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References: [ +from:ITR@nanoteq.co.za: 108 ]

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21. [AMPS] AMERITRON AL80A (score: 1): Author: ITR@Nanoteq.co.za (Ian Roberts); Date: Tue, 17 Oct 2000 09:06:55 +0200; Y'know, this statement keeps popping up, supposed to happen apparently even when simply placed in TX, without any drive. The 3-500's in my SB-220 don't glow noticeably at 400 W RTTY. Only ever seen; /archives//html/Amps/2000-10/msg00423.html (8,733 bytes)
22. [AMPS] AMERITRON AL80A (score: 1): Author: ITR@Nanoteq.co.za (Ian Roberts); Date: Tue, 17 Oct 2000 09:14:43 +0200; Rich, are you of the opinion that gettering is a false concept? In any case, 1400 deg C seems be to mighty hot (white hot?) Ian ZS6BTE -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: a; /archives//html/Amps/2000-10/msg00424.html (9,409 bytes)
23. [AMPS] Commercial amp design on AMPS (score: 1): Author: ITR@Nanoteq.co.za (Ian Roberts); Date: Tue, 17 Oct 2000 09:55:22 +0200; Tom, a fellow just sent me a private e-mail accusing me of "as usual" supporting someone else on this reflector. My advice to him was to remember that at the end of the day, it's pure ham. Unfortunat; /archives//html/Amps/2000-10/msg00425.html (8,687 bytes)
24. [AMPS] RF high power tube (score: 1): Author: ITR@Nanoteq.co.za (Ian Roberts); Date: Mon, 23 Oct 2000 09:40:17 +0200; For those mining coal and pumping steam, these references to solid state megawatt devices are best ignored.... Ian ZS6BTE -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contestin; /archives//html/Amps/2000-10/msg00511.html (7,515 bytes)
25. [AMPS] Re: G2DAF Amps Circuit (score: 1): Author: ITR@Nanoteq.co.za (Ian Roberts); Date: Thu, 26 Oct 2000 08:47:34 +0200; We have established already that this DAF thing is probably fine business in key down use such as FM, AM, RTTY, SSTV etc, etc. but is probably worst at SSB. It may be OK on CW. These guys in SM shoul; /archives//html/Amps/2000-10/msg00554.html (9,095 bytes)
26. SV: [AMPS] Portable linear using a DAF? (score: 1): Author: ITR@Nanoteq.co.za (Ian Roberts); Date: Tue, 31 Oct 2000 15:36:47 +0200; The ICOM switchers are amongst the worst, read about it in recent issues of QST, despite ICOM's advertising pull.... On the other hand, some of the third party SMPSUs had spectrum performance not muc; /archives//html/Amps/2000-10/msg00704.html (8,306 bytes)
27. [AMPS] wanted SB 220 bandswitch (score: 1): Author: ITR@Nanoteq.co.za (Ian Roberts); Date: Fri, 22 Sep 2000 08:18:36 +0200; If a spare is floating around, please contact me, I need one. Cheers, Ian ZS6BTE -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUE; /archives//html/Amps/2000-09/msg00943.html (6,560 bytes)
28. [AMPS] wanted SB 220 bandswitch (score: 1): Author: ITR@Nanoteq.co.za (Ian Roberts); Date: Tue, 26 Sep 2000 11:31:49 +0200; This is probably the no 1 failure mode in SB220s, apart from natural old auge in the bandswitch. I have on occasion also fingered the wrong switch, but fortunately not being a contest op, twigged th; /archives//html/Amps/2000-09/msg01012.html (9,656 bytes)
29. [AMPS] AL-80B Amps (score: 1): Author: ITR@Nanoteq.co.za (Ian Roberts); Date: Wed, 27 Sep 2000 14:51:20 +0200; If your saying these guys are fearless, I agree with you..... Ian ZS6BTE -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@conte; /archives//html/Amps/2000-09/msg01092.html (8,801 bytes)
30. [AMPS] AL-80B Amps (score: 1): Author: ITR@Nanoteq.co.za (Ian Roberts); Date: Thu, 28 Sep 2000 08:52:49 +0200; It appears that a number of ZS-types have acquainted themselves with the HT of PAs and survived, despite being blown across the room. This seems to be the ultimate safety interlock. Reliance on inter; /archives//html/Amps/2000-09/msg01133.html (11,073 bytes)
