (Argosy front panel) NS1W 525 00895 4 diode mi; /archives//html/TenTec/2007-10/msg00045.html (8,237 bytes)
57. Re: [TenTec] dual receive (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Tue, 2 Oct 2007 19:00:30 -0700; I own a couple of them. The front end is not dissimilar to an Argosy (RF amp then homemade diode ring) but it's biggest problem is it is lacking preselection. So its exposed to every signal from MW t; /archives//html/TenTec/2007-10/msg00095.html (8,884 bytes)
58. Re: [TenTec] dual receive (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Tue, 2 Oct 2007 19:12:08 -0700; I really would have though the Jupiter would be better -- it probably is in real life with better preselection/LPF. The intercepts for the RX320 are not very impressive. ARRL RX320 review: Minimum di; /archives//html/TenTec/2007-10/msg00097.html (9,192 bytes)
59. Re: [TenTec] dual receive (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Tue, 2 Oct 2007 23:21:32 -0700; I can't believe I misread the schematic and missed the first mixer. I looked over the circuit diagram (after messing with my Argosy and Omni 546C) and that left an impression that they must be using; /archives//html/TenTec/2007-10/msg00103.html (13,745 bytes)
60. Re: [TenTec] dual receive (score: 1): Author: Kevin Purcell <kevinpurcell@pobox.com>; Date: Wed, 3 Oct 2007 10:36:03 -0700; I've wondered about this in the past too. Using "hand-built" mixers seems to be a part of the TT design style and has been for years. I would have though production costs would have swamped the compo; /archives//html/TenTec/2007-10/msg00115.html (9,295 bytes)

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