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1. [Amps] Noisey Transformer (score: 1): Author: w3nr@vol.com (Ed W3NR); Date: Sun, 10 Mar 2002 17:22:18 -0500; OK, I need some help.....Clipperton L decent shape, BUT.....the transformer has an audible hum....even loafing. As you draw any amount of current the hum gets louder. I tightened the lamination screw; /archives//html/Amps/2002-03/msg00218.html (6,463 bytes)
2. [Amps] Tuned Input ? (score: 1): Author: w3nr@vol.com (Ed W3NR); Date: Tue, 19 Mar 2002 19:35:27 -0500; Is it really necessary to use silver mica's for a tuned input ? , or will disc ceramics suffice ? If silver mica's are needed, does anyone have a surplus supplier or is a trip to Mouser in order. Tha; /archives//html/Amps/2002-03/msg00430.html (7,067 bytes)
3. [AMPS] Filamant CT (score: 1): Author: w3nr@vol.com (Ed W3NR); Date: Sun, 03 Feb 2002 08:56:13 -0500; The filament transformer I am using with an 811A amp has no CT for the B- return, so I just tapped one side of the filament. Is this a good idea or am I asking for a hum problem here. If I make a CT; /archives//html/Amps/2002-02/msg00036.html (6,935 bytes)
4. [AMPS] TNX filament ct (score: 1): Author: w3nr@vol.com (Ed W3NR); Date: Mon, 04 Feb 2002 20:38:55 -0500; Thanks for the many many replies. General consenus is to use a small 6.3 that has a ct, except for Barry ZL1DD's suggestion to use Christmas tree lights per the 1930 HB. Thanks again...73 Ed W3NR --; /archives//html/Amps/2002-02/msg00055.html (6,452 bytes)
5. [AMPS] Surplus Relay (score: 1): Author: w3nr@vol.com (Ed W3NR); Date: Fri, 25 Jan 2002 03:25:14 -0500; I need a source for a surplus 3PDT 10 amp relay. Prefer surplus, or locate one from a list member. Thanks. 73.... Ed W3NR -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contestin; /archives//html/Amps/2002-01/msg00191.html (6,435 bytes)
6. [AMPS] T/R Help (score: 1): Author: w3nr@vol.com (Ed W3NR); Date: Sun, 6 May 2001 08:21:26 -0400; New rig says not to exceed 200 mA on T/R relay. I am using a ClippertonL and am unsure of the current on the T/R relay. Will a smaller current rated relay inbetween the rig and amp suffice ?? Suggest; /archives//html/Amps/2001-05/msg00068.html (6,483 bytes)
7. [AMPS] Clipperton L (score: 1): Author: w3nr@vol.com (Ed W3NR); Date: Sat, 31 Mar 2001 08:13:19 -0500; I have a loud hum-buzz type noise from the power supply on keydown. When running CW it follows my keying like a second sidetone. HV -Grid-Plate readings all seem normal. Am I looking at replacing a p; /archives//html/Amps/2001-03/msg00306.html (5,998 bytes)
8. [AMPS] Bandswitch (score: 1): Author: w3nr@vol.com (Ed W3NR); Date: Fri, 10 Nov 2000 16:44:39 -0500; Am looking for a 3 deck 6 position bandswitch to use in the tank circuit for a 4-811A amp. Anyone have such an animal ??? Thanks...73 Ed W3NR -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submiss; /archives//html/Amps/2000-11/msg00099.html (6,325 bytes)
9. [AMPS] Tuned Input (score: 1): Author: w3nr@vol.com (Ed W3NR); Date: Fri, 10 Nov 2000 17:39:53 -0500; Anyone have a junker Amp Supply or Dentron that is willing to part with the tuned input ?? If so lemme know.... Thanks...73 Ed W3NR -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps; /archives//html/Amps/2000-11/msg00102.html (6,740 bytes)
10. [AMPS] 240VAC Amplifier Wiring (score: 1): Author: w3nr@vol.com (Ed W3NR); Date: Tue, 14 Nov 2000 19:31:13 -0500; I think what Rich means is 8-3 or 6-3. Either is overkill unless you have an extremely long run. But to be safe you might want to consider 8-3 over 10-3. Myself I would go with the 10-3, more than en; /archives//html/Amps/2000-11/msg00146.html (11,167 bytes)
11. [AMPS] Tuned Input (score: 1): Author: w3nr@vol.com (Ed-W3NR); Date: Sat, 18 Nov 2000 15:50:34 -0500; I need some help with the tuned input for 4 811A's. I am using the National 3/8" red core tunable cores for the L. Fixed values for the C. I tried to copy what Collins did in the 30L1, not much luck.; /archives//html/Amps/2000-11/msg00212.html (7,338 bytes)
12. [AMPS] Tuned Input (score: 1): Author: w3nr@vol.com (Ed-W3NR); Date: Wed, 22 Nov 2000 12:54:23 -0500; Should you always tune a tuned input for maximum grid current ?? Assuming the SWR on the line is less than 2 to 1 ?? Could you not also tune for maximum plate current ?? Thanks.....73 Ed W3NR gobble; /archives//html/Amps/2000-11/msg00312.html (6,762 bytes)
13. [AMPS] ClippertonL Help (score: 1): Author: w3nr@vol.com (Ed W3NR); Date: Fri, 13 Oct 2000 11:32:54 -0400; Recently picked up a well used Clipperton. Has 4 new 811A's that I plan on using with the lower plate voltage. Have some questions that hopefully can be answered here. 1. I assume the 9.1 Zener is us; /archives//html/Amps/2000-10/msg00278.html (7,552 bytes)
14. [AMPS] B&W Choke (score: 1): Author: w3nr@vol.com (Ed W3NR); Date: Sun, 22 Oct 2000 19:50:16 -0400; Without digging out the old Knight kit GDO, does anyone know for certain the series resonance of the B&W 802 choke. I know the 800 was resonant around 24-25 Mhz , but not sure of the 802. Any help ou; /archives//html/Amps/2000-10/msg00505.html (6,768 bytes)
15. [AMPS] 572's (score: 1): Author: w3nr@vol.com (Ed W3NR); Date: Mon, 23 Oct 2000 18:13:06 -0400; Plate load impedance for 4-572's ??? I don't see it anywhere in any info I can find on the Net. Any help....thanks Ed W3NR -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesti; /archives//html/Amps/2000-10/msg00523.html (6,454 bytes)
16. [AMPS] Tuned Input (score: 1): Author: w3nr@vol.com (Ed W3NR); Date: Fri, 27 Oct 2000 20:05:05 -0400; Need to build a tuned input for my ClippertonL. Anyone know of a source for the small relays that Amp Supply used in their input circuit ?? Surplus preferred, have already checked Fair, All, and Mous; /archives//html/Amps/2000-10/msg00619.html (6,624 bytes)
17. [AMPS] Plate Choke (score: 1): Author: w3nr@vol.com (Ed W3NR); Date: Fri, 27 Oct 2000 20:15:22 -0400; I am in need of some help on winding a Plate Choke for 4- 811A's to cover 10-160 plus WARC. The form I have has 41/2" of winding space at 3/4" diameter. Is there a decent design out there that will f; /archives//html/Amps/2000-10/msg00620.html (7,174 bytes)

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