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Total 654 documents matching your query.

1. Re: [Amps] 220V service for amplifier (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Wed, 03 Dec 2003 12:20:36 -0500
ka1xo@juno.com wrote: Dear Jason, On your amplifier there will more than likely be an attachment to the metal box where a grounding conductor can terminate. The metal frame of your amplifier should h
/archives//html/Amps/2003-12/msg00037.html (10,599 bytes)

2. Re: [Amps] Re: 220v service for amps (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Fri, 05 Dec 2003 20:11:40 -0500
He forgot to mention that if you run a line to another building and install a sub panel there that you ground the sub panel to an earth ground. The ground connections in the sub panel are treated the
/archives//html/Amps/2003-12/msg00074.html (11,414 bytes)

3. Re: [Amps] Re: Neutral and ground is in how you use them (was SB-220on 220V) (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Sun, 07 Dec 2003 22:18:03 -0500
R.Measures wrote: ** The neutral in the 240V outlet for the amplifier is shared with every 120V and every 240V circuit in the house because All of the neutrals connect to the neutral/ground terminal
/archives//html/Amps/2003-12/msg00120.html (12,944 bytes)

4. Re: [Amps] Re: Neutral and ground is in how you use them (was SB-220on 220V) (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Mon, 08 Dec 2003 12:30:39 -0500
R. Measures wrote: R.Measures wrote: ** The neutral in the 240V outlet for the amplifier is shared with every 120V and every 240V circuit in the house because All of the neutrals connect to the neutr
/archives//html/Amps/2003-12/msg00130.html (15,501 bytes)

5. Re: [Amps] Home Built Amp (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Thu, 11 Dec 2003 12:23:23 -0500
Don't be too hard on the guy. That fan is just like the one in the SB200 and not even as close to the tubes. It looks like the guy used what he had or could scrounge to build it. Even home brew plate
/archives//html/Amps/2003-12/msg00179.html (8,956 bytes)

6. [Amps] Buck boost transformer (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Wed, 17 Dec 2003 11:15:46 -0500
How would it work if you used a plate transformer with a little higher output than wanted. Install the secondary of a small buck transformer in the primary of the plate transformer. In the primary of
/archives//html/Amps/2003-12/msg00283.html (9,216 bytes)

7. Re: [Amps] 3.5 kV 2A REGULATED Power Supply: Schematic ? (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Mon, 29 Dec 2003 20:56:09 -0500
Dr. William J. Schmidt, II wrote: <<** Ian -- For AB2, yes, but for AB1, control grid V-stability matters not since there is no grid current. >> Look. It does not matter if the tube draws grid curren
/archives//html/Amps/2003-12/msg00458.html (10,614 bytes)

8. Re: [Amps] 3.5 kV 2A REGULATED Power Supply: Schematic ? (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Tue, 30 Dec 2003 22:17:24 -0500
I think he is just being stubborn. :>) There is nothing wrong with running the exciter and power amp at below maximum level. As Rich points out "that is the proper way to run them". The exciter shoul
/archives//html/Amps/2003-12/msg00476.html (11,479 bytes)

9. Re: [Amps] matching network (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Mon, 26 Jan 2004 15:17:34 -0500
Should have left the 6146 and 6CL6 in there. They had a negative feedback circuit around all 3 stages to reduce IMD. 73 Gary K4FMX Ray Burke wrote: At one time, before the GPS satellites made them re
/archives//html/Amps/2004-01/msg00296.html (8,571 bytes)

10. Re: [Amps] SB-220 metering (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Sat, 31 Jan 2004 14:02:53 -0500
Static on the plastic meter face? 73 Gary K4FMX Gudguyham@aol.com wrote: In a message dated 1/30/04 11:42:35 PM Eastern Standard Time, n4zr@contesting.com writes: It occurs to me that a couple of yea
/archives//html/Amps/2004-01/msg00378.html (9,022 bytes)

