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101. [AMPS] Tube info needed TB4/1250 - 5868 (score: 1): Author: vk6apk@eon.net.au (Alek Petkovic); Date: Sat, 15 May 1999 14:16:16 +0800; Hi Art, I asked about this one about a year ago on this reflector. It is a low mu triode and according to those in the know, is not really suited for linear operation. According to the spec sheets I; /archives//html/Amps/1999-05/msg00178.html (7,887 bytes)
102. [AMPS] FCC Actions at Dayton (score: 1): Author: vk6apk@eon.net.au (Alek Petkovic); Date: Fri, 21 May 1999 06:05:24 +0800; Please forgive this Aussie for being confused. Don't all RF amplifiers on the market today operate below 144MHz? (HF Amps that is) Same thing for 24-35MHz. Just what is the supposed offence being com; /archives//html/Amps/1999-05/msg00249.html (10,887 bytes)
103. [AMPS] FCC Actions at Dayton (score: 1): Author: vk6apk@eon.net.au (Alek Petkovic); Date: Fri, 21 May 1999 06:34:24 +0800; Thanks for the explanations guys. One of those named in the mailing by Jim, could hardly be classed as an "individual amateur". He runs the largest radio manufacturing business operating today in Aus; /archives//html/Amps/1999-05/msg00251.html (8,726 bytes)
104. [AMPS] Pile of --- (score: 1): Author: vk6apk@eon.net.au (Alek Petkovic); Date: Sat, 22 May 1999 05:20:49 +0800; Hey Guys, Please accept that, the "pile of bull" comment by me, whilst being factual, was strictly tongue in cheek. Also please be assured that politics, politicians, burocracies and laws ain't no di; /archives//html/Amps/1999-05/msg00271.html (6,725 bytes)
105. [AMPS] Philips Tubes (score: 1): Author: vk6apk@eon.net.au (Alek Petkovic); Date: Sat, 22 May 1999 15:54:52 +0800; Does anybody have a Philips tube manual? If so, can you please look up the following tubes? QY4-250B QB3.5/750 Our club has been using them in a couple of GG field day amps for years and we were wond; /archives//html/Amps/1999-05/msg00277.html (7,060 bytes)
106. [AMPS] Surplus Tubes. (score: 1): Author: vk6apk@eon.net.au (Alek Petkovic); Date: Sat, 22 May 1999 19:35:53 +0800; I have the following tubes which are surplus to my requirements. All are good pulls. Please e-mail me direct if you are interested in any of the above. 2 x 7C24/5762 1 x 8938 1 x 8877/3CX1500A7 1 x 3; /archives//html/Amps/1999-05/msg00278.html (6,618 bytes)
107. [AMPS] Band Pass Filtering (score: 1): Author: vk6apk@eon.net.au (Alek Petkovic); Date: Thu, 29 Apr 1999 05:38:43 +0800; Hey guys, before you get too carried away on where you think the filter should be placed, remember that Jon talked to the guy who makes them and he said the go between the tx and the amp. End of stor; /archives//html/Amps/1999-04/msg00419.html (8,066 bytes)
108. [AMPS] Transformer (score: 1): Author: vk6apk@eon.net.au (Alek Petkovic); Date: Sat, 06 Mar 1999 07:47:42 +0800; I have a Transformer for neon tubes. It is 240V @ 2.06A / 50 Hz primary and 15,000V @ 30mA secondary. (450VA) It is fully enclosed in a green hammertone steel case which measures 9.5"L x 4.25"W x 8.7; /archives//html/Amps/1999-03/msg00118.html (7,279 bytes)
109. [AMPS] SWR/Wattmeter (score: 1): Author: vk6apk@eon.net.au (Alek Petkovic); Date: Thu, 04 Feb 1999 19:34:48 +0800; Yep, it's the ultimate. 73 de Alek, VK6APK. -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-; /archives//html/Amps/1999-02/msg00143.html (7,624 bytes)
110. [AMPS] HV Connectors (score: 1): Author: vk6apk@eon.net.au (Alek Petkovic); Date: Sun, 17 Jan 1999 19:06:18 +0800; You can easily achieve this by sliding a layer of non waxed lunch paper lunch wrap or plain brown paper in between the braid and the dielectric. This stops the common melt down symptoms when the brai; /archives//html/Amps/1999-01/msg00233.html (10,552 bytes)
