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Total 35 documents matching your query.

21. Re: [Amps] Fwd: Tubes (score: 1)
Author: c miller <c_miller_1@hotmail.com>
Date: Mon, 12 Mar 2018 18:18:07 +0000
Just a heads up. Your pictures did not make it. I believe that they are blocked in this group? Chris VE3CEA Get Outlook for iOS<https://aka.ms/o0ukef> ________________________________ From: Amps <amp
/archives//html/Amps/2018-03/msg00041.html (7,443 bytes)

22. Re: [Amps] 130 V MOV placement ?? (score: 1)
Author: c miller <c_miller_1@hotmail.com>
Date: Sat, 22 Sep 2018 20:33:48 +0000
Well, if a MOV is only available best placement is line to neutral thus protecting the powered equipment from basic power line differential spikes. To achieve better protection three MOVs are to me u
/archives//html/Amps/2018-09/msg00027.html (9,162 bytes)

23. Re: [Amps] Alpha front panel overlay (score: 1)
Author: c miller <c_miller_1@hotmail.com>
Date: Sat, 10 Nov 2018 23:35:49 +0000
Alpha 76A ETO Amplifier Reproduction Front Panel Ham Radio https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.ca%2Fulk%2Fitm%2F132846441293 Hope this helps Chris VE3CEA Sent from myMail f
/archives//html/Amps/2018-11/msg00042.html (8,285 bytes)

24. Re: [Amps] SS Amps are expensive...why? (score: 1)
Author: c miller <c_miller_1@hotmail.com>
Date: Fri, 25 Jan 2019 18:59:53 +0000
http://rf-kit.de/en/Products.php Process at bottom of page. I believe they were at the new Dayton Hamvention a couple years back. May be an ordering option for future events? Chris VE3CEA Sent from m
/archives//html/Amps/2019-01/msg00126.html (11,817 bytes)

25. Re: [Amps] Remote control of Alpha 9500 (score: 1)
Author: c miller <c_miller_1@hotmail.com>
Date: Mon, 6 May 2019 09:57:49 +0000
Could use a serial converter, say from RS232 to RS422 and then convert it back at the amp. 422 is common in industrial environments for range and noise cancelling. A few commercial computer suppliers
/archives//html/Amps/2019-05/msg00007.html (8,118 bytes)

26. Re: [Amps] Cold neutralization with high voltage bias? (score: 1)
Author: c miller <c_miller_1@hotmail.com>
Date: Thu, 9 May 2019 18:41:48 +0000
Not sure but maybe this weblink may help? https://www.w8ji.com/neutralizing__amplifier.htm Section on adjusting methods. I believe I used the third method to neutralize a Swan 400 PA stage. But it ha
/archives//html/Amps/2019-05/msg00018.html (8,575 bytes)

27. Re: [Amps] Modern Op-Amp shunt stabilizator power supply (for tetrode screen). (score: 1)
Author: c miller <c_miller_1@hotmail.com>
Date: Mon, 28 Feb 2022 19:41:29 +0000
Ran across this at digikey. It is supposedly a direct substitute. https://www.digikey.ca/en/products/detail/texas-instruments/LMC6061AIMX-NOPB/3527047 May be a renumber post merger of the two compani
/archives//html/Amps/2022-02/msg00016.html (9,745 bytes)

28. Re: [Amps] Cleaning and lubrication of ribbon variable coil (score: 1)
Author: c miller <c_miller_1@hotmail.com>
Date: Sun, 14 Aug 2022 17:33:08 +0000
There is some background in the link below here, but basically there is no harm. http://www.w8ji.com/dielectric_grease_vs_conductive_grease.htm Also, silicone grease is used in both the automotive an
/archives//html/Amps/2022-08/msg00011.html (11,426 bytes)

29. Re: [Amps] Phase and amplitude of 2 tube amplifiers (score: 1)
Author: c miller <c_miller_1@hotmail.com>
Date: Sat, 15 Oct 2022 15:52:50 +0000
Circular Polarization Chris VE3CEA Sent from my iPhone _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2022-10/msg00026.html (10,458 bytes)

30. [Amps] Fwd: Pem Nuts ? (score: 1)
Author: c miller <c_miller_1@hotmail.com>
Date: Thu, 27 Oct 2022 00:03:20 +0000
Oops trying again Sent from my iPhone I repaired equipment that used them in various places. Found the pem nuts to be both good and bad. If they were installed in the correct environment where the kn
/archives//html/Amps/2022-10/msg00068.html (10,220 bytes)

31. Re: [Amps] Alpha 86 (score: 1)
Author: c miller <c_miller_1@hotmail.com>
Date: Tue, 8 Nov 2022 17:18:19 +0000
Hey there, Quick glance at the schematic makes me think you may have a open fuse in your slow start section. Try checking F3, F4, or the associated resistors. Chris VE3CEA Sent from my iPhone _______
/archives//html/Amps/2022-11/msg00003.html (8,932 bytes)

32. Re: [Amps] Alpha 86 (score: 1)
Author: c miller <c_miller_1@hotmail.com>
Date: Tue, 8 Nov 2022 21:52:29 +0000
Not too odd really. On 120v it is possible to run the initial startup cycle on just one of the two windings. Then once the soft start circuit bypasses then both windings come into operation and unit
/archives//html/Amps/2022-11/msg00009.html (11,094 bytes)

33. Re: [Amps] Alpha 86 (score: 1)
Author: c miller <c_miller_1@hotmail.com>
Date: Tue, 8 Nov 2022 22:45:15 +0000
Interesting that the board is stencilled lower. If it still regularly blows the one particular fuse, then further investigation may be warranted. If the fuse failure indicates simple overload ( not s
/archives//html/Amps/2022-11/msg00012.html (13,720 bytes)

34. Re: [Amps] Legible Mirage B 5018 G schematic (score: 1)
Author: C Miller <c_miller_1@hotmail.com>
Date: Wed, 11 Dec 2024 22:14:27 +0000
This one looks pretty good. https://archive.org/details/mirage_NewSchematic_B-5018-G Chris VE3CEA Trying to help a friend with a Mirage 5018 amp that is not amplifying. Schematics available are terri
/archives//html/Amps/2024-12/msg00025.html (7,615 bytes)

35. Re: [Amps] Acceptable ripple on high voltage plate power supply in tetrode amplifiers. (score: 1)
Author: C Miller <c_miller_1@hotmail.com>
Date: Wed, 25 Dec 2024 15:20:49 +0000
I ran across this group discussion that went into it a little deeper with another link within the discussion to another area of reference. The are certainly a little more unique way to manage ripple
/archives//html/Amps/2024-12/msg00049.html (22,149 bytes)


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