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References: [ +from:phgerhardt@gmail.com: 22 ]

Total 22 documents matching your query.

1. Re: [Amps] PEP Wattmeter (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Fri, 2 Oct 2009 15:21:35 -0400
Rob I have my 1968 Raytrack DX2000L on the 'bench' and I have it pretty much going, it is now putting out about 900-1000 watts into a Heath Cantenna measured by an MFJ which was once (years ago ) ck'
/archives//html/Amps/2009-10/msg00027.html (7,546 bytes)

2. [Amps] Blower Restrictor QU? (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Thu, 15 Oct 2009 14:31:28 -0400
Today I removed the 'retrictor plate' on the blower inlet on the Raytrack DX2000L that I am getting ready to put back in service. Over the 20 years that I have owned (but hardly used) the amp I have
/archives//html/Amps/2009-10/msg00218.html (7,196 bytes)

3. Re: [Amps] Blower Restrictor QU? (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Fri, 16 Oct 2009 12:08:45 -0400
Thanks for all the comments on the Blower restrictor. It will stay off for a while. The reason for it although not obvious to me at first is Very Obvious when you look at it from a safety viewpoint.
/archives//html/Amps/2009-10/msg00232.html (7,791 bytes)

4. [Amps] SRS 360? (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Sat, 31 Oct 2009 17:10:00 -0400
Do these ever get used in Amateur service? Looks like a 3-500z http://www.radiomuseum.org/tubes/tube_srs360.html ? Paul K3PG -- Paul Gerhardt K3PG http://pgerhardt.blogspot.com QRP ARCI 6674 FP 274 _
/archives//html/Amps/2009-10/msg00359.html (6,932 bytes)

5. [Amps] Testing tubes for an Alpha 78 (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Thu, 31 Dec 2009 17:28:44 -0500
Can you test tubes in an Alpha 78 one at a time? What is a good procedure for doing this? Paul Gerhardt K3PG http://pgerhardt.blogspot.com QRP ARCI 6674 FP 274 Raytrack DX2000L Clipperton L SB-230 __
/archives//html/Amps/2009-12/msg00582.html (6,518 bytes)

6. [Amps] Alpha 78 Control Circuit 'Issue' (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Thu, 21 Jan 2010 20:24:15 -0500
Any Alpha 78 techs? Am having trouble with the control circuitry. TR switching works if in standby. (it is putting out power in 'standby') When CW OR SSB buttons are down the 78 stays in Transmit. 60
/archives//html/Amps/2010-01/msg00273.html (6,973 bytes)

7. Re: [Amps] Alpha 78 Control Circuit 'Issue' (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Fri, 22 Jan 2010 02:21:19 -0500
Thinking about the control voltage 20V or so being present at the relay jack even in Standby lead me to discover that the QSK board CB-3 has been modified. The trace to the Aux/Key jack has been cut
/archives//html/Amps/2010-01/msg00274.html (8,178 bytes)

8. Re: [Amps] Alpha 78 Control Circuit 'Issue' (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Fri, 22 Jan 2010 23:40:10 -0500
_______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2010-01/msg00280.html (15,967 bytes)

9. [Amps] Connecting the FT-1000MP to Acom 2000A or other QSK Amp (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Mon, 22 Feb 2010 19:18:45 -0500
For the CW contest last weekend I made this cable for an MP MK-V and hooked up the Alpha 78 for a try at QSK. The TX Inhibit did not work on the rig is there some trick to turning it on or is it even
/archives//html/Amps/2010-02/msg00666.html (7,959 bytes)

10. Re: [Amps] TX Inhibit on MK-V (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Wed, 24 Feb 2010 11:06:16 -0500
Jim thanks for your write up on the Tx Inhibit. I made a cable using the Acom link below but and the QSK worked fine with my Alpha 78 but the TX Inhibit did not 'come on' when I plugged the din in. I
/archives//html/Amps/2010-02/msg00721.html (8,253 bytes)

