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21. Re: [TenTec] Shields in Omni VI (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Mon, 27 Nov 2006 09:14:52 -0000; Ken, Gary, W7TEA, kindly sent me a photo of the underside of his early Omni VI+ which has the screening in place. There are no holes in my "inner panel" which would allow screens to be attached, so t; /archives//html/TenTec/2006-11/msg00398.html (9,089 bytes)
22. Re: [TenTec] Shields in Omni VI (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Mon, 27 Nov 2006 18:33:14 -0000; Hi Ken, Thanks for the suggestion. I don't believe it is a stage self-oscillating because the frequency is so stable once the rig has warmed up. I did a few measurements this morning. I was surprised; /archives//html/TenTec/2006-11/msg00409.html (11,967 bytes)
23. Re: [TenTec] Shields in Omni VI (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Wed, 29 Nov 2006 19:08:57 -0000; Folks, For those who may be interested, here are the comments from TT's service department: 1) Spurii "Some spurii, but not all, can be reduced by making sure that the mounting screws for the boards; /archives//html/TenTec/2006-11/msg00436.html (10,910 bytes)
24. [TenTec] Model 260 PSU problem (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Fri, 1 Dec 2006 19:23:22 -0000; Folks, It's turning into "one of those weeks"! I couldn't understand why my new Omni VI was "unhappy" at full power when fed from my Model 260 PSU, but was fine on the Hercules II supply. I just had; /archives//html/TenTec/2006-12/msg00000.html (7,572 bytes)
25. Re: [TenTec] Model 260 PSU problem (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Fri, 1 Dec 2006 22:41:39 -0000; Jerry, Thanks for your advice. I have catalogues for all the main UK component distributors, but none stock a diode bridge in the same package as the one in the Model 260. It's a package I've never s; /archives//html/TenTec/2006-12/msg00004.html (9,564 bytes)
26. Re: [TenTec] Model 260 PSU problem (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Sat, 2 Dec 2006 12:48:21 -0000; Jerry, Just to report that the PSU is now repaired and working well. I'll keep an eye on the Diode Bridge case temperature for a few days to check the heat-sinking is OK. Yes, I drilled a new hole mi; /archives//html/TenTec/2006-12/msg00009.html (9,457 bytes)
27. [TenTec] Happier OmniVI owner (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Sun, 10 Dec 2006 19:13:28 -0000; I can't fault those folk at Ten-Tec! Within a few days of e-mailing the Service Department I received a replacement for the "scratchy" AF/RF control on my recently-acquired OmniVI, together with a co; /archives//html/TenTec/2006-12/msg00223.html (7,664 bytes)
28. [TenTec] Omni VI agc modification (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Sun, 31 Dec 2006 19:49:10 -0000; Hi folks, Since I had my Omni VI I've been a bit disappointed with the agc characteristic - I guess I've become so used to my Corsair's "hang" system! I particularly like the way the background noise; /archives//html/TenTec/2006-12/msg00868.html (7,320 bytes)
29. Re: [TenTec] A grounding question (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Mon, 8 Jan 2007 18:13:21 -0000; I know some folk who take the "thin/wide" advice to its logical (and cheap) conclusion and use copper clad PCB material as a base on which all their equipment sits. They then use short/wide straps so; /archives//html/TenTec/2007-01/msg00166.html (8,983 bytes)
30. Re: [TenTec] Omni VI Audio level spread. (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Sat, 13 Jan 2007 20:28:36 -0000; Mike, Thanks for the useful tip. The Omni VI I bought recently had a "shot" AF gain pot. The track had totally worn at the "8/9 O'clock" position where all the action happens. Fortunately the guys at; /archives//html/TenTec/2007-01/msg00342.html (8,356 bytes)