111. [AMPS] "Technical Material" Amplifier (score: 1): Author: vk6apk@eon.net.au (Alek Petkovic); Date: Thu, 24 Dec 1998 09:32:39 +0800; Yep, Quite a few of us here in VK6 run the TMC amp based on the PL172. The tube is actually the Eimac 8295A ceramic pentode. The part we use is the Intermediate power Amplifier stage of a much larger; /archives//html/Amps/1998-12/msg00358.html (9,530 bytes)
112. [AMPS] SB220 problems (score: 1): Author: vk6apk@eon.net.au (Alek Petkovic); Date: Sat, 26 Dec 1998 19:50:02 +0800; Hi All, A friend of mine in Virginia is having the following nightmare with his SB220. Can anybody help? I have copied and pasted his e-mail and deleted all the expletives. I think. If there's still; /archives//html/Amps/1998-12/msg00408.html (10,541 bytes)
113. [AMPS] Dollars per dB/4cx10000 (score: 1): Author: vk6apk@eon.net.au (Alek Petkovic); Date: Fri, 01 Jan 1999 10:09:41 +0800; Wow! A 4cx10000 in an apartment. Can you imagine the total obliteration of tv and telephones etc. One thing for sure, the neighbours would NOT complain.They simply would have no idea wtf had hit them; /archives//html/Amps/1998-12/msg00533.html (7,719 bytes)
114. Re: [Amps] Y-621B tube questions... (score: 1): Author: Alek Petkovic <vk6apk@eon.net.au>; Date: Sun, 09 Nov 2003 16:53:18 +0800; G'day David, It sounds like one of those little planar triodes. Have a look at the Eimac Quick Reference Catalog. The 8940, 8941 and 8942 may be similar. I have a couple of Y-670A tubes which are not; /archives//html/Amps/2003-11/msg00113.html (9,828 bytes)
115. [Amps] Down (score: 1): Author: Alek Petkovic <vk6apk@eon.net.au>; Date: Sun, 23 Nov 2003 14:58:20 +0800; G'day All, My computer went down and I lost everything. I had an email from a vk ham wanting a 70cm cavity amp and a couple of planar triodes. If that person would care to get in touch with me again,; /archives//html/Amps/2003-11/msg00331.html (6,251 bytes)
116. Re: [Amps] 6lq6 tubes (score: 1): Author: Alek Petkovic <vk6apk@eon.net.au>; Date: Sun, 07 Dec 2003 19:32:16 +0800; Dunno if they are the cheapest but I've had very satisfactory dealings with Radio Electric Supply. http://www.vacuumtubes.net/ 73, Alek VK6APK At 11:46 PM 4/12/2003 -0500, Flys442@wmconnect.com wrote; /archives//html/Amps/2003-12/msg00104.html (7,352 bytes)
117. [Amps] Dentron Clipperton L (score: 1): Author: Alek Petkovic <vk6apk@eon.net.au>; Date: Sun, 04 Jan 2004 18:50:13 +0800; Happy 2004 Ampers I just got myself a Dentron Clipperton L amplifier before Xmas. All four tubes were dead flat so I got it for a good price. I have put 4 new 572B's into the amp and it purrs along v; /archives//html/Amps/2004-01/msg00036.html (7,400 bytes)
118. Re: [Amps] Dentron Clipperton L (score: 1): Author: Alek Petkovic <vk6apk@eon.net.au>; Date: Mon, 05 Jan 2004 06:00:56 +0800; At 06:51 AM 4/01/2004 -0800, R.Measures wrote: ** Are the filaments open? No, the filaments are intact in all four tubes. _______________________________________________ Amps mailing list Amps@contes; /archives//html/Amps/2004-01/msg00040.html (6,815 bytes)
119. Re: [Amps] Step start resistors, another solution (score: 1): Author: Alek Petkovic <vk6apk@eon.net.au>; Date: Tue, 06 Jan 2004 06:06:13 +0800; And Emtron use a thyristor slow start circuit in all their amps. I have not seen any circuits of this but it couldn't be too difficult. It sure works better than anything else I've ever seen. Soft, s; /archives//html/Amps/2004-01/msg00059.html (9,429 bytes)
120. [Amps] More Clipperton L (score: 1): Author: Alek Petkovic <vk6apk@eon.net.au>; Date: Tue, 06 Jan 2004 19:12:49 +0800; G'day Ampers, I had a couple of spare hours today to play with the Dentron Clipperton L amp I mentioned a few days ago. I measured the filament volts at the socket pins. 7.32 Volts was the result! Wi; /archives//html/Amps/2004-01/msg00065.html (6,957 bytes)

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