11. Re: [Amps] bird 43 slug (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Sat, 31 Jan 2004 14:04:18 -0500
The higher the power slug the more broad band. 73 Gary K4FMX Tom Norris wrote: Yes, while with a calibration lab some years ago, we were able to get Bird to custom make a couple of Model 43 elements.
/archives//html/Amps/2004-01/msg00379.html (8,622 bytes)

12. Re: [Amps] FL2100b on SIX? Possible (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Sun, 08 Feb 2004 12:05:13 -0500
Gudguyham@aol.com wrote: In a message dated 2/7/04 01:19:44 AM Eastern Standard Time, stevek@jmr.com writes: Look all over the net! can't find a mod to put the FL2100b onto sixmeters. Any ideas? //Th
/archives//html/Amps/2004-02/msg00050.html (8,699 bytes)

13. Re: [Amps] MagCap Engineering ? (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Mon, 09 Feb 2004 11:09:28 -0500
What is the cost of each? Thanks Gary K4FMX Partain, Chuck wrote: I got the MagCap transformer last week. 2800v 1.5a ccs weight about 48# and secondary winding resistance 24 ohm this is an "equivalen
/archives//html/Amps/2004-02/msg00054.html (10,029 bytes)

14. Re: [Amps] tube cooling (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Tue, 17 Feb 2004 16:04:01 -0500
Ian White, G3SEK wrote: Turbulence is vital for effective cooling. If the air flow over a hot surface is gentle (laminar) there is always a stagnant boundary layer of hot air which effectively insula
/archives//html/Amps/2004-02/msg00154.html (10,052 bytes)

15. Re: [Amps] tube cooling (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Wed, 18 Feb 2004 13:06:41 -0500
Ian White, G3SEK wrote: Gary Schafer wrote: Ian White, G3SEK wrote: Turbulence is vital for effective cooling. If the air flow over a hot surface is gentle (laminar) there is always a stagnant bounda
/archives//html/Amps/2004-02/msg00166.html (13,309 bytes)

16. Re: [Amps] Output Impedance 4-572B's in Parallel (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Wed, 18 Feb 2004 13:08:02 -0500
Plate volts divided by plate amps. 73 Gary K4FMX Tim Long wrote: Sorry if this has been asked & answered before; just searched the archives and couldn't find it. What is the load impedance of four 57
/archives//html/Amps/2004-02/msg00167.html (7,930 bytes)

17. [Amps] Cooling tubes article (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Sat, 28 Feb 2004 16:56:07 -0500
Just ran across the article by Orr that he wrote for QST on cooling tubes. Read it years ago. It is in the September 1967 QST, page 20. Lots of good stuff on selecting blower size etc. 73 Gary K4FMX
/archives//html/Amps/2004-02/msg00300.html (6,916 bytes)

18. Re: [Amps] sb-220 tuning question - closing in (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Wed, 03 Mar 2004 12:01:09 -0500
The plate tune capacitor should be the LAST thing that you tune. It should also be the first thing that you tune. When you start out apply a small amount of drive and dip the plate with the plate tun
/archives//html/Amps/2004-03/msg00033.html (10,294 bytes)

19. [Amps] Transformer taps (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Sun, 21 Mar 2004 19:16:09 -0500
I have a plate transformer that has taps at 2000, 2500 and 3000 with a common center tap. Obviously made for a full wave rectifier to supply 1000, 1250 or 1500 volts rectified. I will use it with a f
/archives//html/Amps/2004-03/msg00239.html (6,922 bytes)

20. [Amps] DVM recomendation (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Wed, 05 May 2004 12:41:19 -0400
I am in need of a decent digital volt meter. Looking for a handheld preferably with true rms readings. Would like to have DC error around .25% or better. Fluke is apparently the Cadillac but expensiv
/archives//html/Amps/2004-05/msg00055.html (6,990 bytes)

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