Search String: Display: Description: Sort:

Results:

References: [ +from:km1h@jeremy.qozzy.com: 394 ]

Total 394 documents matching your query.

261. Re: [Amps] GI-7b amp (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 8 Nov 2017 17:48:47 -0500
The IMD is in the category of sweep tubes and 4CX250's run hard. Great Class C tubes Carl Hi All, I was looking at "The Everyham's Amplifier" in the latest handbook and it mentions using a pair of GI
/archives//html/Amps/2017-11/msg00081.html (8,568 bytes)

262. Re: [Amps] Pole pigs removed from oil ?? (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Mon, 20 Nov 2017 14:48:55 -0500
I didnt work for RCA Bruce, picked it up at the Deerfield NH hamfest in the 80's. Carl -- Original Message -- From: <w8hw@comcast.net> To: "Carl" <km1h@jeremy.qozzy.com>; "Rob Atkinson" <ranchorobbo@
/archives//html/Amps/2017-11/msg00173.html (11,185 bytes)

263. Re: [Amps] Alpha 9500 Relays Needed (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 23 Nov 2017 10:40:56 -0500
That is past tense http://www.gigavac.com/discontinued-hamamateur-radio-relays-products -- Original Message -- From: "Jim W7RY" <jimw7ry@gmail.com> To: <gudguyham@aol.com>; <bmm57@sbcglobal.net> Cc:
/archives//html/Amps/2017-11/msg00201.html (11,261 bytes)

264. Re: [Amps] 572Bs Needed (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 28 Nov 2017 13:11:10 -0500
All the stepped shoulder brands from the USA are made by Cetron; Dentron Raytheon, GE, etc. All the rounded top style were built by United Electronics (UE) such as Waters. Cetron even made some for U
/archives//html/Amps/2017-11/msg00216.html (6,809 bytes)

265. Re: [Amps] amplifier in 1960's QST (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Mon, 4 Dec 2017 19:52:50 -0500
I vaguely remember the article and the tube load was 50 Ohms so there was no Load control!! WRL or Globe had a something 2000 that was all sweep tubes. Carl I have been looking for an article about a
/archives//html/Amps/2017-12/msg00022.html (8,671 bytes)

266. Re: [Amps] Multi tube amp (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 5 Dec 2017 18:18:04 -0500
That reminds me of around 1957 when I dipped a toe into SSB with a used Central Electronics 10B and a BC-458 VFO.The fleapower was boosted by a article,CQ or QST, that was an amp that used a modified
/archives//html/Amps/2017-12/msg00035.html (27,496 bytes)

267. Re: [Amps] Multi tube amp (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 6 Dec 2017 10:59:15 -0500
Unless you wanted an AC/DC PS industrial Step Up/Down transformers were very cheap in surplus shops. The one here Ive used for all sorts of projects is 110/330 or 220/660 at about 110# with just thin
/archives//html/Amps/2017-12/msg00039.html (9,417 bytes)

268. Re: [Amps] Multi tube amp (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Mon, 11 Dec 2017 09:51:37 -0500
Even if it was possible pushing the INTERNAL parts that hard would radically shorten life. Why not use a variety of oddball filament voltage BIG sweep tubes that are still dirt cheap NIB at hamfests,
/archives//html/Amps/2017-12/msg00077.html (34,999 bytes)

269. Re: [Amps] Henry 2k-4 HV inductor (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 14 Dec 2017 10:47:46 -0500
W8JI experienced serious fireworks doing that A tuned choke is used to enable a smaller choke to be used. A tuned choke filter has much better dynamic regulation than a conventional choke circuit. A
/archives//html/Amps/2017-12/msg00099.html (16,005 bytes)

270. Re: [Amps] Negative feedback passive input tetrode (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Fri, 15 Dec 2017 10:51:38 -0500
I wish I could find a NIB pair of the 4CX600J or preferrably JA at some low cost. Carl I use a 12 ohm resistor in the cathode lead of my 4CX600J 73 Peter I just had a thought. Has anyone see or used
/archives//html/Amps/2017-12/msg00113.html (9,659 bytes)

