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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+Blown\s+TL922A\.\.\.\s+What\s+to\s+do\?\s*$/: 246 ]

Total 246 documents matching your query.

1. [AMPS] Blown TL922A... What to do? (score: 1): Author: 2@vc.net (measures); Date: Thu, 14 Sep 2000 08:31:02 -0700; Eimac's warranty department does not test returns for gold-sputtering. end - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@co; /archives//html/Amps/2000-09/msg00720.html (8,926 bytes)
2. [AMPS] Blown TL922A... What to do? (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Thu, 14 Sep 2000 09:39:29 -0500; Works for me, Tom..I do provide a pot on the front panels to adjust the threshold to whatever necessary. I don't run my 8877's at 3300 volts; I run them @ 3999 volts key down. Less drive required (6; /archives//html/Amps/2000-09/msg00714.html (9,896 bytes)
3. [AMPS] Blown TL922A... What to do? (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 14 Sep 2000 10:17:35 -0400; First, we have to assume Rich is unbiased and telling the truth. Assuming that: 75 mA is not plenty of headroom Phil. At 3300 volts anode, a typical 8877 requires 125 mA of grid current to produce 25; /archives//html/Amps/2000-09/msg00712.html (9,964 bytes)
4. [AMPS] Blown TL922A... What to do? (score: 1): Author: 2@vc.net (measures); Date: Thu, 14 Sep 2000 06:25:53 -0700; The Red Herring. end - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@con; /archives//html/Amps/2000-09/msg00709.html (8,258 bytes)
5. [AMPS] Blown TL922A... What to do? (score: 1): Author: 2@vc.net (measures); Date: Thu, 14 Sep 2000 06:21:46 -0700; ? Some men tell the truth and some men don't. Do you have a mouse in your pocket, Tom? - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissi; /archives//html/Amps/2000-09/msg00705.html (8,436 bytes)
6. [AMPS] Blown TL922A... What to do? (score: 1): Author: 2@vc.net (measures); Date: Thu, 14 Sep 2000 06:21:45 -0700; That works out to be c. 8w dissipation. According to my spec sheet, the grid will safely dissipate 25w. For VHF applications, surely. cheers, Phil - Rich..., 805.386.3734, www.vcnet.com/measures. en; /archives//html/Amps/2000-09/msg00708.html (9,328 bytes)
7. [AMPS] Blown TL922A... What to do? (score: 1): Author: 2@vc.net (measures); Date: Thu, 14 Sep 2000 06:21:44 -0700; I have never seen a VHF amplifier with a suppressor. end - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Admin; /archives//html/Amps/2000-09/msg00707.html (8,565 bytes)
8. [AMPS] Blown TL922A... What to do? (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Thu, 14 Sep 2000 13:03:02 +0100; And they run happily in legal-limit amps right across the VHF spectrum without boiling gold. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http://www.ifwte; /archives//html/Amps/2000-09/msg00704.html (9,573 bytes)
9. [AMPS] Blown TL922A... What to do? (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Thu, 14 Sep 2000 05:57:15 -0500; I use Carborendum Type C Globar resistors as Rsupp on all my amps >4-1000A and larger. I got the idea from Eimac...they used these in their line of RF generators for years. Since they clip in, they; /archives//html/Amps/2000-09/msg00702.html (9,072 bytes)
10. [AMPS] Blown TL922A... What to do? (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Thu, 14 Sep 2000 05:47:29 -0500; Alas, the grid-trip circuit in the AL-1500 limits at a whopping 175ma Ig, and is not adjustable. At 2250 watts output, an 8877 draws less than 65 ma grid current. 75 ma limiting is plenty of headroo; /archives//html/Amps/2000-09/msg00701.html (9,949 bytes)
