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

Total 394 documents matching your query.

321. Re: [Amps] QRO 2500DX MARK lll 4CX800 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 31 Mar 2019 12:15:58 -0400
No more robust than any other wimpy tube with a 2W G1 and a 15W G2 rating and very easy to destroy. Since the actual rated PD is 600W the later 800W rating is a pure fraud by Svetlana USA that leads
/archives//html/Amps/2019-04/msg00003.html (10,365 bytes)

322. Re: [Amps] QRO 2500DX MARK lll 4CX800 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Mon, 1 Apr 2019 11:08:19 -0400
Leigh, Since your Australian power limit is 400W, and I would "assume" you always obey that, then emission life willl be extended. I am still running the original 1986 Eimac 3-500Z's in my LK-500ZC a
/archives//html/Amps/2019-04/msg00005.html (13,407 bytes)

323. Re: [Amps] QRO 2500DX MARK lll 4CX800 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Mon, 1 Apr 2019 22:05:23 -0400
I guess you didnt bother reading and understandng my post relating to the "4CX800A" It never was and will never be an Eimac product. They are a fraud by several US hams including a former Eimac engin
/archives//html/Amps/2019-04/msg00010.html (10,148 bytes)

324. Re: [Amps] QRO 2500DX MARK lll 4CX800 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 2 Apr 2019 20:56:59 -0400
Can you supply the date codes to backup that statement? My sources state they are just a later batch released from surplus and the DXE reviews are mixed....only 3 reviews going back a year or more do
/archives//html/Amps/2019-04/msg00015.html (11,858 bytes)

325. Re: [Amps] QRO 2500DX MARK lll 4CX800 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 4 Apr 2019 20:32:11 -0400
Turn down WHAT a notch? I ask a simple question to clarify the provenance of the tubes and you get your knickers in a knot! Why? I believe the forum deserves to obtain as much actual data as possible
/archives//html/Amps/2019-04/msg00025.html (14,449 bytes)

326. Re: [Amps] disc ceramic capitors (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Fri, 19 Apr 2019 11:03:59 -0400
I dont know what is available these days....and reliable....from distributors. But, check with MFJ as they use MANY in their 1500W auto tuner along with a nice photo in their catalog. Carl What param
/archives//html/Amps/2019-04/msg00044.html (8,277 bytes)

327. Re: [Amps] 3-500Z replacement sockets for TL922 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sat, 20 Apr 2019 11:05:54 -0400
Those are a standard Johnson socket going back to the late 40's for the 4-250A family. Those and Chinese versions are all over Fleabay.. Carl Any FIRST HAND ( not a " friend of mine bought" or "I hav
/archives//html/Amps/2019-04/msg00049.html (9,051 bytes)

328. Re: [Amps] Why 2 3CX800s instead of one 8877? (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sat, 20 Apr 2019 11:08:45 -0400
Reseat the tubes several times and be sure the anode contact hasnt come apart.....a common failure. Carl I have been using a 76A for many years along with several other amps. I decided I had more amp
/archives//html/Amps/2019-04/msg00050.html (10,270 bytes)

329. Re: [Amps] Why 2 3CX800s instead of one 8877? (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 23 Apr 2019 11:12:27 -0400
That is more than enough voltage to reach the then legal limit of 2000W PEP INPUT. That is also similar to the voltage and power of the Dentron DTR-2000L. The limiting factor is the transformer and n
/archives//html/Amps/2019-04/msg00055.html (11,265 bytes)

330. Re: [Amps] Why 2 3CX800s instead of one 8877? (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 25 Apr 2019 17:40:50 -0400
Since a pair of 3CX800's wont even come close to running hard in a 2 or 3 hole 76A series amp then a little careful surgery will do the trick. Remove enough of the anode cooler from both tubes so tha
/archives//html/Amps/2019-04/msg00057.html (10,855 bytes)

