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Total 309 documents matching your query.

1. [Amps] Re: Some suggestions... (score: 1)
Author: (Roy Koeppe)
Date: Fri, 17 Jan 2003 08:33:19 -0600
Inquired, "I am going to a swap this weekend. I will be looking for some wire to wind the plate choke in my new project. What should I use?" (etc.) Modern #24 "enameled" is fine. Most are rated at le
/archives//html/Amps/2003-01/msg00137.html (6,399 bytes)

2. [Amps] Re: XR-50... (score: 1)
Author: (Roy Koeppe)
Date: Thu, 5 Dec 2002 15:22:56 -0600
Bill, I have some brand new in their unopened factory plastic bags with instruction sheet inside. How many do you need? Roy K6XK/0 Iowa "Has anyone got a source for National XR-50 1/2 inch diameter b
/archives//html/Amps/2002-12/msg00093.html (6,237 bytes)

3. [Amps] Re: Interesting Plate Choke (score: 1)
Author: (Roy Koeppe)
Date: Fri, 8 Nov 2002 08:44:55 -0600
Yes, interesting. Years ago pi-wound chokes were replaced by solenoid styles because of the very reason that solenoids did exhibit beneficial, multi-parallel resonant modes. Operating in the vicinity
/archives//html/Amps/2002-11/msg00125.html (7,259 bytes)

4. [Amps] Re: Transformers (score: 1)
Author: (Roy Koeppe)
Date: Tue, 12 Nov 2002 08:04:06 -0600
I bought mine from Amidon. 73, Roy K6Xk "I am trying to duplicate a transmission line transformer and need to find some "scotch no. 92 " tape. can anyone point me in the right direction ??? thanks. !
/archives//html/Amps/2002-11/msg00187.html (6,222 bytes)

5. [Amps] Re: Fan noise (score: 1)
Author: (Roy Koeppe)
Date: Fri, 30 Aug 2002 07:54:16 -0500
About, "I acquired a Henry 2k-3 amp tabletop amp that works fine but the acoustic fan noise is so bad I have to keep it 20 feet away." I finally resorted to using a remote squirrel cage located in a
/archives//html/Amps/2002-08/msg00335.html (6,350 bytes)

6. [AMPS] 4CX1600B source? (score: 1)
Author: (Roy Koeppe)
Date: Thu, 10 Jan 2002 18:08:23 -0600
Men, Does anyone know where I can purchase the now illusive 4CX1600B? It seems to suddenly be as scarce as proverbial hens teeth. TNX, Roy K6XK/0 -- FAQ on WWW: http://www.contesting
/archives//html/Amps/2002-01/msg00082.html (6,532 bytes)

7. [AMPS] Re: SB-220 cooling (score: 1)
Author: (Roy Koeppe)
Date: Fri, 12 Oct 2001 14:23:41 -0500
Said, and right on, "Surely. So what kind of a schmo is going to slide his hand down into the HV supply?" Exactly...driving down the freeway at 70 mph requires just a little inadvertent tug on the st
/archives//html/Amps/2001-10/msg00307.html (6,799 bytes)

8. [AMPS] Re: Meter lamp in SB-200 (score: 1)
Author: (Roy Koeppe)
Date: Thu, 21 Jun 2001 08:05:40 -0500
About... does anyone know what kind of light will work in the meter of the SB200? Yes, it's a common type 47 lamp. 73, Roy K6XK -- FAQ on WWW: Submissions: amps@con
/archives//html/Amps/2001-06/msg00226.html (6,471 bytes)

9. [AMPS] Re: Self Osc... (score: 1)
Author: (Roy Koeppe)
Date: Sun, 6 May 2001 16:11:49 -0500
Jim inquires, "A problem for all the expertsI Built a 3-1000Z monoband amp for 10 meters. I Sowly Variaced it up and it seems ok at 1500volts. Put 3KV on it and it will make a few watts of power with
/archives//html/Amps/2001-05/msg00081.html (6,994 bytes)

10. [AMPS] Re: removable xfmr (score: 1)
Author: (Roy Koeppe)
Date: Fri, 5 Jan 2001 08:42:42 -0600
Asked, "Could anyone tell me the manufacturers of full gallon amps which have the power transformer easily removable for shipping? Thanks Dick W5AA" The Titan II's plate xfmr can be removed in about
/archives//html/Amps/2001-01/msg00160.html (6,527 bytes)