11. [AMPS] Blown TL922A... What to do? (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 14 Sep 2000 05:57:52 -0400; Hi Rich, If you can't tell the truth about Denny Had and other things, like the letter I supposedly wrote to you, how can we trust you with something like this? 73, Tom W8JI w8ji@contesting.com -- FA; /archives//html/Amps/2000-09/msg00700.html (9,333 bytes)
12. [AMPS] Blown TL922A... What to do? (score: 1): Author: 2@vc.net (measures); Date: Thu, 14 Sep 2000 00:03:56 -0700; To: <amps@contesting.com> I don't see why not, Steve. Increase L-supp in a copper-wire suppressor and Rp decreases. This lowers VHF amplification. The fly in the ointment is increased dissipation in; /archives//html/Amps/2000-09/msg00699.html (10,128 bytes)
13. [AMPS] Blown TL922A... What to do? (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Thu, 14 Sep 2000 07:32:18 +0100; --Original Message-- From: Mike Sawyer <kc4slk@csrlink.net> To: Phil Clements <philk5pc@tyler.net>; amps@contesting.com <amps@contesting.com>; Bill Aycock <baycock@hiwaay.net> Cc: 2@vc.net <2@vc.net>; /archives//html/Amps/2000-09/msg00698.html (9,713 bytes)
14. [AMPS] Blown TL922A... What to do? (score: 1): Author: 2@vc.net (measures); Date: Wed, 13 Sep 2000 22:07:46 -0700; I understand that the AL-1500 has a grid-trip circuit. The 8877 (s/n HSZ501)I tested this morning had gold-sputtering. It was removed from an AL-1500. Only c. 5W? Ever ran an 8877 with no suppressor; /archives//html/Amps/2000-09/msg00695.html (10,670 bytes)
15. [AMPS] Blown TL922A... What to do? (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Wed, 13 Sep 2000 23:42:28 -0500; All my 8877 amps have a grid-trip circuit similar to those found in the ARRL Handbooks and Bill Orr's Handbooks. The voltage drop across the grid meter shunt is sampled through a 10k ohm pot that dr; /archives//html/Amps/2000-09/msg00693.html (10,141 bytes)
16. [AMPS] Blown TL922A... What to do? (score: 1): Author: 2@vc.net (measures); Date: Wed, 13 Sep 2000 20:13:00 -0700; yea verily, Mike - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contest; /archives//html/Amps/2000-09/msg00680.html (9,625 bytes)
17. [AMPS] Blown TL922A... What to do? (score: 1): Author: dhb@mediaone.net (Dave, AA6YQ); Date: Wed, 13 Sep 2000 21:18:21 -0400; There is no way for either of us to know how many people agree that "parasitics are the root of all evil" -- whatever that means. But a quick scan of this reflector's archives will remind you that t; /archives//html/Amps/2000-09/msg00673.html (14,970 bytes)
18. [AMPS] Blown TL922A... What to do? (score: 1): Author: kc4slk@csrlink.net (Mike Sawyer); Date: Wed, 13 Sep 2000 20:30:40 -0400; <snip> Wilson reportedly rules the roost. I thought it was the work of K1ZZ? Mike(y) W3SLK -- Original Message -- From: measures <2@vc.net> To: AMPS <amps@contesting.com> Sent: Wednesday, September 1; /archives//html/Amps/2000-09/msg00669.html (10,635 bytes)
19. [AMPS] Blown TL922A... What to do? (score: 1): Author: kc4slk@csrlink.net (Mike Sawyer); Date: Wed, 13 Sep 2000 20:28:17 -0400; snip: Jerry Sevick is another great thinker/writer that the league seems to have turned their back on. "Aint that the truth!!!" Mike(y) W3SLK -- Original Message -- From: Phil (VA3UX) <phil@vaxxine.c; /archives//html/Amps/2000-09/msg00668.html (14,330 bytes)
20. [AMPS] Blown TL922A... What to do? (score: 1): Author: kc4slk@csrlink.net (Mike Sawyer); Date: Wed, 13 Sep 2000 20:25:32 -0400; They lost my membership as a result of this and their "dumbing down" of the license. Mike(y) W3SLK -- Original Message -- From: michael watts <wy6k@yahoo.com> To: Jim Reid <kh7m@hsa-kauai.net>; Paul; /archives//html/Amps/2000-09/msg00667.html (15,409 bytes)

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