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Total 30 documents matching your query.

1. [Amps] New Website Address (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Sun, 7 Nov 2004 11:45:11 -0800
Hello Ampers I'm finally getting settled into the new California QTH and have had to change servers for the QRO website as well as my e-mail address. The new website address is listed below and the n
/archives//html/Amps/2004-11/msg00121.html (7,124 bytes)

2. [Amps] Tuned Input Board (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Wed, 9 Feb 2005 06:58:23 -0800
Greetings For those that have asked, the newer 200 watt version of my tuned input board is now available. It can be found here, http://home.earthlink.net/~wd7s/TU-6B.htm Cheers, Paul PAUL HEWITT WD7S
/archives//html/Amps/2005-02/msg00336.html (7,061 bytes)

3. Re: [Amps] Alpha 77Dx -Adding Grounded Grid Filament Choke (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Sat, 5 Mar 2005 07:57:23 -0800
Hi Rich For the 8877 at HF you can save the filament choke, a simple gas discharge spark gap at the cathode will fire long before an internal arc to cathode will jump to the filament. The discharge t
/archives//html/Amps/2005-03/msg00094.html (11,509 bytes)

4. Re: [Amps] Alpha 77Dx -Adding Grounded Grid Filament Choke (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Sat, 5 Mar 2005 08:41:53 -0800
Hi Gerald Eimac recommends the Siemens B1-C145 for the 3CPX5000. I believe Phil, K5PC, has looked for this and found it obsolete, not sure what he crossed it to. I'm using a Bourns 2035-09-B, (90v) f
/archives//html/Amps/2005-03/msg00103.html (10,125 bytes)

5. Re: [Amps] Alpha 77Dx -Adding Grounded Grid Filament Choke (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Sat, 5 Mar 2005 09:25:24 -0800
The gap I'm using is a Bourns 2035 series, 90 volt, 20KA (single pulse), hope the glitch resistor holds !! The gap through Mouser is $3.22 single piece price Arc to ground or internal arc to cathode,
/archives//html/Amps/2005-03/msg00110.html (14,837 bytes)

6. Re: [Amps] Alpha 77Dx -Adding Grounded Grid Filament Choke (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Sat, 5 Mar 2005 09:36:18 -0800
Hi Gary Tricky question !! What size glitch resistor?? How fast is the plate over-current protection, i.e. how much follow on current?? How large is the filter capacitor?? What is the secondary and p
/archives//html/Amps/2005-03/msg00112.html (10,544 bytes)

7. Re: [Amps] Alpha 77Dx -Adding Grounded Grid Filament Choke (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Sat, 5 Mar 2005 09:54:06 -0800
Hi Tomm With the GS-35B, (cathode tied to filament internally) I would use a filament choke and ground one side of the filament secondary, transformer side of the choke of course. A spark gap at the
/archives//html/Amps/2005-03/msg00114.html (17,466 bytes)

8. Re: [Amps] stepper motors (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Wed, 14 Sep 2005 21:22:31 -0700
Hi Tomm Do you know how many turns you need from lock to lock on the vacuum variables? I might have something for you. This link may help you make a choice for the size, http://www.cs.uiowa.edu/~jone
/archives//html/Amps/2005-09/msg00126.html (8,697 bytes)

9. Re: [Amps] Building or Buying a Tuned Input Network (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Sun, 22 Jan 2006 22:52:52 -0800
Hi Bob The reason I don't supply caps or wire for the kit is simple, money!! The number of mica caps I would have to keep in stock would run me into the thousands. Every time you move the board farth
/archives//html/Amps/2006-01/msg00529.html (12,412 bytes)

10. [Amps] Off Topic (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Tue, 23 May 2006 20:16:13 -0700
Greetings ampers Anyone have a current e-mail address for Norm, N8NH? The bright.net one bounced. Please reply off the list. 73, Paul PAUL HEWITT WD7S PRODUCTIONS QRO HOMEBREW COMPONENTS http://home.
/archives//html/Amps/2006-05/msg00307.html (6,686 bytes)

