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281. [Amps] Help! Ameritron AL-82 (score: 1)
Author: Alfredo Velez WP3C via Amps <amps@contesting.com>
Date: Thu, 20 Oct 2016 20:42:12 -0400
Hi Everyone My Ameritron AL-82 not giving power and it gives me SWR in radio. Any suggestions what could have happened? Alfredo Velez WP3C/NP4DX e-mail: mailto:wp3c@aol.com Web: http://wp3c73.wixsite
/archives//html/Amps/2016-10/msg00108.html (7,210 bytes)

282. Re: [Amps] SB-220 Harbach meter board - blown meter diodes (score: 1)
Author: Bryan Swadener via Amps <amps@contesting.com>
Date: Tue, 25 Oct 2016 04:01:41 +0000 (UTC)
Hi Cathy, D5 & D6 did their job. Replace them, check that R3 isn't open, and verify you don't have a gassy tube(s). 3-500Zs produced after 1985 by Eimac are noted for having poor wire-glass seals (se
/archives//html/Amps/2016-10/msg00112.html (8,847 bytes)

283. Re: [Amps] Titan 425 will not turn on (score: 1)
Author: "Joe Giacobello, K2XX via Amps" <amps@contesting.com>
Date: Tue, 25 Oct 2016 14:49:22 -0400
I've sold my Titans, but besides the HV cable you need the low voltage cable between the P/S and RF deck. IIRC, the power switching is done through that cable. (Make sure the green dot faces up when
/archives//html/Amps/2016-10/msg00117.html (10,195 bytes)

284. Re: [Amps] Chimney for GS35B (score: 1)
Author: Gerald Williamson via Amps <amps@contesting.com>
Date: Fri, 28 Oct 2016 17:16:19 -0400
Mike, chimneys can be homebrewed with Teflon sheet and small screws to form a cylinder. Works well at 432 MHz so it will work at HF as well. 73, Gerald K5GW In a message dated 10/28/2016 1:45:26 P.M.
/archives//html/Amps/2016-10/msg00136.html (7,726 bytes)

285. [Amps] Eimac Y-400 (score: 1)
Author: Jeff Pederson via Amps <amps@contesting.com>
Date: Sat, 29 Oct 2016 17:11:02 +0000 (UTC)
Its been some time since I posted hear or asked any questions. I cant find any tube data for a Eimac Y-400, I tried searching google but didnt come up with anything, does anyone have a datasheet for
/archives//html/Amps/2016-10/msg00145.html (7,173 bytes)

286. Re: [Amps] Eimac Y-400 (score: 1)
Author: Daniel Raney via Amps <amps@contesting.com>
Date: Mon, 31 Oct 2016 19:02:49 -0400
Hi Jeffrey, I haven't found a data sheet for the Y-400 but, a quick search ( on this forum) found where a gentleman talks about this as being the best version of a 4CX250R / 7580W. USAF spec tube. 30
/archives//html/Amps/2016-11/msg00007.html (8,229 bytes)

287. Re: [Amps] SB-220 HV meter on zero (score: 1)
Author: mike via Amps <amps@contesting.com>
Date: Tue, 1 Nov 2016 18:26:15 -0400
You can test the meter with a ohm meter. Disconnect one side and check for continuity. Mike OK, found schematics (thanks Bob W1ICW). Looking at the glorified voltage divider, I'm guessing it's just a
/archives//html/Amps/2016-11/msg00011.html (8,140 bytes)

288. [Amps] Fw: looking for a pair of 3cx800 new eimac tubes (score: 1)
Author: Douglas Johnson via Amps <amps@contesting.com>
Date: Sat, 5 Nov 2016 14:24:27 +0000 (UTC)
My ham friend kz9dx is looking for a pair of new or like new ? eimac 3cx800 tubes, he's had bad luck with the chinese tubes. any around , let me know....thanks, Doug,w9iix ___________________________
/archives//html/Amps/2016-11/msg00029.html (7,349 bytes)

289. [Amps] General coverage HF amplifier (score: 1)
Author: Dale Yu via Amps <amps@contesting.com>
Date: Wed, 16 Nov 2016 17:36:49 +0800
Guys, I'm looking for a 500W or 1KW General coverage (3-30Mhz) HF amplifier,which could be operated outside ham bands as well.Anyone knows about it?Much appreciated! regards,Dale ____________________
/archives//html/Amps/2016-11/msg00052.html (7,251 bytes)

290. [Amps] 1/4" to 1/4" shaft couplers (score: 1)
Author: gudguyham--- via Amps <amps@contesting.com>
Date: Fri, 18 Nov 2016 17:26:31 -0500
I am looking for a number of these couplers. Do not need anything fancy, can be plastic or metal. As I recall someone on here sold me a lot of 50 a few years ago. If anyone has any they would like to
/archives//html/Amps/2016-11/msg00056.html (7,424 bytes)