271. Re: [Amps] NXP 65V LDMOS 1K80H-1800W (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Mon, 25 Dec 2017 11:03:35 -0500
Yep and a sloppy label thrown over a Chinese KT-88 box. Ive used many Chinese 8877's in ham and industrial amps with never a report of a problem which is no surprise as they use Eimac supplied toolin
/archives//html/Amps/2017-12/msg00155.html (14,512 bytes)

272. Re: [Amps] Life of tubes in ham service (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 27 Dec 2017 19:21:46 -0500
I have used a scope to monitor filament voltage on a large number of commercial amps and have yet to see one where the filament transformer or winding does not do an excellent job of limiting inrush.
/archives//html/Amps/2017-12/msg00174.html (13,961 bytes)

273. Re: [Amps] Life of tubes in ham service (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 27 Dec 2017 21:47:35 -0500
That is the year I bought a 64 GTO convertible and still had a 57 Chevy convertible as a beater. In 67 I started a series of 63 Impalas when I sold the GTO as the DP for a house in NH, we came from M
/archives//html/Amps/2017-12/msg00178.html (10,915 bytes)

274. Re: [Amps] Life of tubes in ham service (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 27 Dec 2017 21:54:20 -0500
Those would have been the real Svetlana who started the pink ceramic which RCA copied. They still use it on the GS36B/4CX400A which is a superb tube and Ive converted several NCL-2000's to a pair. I
/archives//html/Amps/2017-12/msg00179.html (16,470 bytes)

275. Re: [Amps] Life of tubes in ham service (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sat, 30 Dec 2017 09:44:52 -0500
There is a version for wrapping headers and other exhaust pipes where clearance is a problem. Carl Silicone rubber sheet wrapped into a cylinder works fine and requires no machining. The ends simply
/archives//html/Amps/2017-12/msg00193.html (12,650 bytes)

276. Re: [Amps] Defining CCS (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 31 Dec 2017 17:01:43 -0500
Every wonder why a broadcast transmitter is in such a large box? 73 Jim W7RY To make it hard for broadcast types like me to bring them home to put on 160. Don W4DNR For the same reason 20' plus long
/archives//html/Amps/2017-12/msg00207.html (9,563 bytes)

277. Re: [Amps] Toroidal filament choke and DC current (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sat, 6 Jan 2018 10:46:30 -0500
Pete, the TL-922 has the 3-500Z filaments in series and the flat ferrite flat bar filament choke is quite small and 22uH. but I have no idea of its ferrite specs. That amp makes full power on 160 wit
/archives//html/Amps/2018-01/msg00055.html (10,004 bytes)

278. Re: [Amps] Need Fan for amp (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 14 Jan 2018 19:57:42 -0500
Ive used the 4600Z as a replacement in several amps and dont find it objectionable but a resistor could be used to slow it down or use a switch for two speeds as I did to my Amp Supply LK-500ZC. Carl
/archives//html/Amps/2018-01/msg00075.html (10,086 bytes)

279. Re: [Amps] Need Fan for amp (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 14 Jan 2018 20:02:30 -0500
The EBM Papst 4600Z is a bolt in replacement, all metal construction and precise German engineering. Ive used several hre and for various customer amps.. Gopher Electronics has had the best price. Ca
/archives//html/Amps/2018-01/msg00076.html (9,655 bytes)

280. Re: [Amps] Attenuation of signal (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 21 Jan 2018 10:10:04 -0500
Usually relay contacts that became gummed up from constant low current use and insufficient wiping action. Open frame can be cleaned The Vacuum relay optin can usually be restored by rewiring and put
/archives//html/Amps/2018-01/msg00122.html (8,700 bytes)

Current List: 261 - 280
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]
This search system is powered by Namazu