11. [AMPS] Re: Amps with QSK (score: 1)
Author: (Roy Koeppe)
Date: Thu, 11 Jan 2001 16:16:40 -0600
Titan II 73, Roy K6XK/0 "Hello out there! Can anyboydy tell me which amps have QSK? Best 73 de Ken / SM7CQY" -- FAQ on WWW: Submissions: Adminis
/archives//html/Amps/2001-01/msg00340.html (6,781 bytes)

12. [AMPS] Re: Amps with QSK (score: 1)
Author: (Roy Koeppe)
Date: Fri, 12 Jan 2001 08:29:48 -0600
Asked, Titan II 73, Roy K6XK/0 What are the make/break times, Roy? Quoting from the owner's manual, "CW BREAK-IN: Built-in T/R switching in less than 7 ms." 40 wpm sounds just fine with no adjustment
/archives//html/Amps/2001-01/msg00344.html (6,949 bytes)

13. [AMPS] Re: Two XFMRs Parallel... (score: 1)
Author: (Roy Koeppe)
Date: Wed, 17 Jan 2001 08:14:50 -0600
About. "I have two unit transformer with different manufacturer, one of them are 1880 volt and 0.6A RMS secunder, and another are 1870 volt and 0.4A RMS secunder. Actual voltage when connected to AC
/archives//html/Amps/2001-01/msg00414.html (8,750 bytes)

14. [AMPS] Re: Two XFMRs parallel (score: 1)
Author: (Roy Koeppe)
Date: Wed, 17 Jan 2001 16:42:01 -0600
Concerning: "Heat will happen, and maybe failure. It is not advisable to directly parallel two same-kind transformers, and parallelling two dissimilar transformers is a real bad thing. The effect, if
/archives//html/Amps/2001-01/msg00430.html (7,166 bytes)

15. [AMPS] Titan II Mods (score: 1)
Author: (Roy Koeppe)
Date: Tue, 26 Dec 2000 10:34:37 -0600
Hello All, In case others are frustrated with their Titan II's, I offer them this FYI: My new Xmas present to myself had a fan which sounded like a helicopter and even shook the table. I cured that e
/archives//html/Amps/2000-12/msg00311.html (9,944 bytes)

16. [AMPS] Re: multiple fil xfmrs (score: 1)
Author: (Roy Koeppe)
Date: Thu, 28 Dec 2000 08:04:23 -0600
Hope I understood this: "Does anyone have any knowledge about how I go about feeding a dual 4-1000A grounded grid amplifier with a dual 7.5V 21A CT secondary filament transformer?" Just simply connec
/archives//html/Amps/2000-12/msg00333.html (6,614 bytes)

17. [AMPS] Re: 5.6 mHz ant (score: 1)
Author: (Roy Koeppe)
Date: Fri, 29 Dec 2000 17:17:59 -0600
For a quarter wave vert the formula is 234/5.6 73, Roy K6XK Iowa -- FAQ on WWW: Submissions: Administrative requests:
/archives//html/Amps/2000-12/msg00360.html (6,340 bytes)

18. [AMPS] Re: DC on fil again... (score: 1)
Author: (Roy Koeppe)
Date: Wed, 1 Nov 2000 16:55:42 -0600
Mike asked, " Whilst reading all the thoughts about DC filaments, something crossed my mind. If we use say 6.3VAC as normal filament voltage and switch to DC, wouldn't the DC equivalent for heating p
/archives//html/Amps/2000-11/msg00011.html (6,709 bytes)

19. [AMPS] Re: quad of 811As input values (score: 1)
Author: (Roy Koeppe)
Date: Sat, 18 Nov 2000 16:05:58 -0600
Ed, W3NR asked, "I need some help with the tuned input for 4 811A's..." Ed, Presuming the total input Z is about 60 ohms, then the values are as follows (Q=2): 160M C1: 3300 C2: 3100 L: 3.53 80M 1700
/archives//html/Amps/2000-11/msg00214.html (7,070 bytes)

20. [AMPS] Re: Max-"CON" (score: 1)
Author: (Roy Koeppe)
Date: Sun, 19 Nov 2000 13:09:04 -0600
This is a multi-part message in MIME format. --=_NextPart_000_005F_01C05229.E4690B00 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable I think you intended
/archives//html/Amps/2000-11/msg00222.html (8,571 bytes)

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