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

Total 394 documents matching your query.

381. Re: [Amps] 572B/T160L tube class C (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 19 Aug 2021 21:50:36 -0400
That tube was designed for AM BCB service by Taylor but didnt catch on there or for AM hams as the T-160L in the late 50's. It was later bought by and designated the 572/T-160L for Unitrd Electronics
/archives//html/Amps/2021-08/msg00042.html (9,323 bytes)

382. Re: [Amps] 572B/T160L tube class C (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Fri, 20 Aug 2021 10:57:14 -0400
Those spec sheets have been around for decades BUT: Has anyone ever seen an O'Malley? The Svetlana was not a true 572B clone, the anode was smaller and the plate dissipation lower. It did not work we
/archives//html/Amps/2021-08/msg00045.html (9,600 bytes)

383. Re: [Amps] 572B/T160L tube class C (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Fri, 20 Aug 2021 19:52:20 -0400
The Chinesw 572B and 811 (it is NOT a real 811A, not even close) are mostly all junk looking for a trash can. They sometimes let a good one sneak thru. Best bet is to pay the freight for a real NOS C
/archives//html/Amps/2021-08/msg00046.html (12,803 bytes)

384. Re: [Amps] 572B/T160L tube class C (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sat, 21 Aug 2021 12:43:29 -0400
Interesting Alek and thanks for the input. Have you come up with a specific resistance for the various 572B amps rhat would make it easier for others? Around here the 120/240V lines can vary from abo
/archives//html/Amps/2021-08/msg00051.html (17,758 bytes)

385. Re: [Amps] 572B/T160L tube class C (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sat, 21 Aug 2021 12:59:53 -0400
Rob, I lived in Roselle a good part of the 70's and the locals took me along with them on a tour. Blems were even cheaper and the Hunter 2000B was a very popular amp in the area. Myself and NCL-2000
/archives//html/Amps/2021-08/msg00052.html (9,251 bytes)

386. Re: [Amps] 572B/T160L tube class C (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sat, 21 Aug 2021 23:07:50 -0400
Thats as bad as some current US based idiots claiming the Shuguang 811"A" is equal to the old RCA version Carl -- I was not sure about this one since it states a plate dissipation of 220 Watts. That
/archives//html/Amps/2021-08/msg00059.html (11,349 bytes)

387. Re: [Amps] Testing Tubes with a Henry 2K (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 22 Aug 2021 10:52:28 -0400
He may be thinking of the Kenwood TL-922 Carl -- Original Message -- Well... My 2K (original) is wired in parallel. It is also designed for 3-400's and won't accept a 3-500 unless you change the chim
/archives//html/Amps/2021-08/msg00063.html (10,424 bytes)

388. Re: [Amps] Testing Tubes with a Henry 2K (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 22 Aug 2021 12:41:40 -0400
How about removing one plate cap? Every 2x 3-500 amp Ive tried has enough tank circuit tuning range to use on 40 and 20 and dont worry about the Q. Just remember to reduce drive power. Carl Carl, et
/archives//html/Amps/2021-08/msg00067.html (9,674 bytes)

389. Re: [Amps] Amps Digest, Vol 224, Issue 12 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 22 Aug 2021 12:50:45 -0400
It sounds like a good time to find an alternative location for the resistor, being hams function trumps beauty. Carl Paul, This is not an easy job. It may take 2 to 3 hours. You need to remove the AC
/archives//html/Amps/2021-08/msg00068.html (10,429 bytes)

390. Re: [Amps] Testing Tubes with a Henry 2K (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Mon, 23 Aug 2021 12:50:23 -0400
As amp/vintage TX repair is a part time business here since the 60's Ive tested a single tube in a two and three tube amp from a 807's to 8877's. Metal or glass, triode, tetrode, and pentode, they al
/archives//html/Amps/2021-08/msg00075.html (10,974 bytes)

391. Re: [Amps] MLA-2500 Tube Conversion (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 10 Oct 2021 15:22:22 -0400
The only good test for that is to hook up and measure with a load and a True RMS meter. There are still many new production 115/230V transformers being sold altho they test fine on 120/240 + circuits
/archives//html/Amps/2021-10/msg00012.html (9,501 bytes)

392. Re: [Amps] Hole punches (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 10 Oct 2021 15:46:43 -0400
I often use a step bit to enlarge holes in aluminum and steel. Lubricate and dont overspeed. Carl I recently had a transmitter that had holes cut for some capacitors. I needed larger holes. But a hol
/archives//html/Amps/2021-10/msg00013.html (7,747 bytes)

393. Re: [Amps] MLA-2500 Tube Conversion (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 10 Oct 2021 21:17:33 -0400
The GI-7B is fine if all you care about is CHEEEEEP. It also is a horrible tube for a linear and would sound great on 11M I converted an MLA2500 to a single 3CX800A7 some years ago, and it works fine
/archives//html/Amps/2021-10/msg00019.html (9,156 bytes)

394. Re: [Amps] 1:9 un-un for grid driven tetrode (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Mon, 25 Oct 2021 12:20:56 -0400
The National NCL-2000, ca 1964-70 used a pair of 8122 tetrodes with an untuned resistive input. The bias was AB1 on SSB and AB2 on CW where grid current was used. Carl That 1:9 unun and 450 ohm resis
/archives//html/Amps/2021-10/msg00091.html (11,336 bytes)

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