11. Re: [Amps] how much C in PS is too much? (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Mon, 22 Mar 2010 09:35:54 -0400
Ck item number 350328801537 on flea-bay 3 days to go for this item -- Paul Gerhardt K3PG http://pgerhardt.blogspot.com QRP ARCI 6674 FP 274 _______________________________________________ Amps maili
/archives//html/Amps/2010-03/msg00462.html (7,831 bytes)

12. Re: [Amps] Why people don't build amps. (Roger) (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Fri, 26 Mar 2010 11:30:46 -0400
Roger and Lee reminded me of a great book I read last year or so. It is relevant to using tools and building and is a great read. More about motorcycle mechanics than radio but my wife says it was ev
/archives//html/Amps/2010-03/msg00644.html (7,906 bytes)

13. [Amps] K5VT SK (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Wed, 28 Apr 2010 17:49:02 -0400
There is one less Voo-Dude contester following the untimely passing of Vince Thompson K5VT <http://www.cadxa.org/>. Diagnosed very recently with leukemia, Vince was unable to tolerate the resulting t
/archives//html/Amps/2010-04/msg00688.html (6,946 bytes)

14. [Amps] Mr. 'Raytrack' K8ICB SK (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Mon, 28 Nov 2011 16:15:11 -0500
Received this eMail over the weekend. Hello Paul, I hope this email address still works ... I read with interest your 2010 BLOG on amplifiers and specifically the Raytrack DX-2000L along with your me
/archives//html/Amps/2011-11/msg00162.html (7,643 bytes)

15. [Amps] Alpha 78 Failure (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Tue, 27 Dec 2011 13:38:05 -0500
After a couple of years working well and many thousands of Q's the Alpha 78 quit. It still switches to xmit, I can hear the relays, there is a small amount of grid current but no plate current so I a
/archives//html/Amps/2011-12/msg00231.html (7,312 bytes)

16. Re: [Amps] Alpha 78 failure (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Wed, 15 Feb 2012 11:34:35 -0500
After a couple of years working well and many thousands of Q's the Alpha 78 quit.  It still switches to xmit, I can hear the relays, there is a small amount of grid current but no plate current so I
/archives//html/Amps/2012-02/msg00174.html (8,349 bytes)

17. Re: [Amps] Alpha 78 Failure (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Thu, 16 Feb 2012 07:58:21 -0500
Message: 7 Date: Wed, 15 Feb 2012 11:34:35 -0500 From: Paul Gerhardt <phgerhardt@gmail.com> Subject: Re: [Amps] Alpha 78 failure To: amps@contesting.com Message-ID:        <CACkHHUKBnJqKzt0_EpK5CfXW4
/archives//html/Amps/2012-02/msg00195.html (10,304 bytes)

18. Re: [Amps] Alpha 78 failure (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Thu, 16 Feb 2012 16:39:45 -0500
Working again Thanks ! I really should try to start at the beginning in troubleshooting. When I finally got to checking the bias at the tube sockets it was fine. So I checked the filaments and the v
/archives//html/Amps/2012-02/msg00210.html (8,747 bytes)

19. Re: [Amps] Alpha 78 Failure (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Mon, 20 Feb 2012 14:11:35 -0500
Paul Gerhardt K3PG http://pgerhardt.blogspot.com QRP ARCI 6674 FP 274 "You must do this work with love or you fail." -- John Muir, from How to Keep Your Volkswagen Alive ____________________________
/archives//html/Amps/2012-02/msg00232.html (7,281 bytes)

20. [Amps] Alpha 78 parts? (score: 1)
Author: Paul Gerhardt <phgerhardt@gmail.com>
Date: Tue, 25 Nov 2014 13:59:45 -0500
The Alpha 78 (from Vince and VooDoo Group) has been running for years but this week it had a failure of one of the meter bulbs that change color when the rig warms up. I may look at the caps too. Any
/archives//html/Amps/2014-11/msg00046.html (6,687 bytes)

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