31. [AMPS] SB1000 parasite question for Tom and Rich+ (score: 1): Author: ITR@Nanoteq.co.za (Ian Roberts); Date: Fri, 04 Aug 2000 10:13:25 +0200; Sound practice! 1. Use power device with lowest transfer frequency to achieve the power required. 2. Pay utmost attention to isolating the input from the output. 3. Pay utmost attention to RF bypass; /archives//html/Amps/2000-08/msg00076.html (9,576 bytes)
32. [AMPS] SB1000 parasite question for Tom and Rich+ (score: 1): Author: ITR@Nanoteq.co.za (Ian Roberts); Date: Mon, 07 Aug 2000 09:04:17 +0200; I distinctly remember in the film "Asteriod", that the approaching objects made a roaring, wishing sound in the vacuum of space. Ian (no other ID offered). -- FAQ on WWW: http://www.contesting.com/F; /archives//html/Amps/2000-08/msg00143.html (9,634 bytes)
33. SV: [AMPS] SB1000 parasite question for Tom and Rich+ (score: 1): Author: ITR@Nanoteq.co.za (Ian Roberts); Date: Thu, 10 Aug 2000 10:46:53 +0200; Gentleman, could Han's problem not be a huge SWR on the output of the tube, unrelated to anything more exotic? Ian ZS6BTE -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contestin; /archives//html/Amps/2000-08/msg00189.html (10,488 bytes)
34. [AMPS] Off course query (score: 1): Author: ITR@Nanoteq.co.za (Ian Roberts); Date: Mon, 28 Aug 2000 12:42:18 +0200; Anyone know how to reverse the direction of a low power, single phase 220 V AC motor? Thanks, Ian ZS6BTE -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrat; /archives//html/Amps/2000-08/msg00433.html (7,897 bytes)
35. SV: [AMPS] Commander 2500E (score: 1): Author: itr@nanoteq.co.za (Ian Roberts); Date: Thu, 15 Jun 2000 07:32:53 +0200; 1500 Sweden lineares legal ). Laws are made to be broken.... On the DXCC thing, a fellow ZS6 has 160 blank QSL cards (160 countries), so much for that scam..... Ciao. -- FAQ on WWW: http://www.contes; /archives//html/Amps/2000-06/msg00192.html (8,350 bytes)
36. [AMPS] CB and other QRO (score: 1): Author: itr@nanoteq.co.za (Ian Roberts); Date: Wed, 21 Jun 2000 14:46:41 +0200; Amusing postings to this reflector on the subject. Judging from reports in QST, etc., the chances of someone being apprehended for running even Megawatts is just about zero, provided they don't broad; /archives//html/Amps/2000-06/msg00289.html (6,845 bytes)
37. [AMPS] Coil heating (score: 1): Author: itr@nanoteq.co.za (Ian Roberts); Date: Mon, 26 Jun 2000 08:30:42 +0200; Steve, the answer IS obvious (hope my shaky maths is correct here): The area of the 6 mm tube is 28.28 sq. mm. The area of the 6x1 mm wire is 4.7 sq. mm.... Around 8 sq. mm of good copper tube sounds; /archives//html/Amps/2000-06/msg00395.html (9,994 bytes)
38. [AMPS] conductive epoxy or similar (score: 1): Author: itr@nanoteq.co.za (Ian Roberts); Date: Thu, 06 Apr 2000 09:08:26 +0200; Electrically conductive epoxies (containing silver compounds) are available ("hot mixes"). They can be used up to SHF (low loss tangets) and are typically used to seal cavities, join adjacent circuit; /archives//html/Amps/2000-04/msg00032.html (7,413 bytes)
39. [AMPS] FAILURE OF PARASITIC RESISTORS IN AL-811X AMPLIFIER (score: 1): Author: itr@nanoteq.co.za (Ian Roberts); Date: Wed, 01 Mar 2000 08:27:10 +0200; Jon, you stated previously that you were in the resistor business. Why don't you provide a mini lecture on the inductance in helical wound "metal film" resistors of the type that are probably going t; /archives//html/Amps/2000-03/msg00000.html (11,686 bytes)
40. [AMPS] Network analysis of suppressors (score: 1): Author: itr@nanoteq.co.za (Ian Roberts); Date: Thu, 02 Mar 2000 11:01:44 +0200; Tom, please explain in your view, why tube type amplifiers are fitted with suppressors. And when amps with 3-500z's (for example) go band, why do they go bang? Ian, ZS6BTE -- FAQ on WWW: http://www.c; /archives//html/Amps/2000-03/msg00030.html (8,940 bytes)

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