291. Re: [Amps] 1/4" to 1/4" shaft couplers (score: 1)
Author: Jeff Pederson via Amps <amps@contesting.com>
Date: Wed, 23 Nov 2016 16:10:17 +0000 (UTC)
If allowed here is a link to all kinds of couplers and adapters. I have ordered from him, he is also a fellow Ham. Check out the store. http://www.ebay.com/itm/262730715070?_trksid=p2060353.m2749.l26
/archives//html/Amps/2016-11/msg00107.html (9,802 bytes)

292. [Amps] 3D Printed ABS Plastic for Chimneys? (score: 1)
Author: Dieter Kedrowitsch via Amps <amps@contesting.com>
Date: Wed, 23 Nov 2016 19:19:42 +0000 (UTC)
Having been bit by the home-brew 3D printing bug I've been considering designing and printing my own cooling chimney for a GS-35B HF linear amplifier I built a few years ago.  Currently the chimney i
/archives//html/Amps/2016-11/msg00108.html (8,031 bytes)

293. Re: [Amps] 3D Printed ABS Plastic for Chimneys? (score: 1)
Author: Dieter Kedrowitsch via Amps <amps@contesting.com>
Date: Wed, 23 Nov 2016 20:25:41 +0000 (UTC)
Heat is a very good point I completely failed to consider.  While the tube never seems to get very warm, I don't normally operate more than 600 watts or so.  It would seem silly to use a chimney mate
/archives//html/Amps/2016-11/msg00111.html (8,814 bytes)

294. Re: [Amps] TL-922(A) Recent Acquisition (score: 1)
Author: Bryan Swadener via Amps <amps@contesting.com>
Date: Sun, 27 Nov 2016 06:38:14 +0000 (UTC)
Vacuum/reed relays are the way to go. The W7RY QSK relay driver board provides all the support needed. Jim sells the bare TL922(A) board for $18: http://www.ebay.com/itm/282199995256. He offers the r
/archives//html/Amps/2016-11/msg00143.html (9,629 bytes)

295. [Amps] Fwd: 8877 Grid Connection DC or Not (score: 1)
Author: gudguyham--- via Amps <amps@contesting.com>
Date: Tue, 29 Nov 2016 06:37:46 -0500
Sent from AOL Mobile Mail <div id="AOLMsgPart_2_31e53d49-b8f3-4ab6-a1cf-7e9619dd0eba"> <div class="aolReplacedBody">Jim, I use the same scheme as the Ameritron AL-1500. Easy and very effective. Schem
/archives//html/Amps/2016-11/msg00157.html (9,321 bytes)

296. Re: [Amps] 8877 Grid Connection DC or Not (score: 1)
Author: Radio WC6W via Amps <amps@contesting.com>
Date: Tue, 29 Nov 2016 17:35:54 +0000 (UTC)
Hi Jim, Why not leave the grid grounded but, just measure the cathode and plate currents then subtract to calculate the grid current? 73 & Good morning, Marv WC6W http://qsl.net/wc6w/ Subject: [Amps]
/archives//html/Amps/2016-11/msg00160.html (8,340 bytes)

297. Re: [Amps] Amps Digest, Vol 167, Issue 38 (score: 1)
Author: Gary Smith via Amps <amps@contesting.com>
Date: Tue, 29 Nov 2016 13:35:15 -0800
Fwiw, I have noted the higher frequency I run my Ameritron AL-82 (roughly same amp as a SB-220) the dull red in the 3-500's turn towards white. Gary...wa6fgi To subscribe or unsubscribe via the World
/archives//html/Amps/2016-11/msg00162.html (11,335 bytes)

298. [Amps] SPE 2K - noisy exhaust fans (score: 1)
Author: Dick via Amps <amps@contesting.com>
Date: Tue, 29 Nov 2016 23:43:33 -0500
As mentioned, the SPE 2K is a very nice amp in many ways, but my problem with them is the fans are very noisy. They use small 2" exhaust fans that run at warp speed and it sounds like a jet engines i
/archives//html/Amps/2016-11/msg00174.html (15,497 bytes)

299. Re: [Amps] Amps Digest, Vol 167, Issue 38 (score: 1)
Author: Gary Smith via Amps <amps@contesting.com>
Date: Wed, 30 Nov 2016 09:31:50 -0800
Umm...warm and comfortable, but not smokin'. Maybe the lower edge of the plates go from red towards white. I run the amp at spec, but I don't beat the pants off of it. 1.5k+- a few Po on my Wavenode
/archives//html/Amps/2016-11/msg00188.html (8,880 bytes)

300. Re: [Amps] 8877 Grid Connection DC or Not (score: 1)
Author: Radio WC6W via Amps <amps@contesting.com>
Date: Wed, 30 Nov 2016 17:34:40 +0000 (UTC)
Hi Jim, Ah... the unknown factor. You could include an (optically?) isolated plate current sensor and then do the math and metering at low voltage. 73 & Good morning, Marv WC6W http://qsl.net/wc6w/ S
/archives//html/Amps/2016-11/msg00189.html (10,591 bytes)

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