31. Re: [TenTec] OMNI SIX problems (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Mon, 15 Jan 2007 20:47:26 -0000; For what it's worth ..... My Omni VI manual says to adjust R3 and R4 on the Tx Audio board (81597) for minimum carrier. These pots adjust the AC balance, and DC balance, respectively of U4 - the bala; /archives//html/TenTec/2007-01/msg00408.html (8,117 bytes)
32. [TenTec] Omni VI TCXO (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Sun, 21 Jan 2007 18:44:52 -0000; My Omni VI has a temperature-controlled oven for crystal oscillator stability. I believe that on later models TT used a TCXO for better stability / shorter warm-up time. I know that I can leave my ov; /archives//html/TenTec/2007-01/msg00653.html (6,783 bytes)
33. Re: [TenTec] Omni VI TCXO (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Sun, 21 Jan 2007 19:33:52 -0000; Paul, Thanks for the info. I've e-mailed TT to see if they still do the board. 73, Steve G3TXQ -- Original Message -- From: Paul Christensen To: Discussion of Ten-Tec Equipment Sent: Sunday, January; /archives//html/TenTec/2007-01/msg00655.html (8,160 bytes)
34. Re: [TenTec] Omni VI TCXO (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Tue, 23 Jan 2007 15:23:35 -0000; Folks, For anyone who may be interested, TT still carry the TCXO mod kit for the Omni VI - $66 shipped. With the pound so strong against the dollar I couldn't resist :) 73, Steve G3TXQ -- Original Me; /archives//html/TenTec/2007-01/msg00685.html (9,116 bytes)
35. [TenTec] 75 Ohm twin velocity factor ? (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Fri, 26 Jan 2007 16:54:42 -0000; Hi Folks, Sorry if this is a bit "off-topic" but ..... ..... does anyone know the typical velocity factor of commercial 75 Ohm twin feeder? I'm playing with alternative feed arrangements for my HexBe; /archives//html/TenTec/2007-01/msg00772.html (6,666 bytes)
36. Re: [TenTec] 75 Ohm twin velocity factor ? (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Fri, 26 Jan 2007 21:35:57 -0000; Folks, Thanks for all the responses on the Velocity Factor issue. I would expect 75 Ohm twin to have a lower VF than 300 Ohm or 450 Ohm line. With nothing but air between the conductors the limit on; /archives//html/TenTec/2007-01/msg00797.html (8,532 bytes)
37. Re: [TenTec] 75 Ohm twin velocity factor ? (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Fri, 26 Jan 2007 22:41:22 -0000; Jerry, Thanks for the correction. I've never come across the Zo formula involving a cosh function and for all these years have been using the log formula in "ignorant bliss". Just shows you're never; /archives//html/TenTec/2007-01/msg00805.html (10,492 bytes)
38. Re: [TenTec] 75 Ohm twin velocity factor ? (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Fri, 26 Jan 2007 23:05:57 -0000; Jerry, And some days you might learn 2 new things ....... My calculator doesn't have hyperbolic functions, but I found that Google does! Take a look at: http://www.googleguide.com/calculator.html Hav; /archives//html/TenTec/2007-01/msg00806.html (11,830 bytes)
39. Re: [TenTec] 75 Ohm twin velocity factor ? (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Sat, 27 Jan 2007 08:58:02 -0000; Duane, 75 ohm twin is still available here in the UK from at least one supplier. He has: "75 OHM TWIN.medium size..will take 400 watt PEP. HEAVY DUTY 75 OHM TWIN.made specially for us this is very ro; /archives//html/TenTec/2007-01/msg00831.html (10,963 bytes)
40. Re: [TenTec] 75 Ohm twin velocity factor ? (score: 1): Author: "Steve Hunt" <steve@karinya.net>; Date: Sat, 27 Jan 2007 09:07:19 -0000; Jerry, Despite using the wrong formula I guess I came to the right conclusion .... you can't get down to 75 Ohms without some "non-air" dielectric. I have three HP41C calculators (one in the house, o; /archives//html/TenTec/2007-01/msg00832.html (10,046 bytes)

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