331. Re: [Amps] RG-213 Hi pot ? (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 12 May 2019 18:02:18 -0400
Just dont use old coax. Ive personally seen 6KV used in an industrial app and have heard of it run at 9KV. The 5KV Mil Spec is just that....built to a spec but with sufficient overhead which is the n
/archives//html/Amps/2019-05/msg00039.html (8,489 bytes)

332. Re: [Amps] Fwd: Re: Removing grid shorts (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 5 Jun 2019 18:34:59 -0400
You give up after one try? Carl -- Original Message -- From: "Alek Petkovic" <vk6apk@bigpond.com> To: "Boye Christensen" <oz7c@cool.dk> Cc: <amps@contesting.com> Sent: Tuesday, June 04, 2019 7:47 PM
/archives//html/Amps/2019-06/msg00020.html (14,654 bytes)

333. Re: [Amps] Fwd: Re: Removing grid shorts (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 12 Jun 2019 10:24:20 -0400
Nothing ventured nothing gained. Go for it Carl -- Original Message -- From: "Alek Petkovic" <vk6apk@bigpond.com> To: "Carl" <km1h@jeremy.qozzy.com> Cc: <amps@contesting.com> Sent: Tuesday, June 11,
/archives//html/Amps/2019-06/msg00037.html (16,685 bytes)

334. Re: [Amps] 3cx800a7 chimeny (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Mon, 17 Jun 2019 15:25:01 -0400
Make one from that red sheet rubber sold at Granger, etc. Tube heat and RF doesnt faze it Staple it once formed. Ive used it on 8877s' for decades. Carl Looking for a chimney for a 3CX800A7 tube...RF
/archives//html/Amps/2019-06/msg00048.html (8,160 bytes)

335. Re: [Amps] 3cx800a7 chimeny (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 27 Jun 2019 14:08:02 -0400
Thats the stuff Harald. Carl Is it this one you recommend Carl ? https://www.grainger.com/search?searchBar=true&searchQuery=red+rubber+sheet 73 Harald, LB2HG / AA4NX LIFE IS TOO SHORT FOR QRP My regi
/archives//html/Amps/2019-06/msg00067.html (10,055 bytes)

336. Re: [Amps] Need some amplifier advice (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 27 Jun 2019 16:18:18 -0400
Find an old Johnson Thunderbolt, they are almost free these days. Carl Hi All, I am looking either for plans for an 80 meter mono-band amplifier optimized for the RTTY portion of the band or an actua
/archives//html/Amps/2019-06/msg00068.html (9,479 bytes)

337. Re: [Amps] Need some amplifier advice (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 27 Jun 2019 14:22:40 -0400
Why not just try to deal with his request or otherwise stifle the urge to reply. Id suggest 3B28's in placeof 866A's however, a direct swap. Carl <Hi All, <I am looking either for plans for an 80 met
/archives//html/Amps/2019-06/msg00070.html (10,139 bytes)

338. Re: [Amps] Need some amplifier advice (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Fri, 28 Jun 2019 10:59:11 -0400
<Id suggest 3B28's in placeof 866A's however, a direct swap. <Carl them last ? Forever for 3B28's has been my experience so far and they are readily available nor do they flash over like 866A's. I o
/archives//html/Amps/2019-06/msg00071.html (9,529 bytes)

339. Re: [Amps] Modern rig amplifier keying (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 21 Jul 2019 15:10:12 -0400
A few earliy Icoms couldnt unless it was current limiited, their switching transistor was a wimp. Carl Having 12-volts on the keying circuit (actually, usually, 13.8-volts) is very common and I don't
/archives//html/Amps/2019-07/msg00023.html (9,298 bytes)

340. Re: [Amps] HV Fuse (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Fri, 20 Sep 2019 17:49:53 -0400
Time to make your own from an open one or start from scratch.. Carl I have an old Henry that has a Bussman HVB fuse. The larger HVJ is rated for 5KV. They are sand filled cardboard, not ceramic. Avai
/archives//html/Amps/2019-09/msg00050.html (10,638 bytes)

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