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Total 218 documents matching your query.

21. Re: [Amps] Amp faceplates (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Sun, 19 Mar 2006 08:40:04 -0800
Most modern sign shops can make nearly any design you might need for that project and the results are very pro looking.Call around and ask. The Brother laser label makers with clear tape look nice to
/archives//html/Amps/2006-03/msg00543.html (9,068 bytes)

22. Re: [Amps] Tuned input board on SB-220 (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Wed, 22 Mar 2006 23:09:38 -0800
The LDG module works FB with my YC-156 AMP...Output waveform looks much better than with untuned input,however it might taks a shoehorn to fit inside the Heath amps or at least some re-positioning of
/archives//html/Amps/2006-03/msg00610.html (11,425 bytes)

23. Re: [Amps] Tuned input board on SB-220 (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Fri, 24 Mar 2006 10:46:42 -0800
But if you employ the tuner in the driver, the length of coax to the tube cathode becomes another issue. I am confident the engineers at LDG as well as those who tested their tuner boards in amps pri
/archives//html/Amps/2006-03/msg00642.html (15,216 bytes)

24. Re: [Amps] Rivet nuts (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Thu, 6 Apr 2006 22:13:59 -0700
This type of fastener is availiable in many sizes in both metric and standard threads. The automotive industry uses this type of fastener and simple installation tools are availiable thru many automo
/archives//html/Amps/2006-04/msg00097.html (9,001 bytes)

25. Re: [Amps] NON-CONTACT laser thermometer (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Tue, 11 Apr 2006 14:44:48 -0700
The better units sold under the Snap-On name used technology that auto focused at a distance of between 8 inches and 2 feet.The point was no more than a half inch in diameter.The price was several ti
/archives//html/Amps/2006-04/msg00185.html (9,687 bytes)

26. Re: [Amps] Sources of CPVC for GS35b Chimney (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Thu, 13 Apr 2006 20:42:02 -0700
Tony, your point is well taken and the explanation on your site is very probable. I usually space PA tubes at least three inches from walls in my amplifiers so this is probably why I have never had p
/archives//html/Amps/2006-04/msg00241.html (10,567 bytes)

27. [Amps] RCA 8807 Tetrode (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Mon, 15 May 2006 18:12:46 -0700
Would anyone have specs for a RCA 8807 tetrode power grid tube? Thanks..Jim.. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman
/archives//html/Amps/2006-05/msg00106.html (6,050 bytes)

28. Re: [Amps] Henry 8K (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Tue, 16 May 2006 14:55:29 -0700
What`s REAL NICE is to have REAL BIG antennas and REAL BIG amplifiers(Used with common sense) and be REAL FAR away from neighbors...Used to be like that here until the breakdown of our Border Patrol.
/archives//html/Amps/2006-05/msg00148.html (11,433 bytes)

29. Re: [Amps] RE : who needs it? Henry 8K (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Wed, 24 May 2006 07:02:33 -0700
And several "Contesters" sound like fallout too...Also couldn`t resist...Jim K7RDX.... -- Original Message -- From: <Gudguyham@aol.com> To: <shr@swtexas.net>; <amps@contesting.com> Sent: Wednesday, M
/archives//html/Amps/2006-05/msg00319.html (8,227 bytes)

30. Re: [Amps] high frequency filament excitation TSPA (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Thu, 13 Jul 2006 17:12:30 -0700
For what it`s worth,I had a filament hum/ac modulation problem several years ago after constructing a GS-35b using conventional center tap negative.I cured the problem using a seperate choke to the c
/archives//html/Amps/2006-07/msg00376.html (10,033 bytes)

31. Re: [Amps] output of SB220 typical TSPA (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Mon, 17 Jul 2006 14:26:11 -0700
Joe,what was the filament voltage with that kind of line input? Excessive filament voltage allows more than normal emission with thoriated tungsten fils...At least for a while! 73, Jim K7RDX.. -- Ori
/archives//html/Amps/2006-07/msg00543.html (10,136 bytes)

32. Re: [Amps] output of SB220 typical TSPA (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Mon, 17 Jul 2006 18:30:21 -0700
Agreed Tom...My question was why would someone run an amp with that value of line voltage if he knew the effect it would have on the fils.I do know for a fact that a lot of the Chinese 3-500z tubes h
/archives//html/Amps/2006-07/msg00552.html (9,835 bytes)

33. Re: [Amps] Life and gain of 3-500Z (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Tue, 18 Jul 2006 07:09:15 -0700
The tubes (3-500z`s) were from RF Parts. I replaced (Henry 3K repair job)some low hr Eimacs that one had developed a grid to filament short. Gain was compared to a nos pair of Eimac`s.Higher zsac for
/archives//html/Amps/2006-07/msg00569.html (11,297 bytes)

34. Re: [Amps] Life and gain of 3-500Z (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Tue, 18 Jul 2006 14:00:37 -0700
If your theory is correct concerning tube gain (Mu) how do you explain this: A gs-35b requires around 40 volts bias for zsac of 150ma with 4kv Ep...A 8877 at the same Ep requires much less for simila
/archives//html/Amps/2006-07/msg00595.html (10,755 bytes)

35. [Amps] 4pr400A for sale (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Tue, 1 Aug 2006 20:39:00 -0700
NOS 4PR400A National Electronics graphite anode tube never been used for sale..$65.00 shipped Cont USA..Pse reply personal email or 509-884-9307...Jim K7RDX.. ________________________________________
/archives//html/Amps/2006-08/msg00028.html (6,403 bytes)

36. Re: [Amps] Tuned Input - IMD and efficiency (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Tue, 8 Aug 2006 17:08:34 -0700
Phil&Group...That`s a very effective solution for the big tubes when running 5+kv, adding a supressor to the cathode side tamed my pair of 4x1`s running 6700v. I seem to remember posting this some ti
/archives//html/Amps/2006-08/msg00309.html (11,015 bytes)

37. Re: [Amps] Anodizing aluminum, painting etc. (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Thu, 17 Aug 2006 07:33:45 -0700
Most if not all of the older automotive radiators (Pre 1970`s) were made from brass and painted black mainly for looks and corrosion protection..Nearly all modern radiators are made of aluminum and f
/archives//html/Amps/2006-08/msg00526.html (9,529 bytes)

38. Re: [Amps] Parasitics & Filament Sag (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Sun, 27 Aug 2006 11:01:59 -0700
Tony,ever wonder why some kids were bullys in school?They do what they see at home....Nice people generally came from nice parents...73,Jim K7RDX... -- Original Message -- From: "Tony King - W4ZT" <a
/archives//html/Amps/2006-08/msg00714.html (12,248 bytes)

39. Re: [Amps] Price Help (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Wed, 20 Sep 2006 15:34:33 -0700
These tubes really need to be in an amp circuit to measure useful power output. The filaments can test good with an ohmmeter and hipot can show no conductivity and still have low emission. The fleama
/archives//html/Amps/2006-09/msg00251.html (8,283 bytes)

40. Re: [Amps] Titan 425 Reflected Power (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Mon, 25 Sep 2006 09:48:20 -0700
This thread proves one thing: Comments recieved by those not familiar with this amp or those who have not been into this model or looked at the "Roadmap" were just giving an educated guess of the pro
/archives//html/Amps/2006-09/msg00311.html (11,170 bytes)


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