11. Re: [Amps] Alpha 87A Tubes 3CX800A7 and the 3CX P 800A7 ? (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Sun, 30 Dec 2007 16:44:53 -0800
Yes and no. The CPX version is rated for a higher plate voltage than the CX version with the Eimac tube. The CPX tube has a taller ceramic insulating portion at the base. The Svetlana CPX and CX vers
/archives//html/Amps/2007-12/msg00276.html (8,634 bytes)

12. Re: [Amps] 3CPX800A7 (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Fri, 26 Dec 2008 19:57:33 -0800
Hi Rodger Physically the tubes are not the same. The (Eimac)CPX version has a taller ceramic portion allowing a much higher plate voltage, (3500 volts). Svetlana made this tube with the taller cerami
/archives//html/Amps/2008-12/msg00343.html (10,685 bytes)

13. [Amps] FS Input Tuner (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Sun, 23 Jan 2011 18:22:54 -0800
For sale, new in the box LDG AT-100 Amp, automatic input tuner, $100. Never used, still in factory box and wrap with manual. This will ship in a USPS flat rate box for $10. Thanks, Paul PAUL HEWITT W
/archives//html/Amps/2011-01/msg00239.html (6,838 bytes)

14. [Amps] Amp Tuner (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Mon, 24 Jan 2011 06:54:05 -0800
The Tuner is sold, thanks. Paul PAUL HEWITT WD7S PRODUCTIONS QRO HOMEBREW COMPONENTS http://home.earthlink.net/~wd7s _______________________________________________ Amps mailing list Amps@contesting.
/archives//html/Amps/2011-01/msg00245.html (6,506 bytes)

15. [Amps] 8K Ultra (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Sun, 29 Jan 2012 07:05:29 -0800
Greetings All Does anybody know of any "known" issues with this amp? This one appears to be newer than the 1999 schematics show, factory step start, 8 presets and other minor changes. Thanks, Paul PA
/archives//html/Amps/2012-01/msg00257.html (6,878 bytes)

16. Re: [Amps] Transfer Lettering (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Tue, 13 Mar 2012 15:43:17 -0800
Hi Dennis You might try Russell Industries here; http://www.russellind.com/Russell/letterin/main.htm Part number HAM-1 (or 1W) has all the amplifier words you will need as well as lettering and numbe
/archives//html/Amps/2012-03/msg00158.html (8,089 bytes)

17. [Amps] Silicone hose from Flex Technologies (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Fri, 20 Jul 2012 10:19:29 -0700
Greetings A few months ago someone posted the link for this company after using some of their silicone hose for a chimney(s). I bought some of the 2.5 inch hose for a pair of 3cx800's I have. It is a
/archives//html/Amps/2012-07/msg00229.html (7,765 bytes)

18. Re: [Amps] Panel lettering (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Mon, 31 Dec 2012 09:49:56 -0800
Hi Charles You might try here; http://russellind.com/Russell/letterin/main.htm#Electronic Words MarkitŪ They still list the part number, HAM-1W, it has all the radio/amp words made up, black or white
/archives//html/Amps/2012-12/msg00209.html (10,236 bytes)

19. Re: [Amps] Coupling a blower to an air system socket (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Sat, 16 Mar 2013 19:10:17 -0800
Greetings Ian Besides the lower back pressure advantage of blowing into the anode compartment, this method also cools the tank components. This helps reduce themal tuning drift in very hi-Q tanks. 73
/archives//html/Amps/2013-03/msg00228.html (18,858 bytes)

20. Re: [Amps] Meters for HB amps? (score: 1)
Author: "Paul Hewitt" <wd7s@earthlink.net>
Date: Sat, 28 Dec 2013 10:01:28 -0800
Hi Steve The surplus market has been dried up for some time. This site has fair pricing for new meters and has the largest selection I have ever seen. http://www.meterdistributor.com/ 73, Paul PAUL H
/archives//html/Amps/2013-12/msg00155.html (9,570 bytes)

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