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1. Re: [Amps] Svetlana 4CX800 (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Tue, 8 Dec 2009 13:22:05 -0500
Array Solutions may have them as well. A few months ago I got a matched pair of NOS tubes for $550. They were matched and tested by Vine in the UK. 73, Dick WC1M 4CX800 ______________________________
/archives//html/Amps/2009-12/msg00233.html (8,972 bytes)

2. Re: [Amps] Life of 3CX800 tubes (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Thu, 10 Dec 2009 14:57:26 -0500
For reference, the original 3CX800 tubes in my 87A, which is going on 15 years old, are still producing full output (>2200W) into a dummy load on 160m-10m. If the 89 is anything like the 87A, which I
/archives//html/Amps/2009-12/msg00270.html (10,110 bytes)

3. Re: [Amps] Alpha 87A Alphamax upgrade (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Mon, 4 Jan 2010 12:34:36 -0500
What hard fault are you getting? 73, Dick WC1M _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2010-01/msg00018.html (9,735 bytes)

4. Re: [Amps] Alpha 87A was humming along nicely when... (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Sun, 11 Apr 2010 01:40:08 -0400
Did you see a hard fault code displayed when the amp was restarted? If not, you should dump the hard and soft fault tables using the RS-232 interface. The information there may be helpful. My guess w
/archives//html/Amps/2010-04/msg00366.html (8,069 bytes)

5. Re: [Amps] LK550 neg grid ... and bandswitch woes (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Sat, 11 Dec 2010 14:58:16 -0500
You might want to consider how the plate choke got fried in the first place. I've had that problem with an LK-550ZC. It was caused by an arc from a bad tube. I believe the tube's vacuum was compromis
/archives//html/Amps/2010-12/msg00109.html (13,151 bytes)

6. Re: [Amps] 87a Fault 9 (score: 1)
Author: Dick Green WC1M <wc1m73@gmail.com>
Date: Mon, 03 Jan 2011 14:02:52 -0500
First, Iıd like to echo Paulıs comments about the 87A. Like all equipment, it needs maintenance from time to time. But Iıve been able to keep mine running for over 15 years. Alpha has always been ext
/archives//html/Amps/2011-01/msg00028.html (10,870 bytes)

7. Re: [Amps] Amp Supply LK-500ZB Upgrades? (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Sat, 19 Feb 2011 16:47:06 -0500
I have an LK-550ZC, and while I think the amps are similar, I'm not familiar with the specific differences. That said, I can offer the following: 1. The problem with the fan system is that it doesn't
/archives//html/Amps/2011-02/msg00143.html (11,318 bytes)

8. Re: [Amps] 87 a query re align motors? (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Sat, 26 Mar 2011 14:20:51 -0400
Does this happen on all bands? Did this happen suddenly? Was the amp working OK before that? Was there any indication of a problem before the amp got into this state? If it happens on one or two band
/archives//html/Amps/2011-03/msg00208.html (8,689 bytes)

9. Re: [Amps] 87 a query re align motors? (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Sat, 26 Mar 2011 14:46:32 -0400
Replacement of the PIN diodes, by itself, would not have cleared the segment memories. I guess RF Concepts could have accidentally wiped the memories when doing diagnostics before or after the replac
/archives//html/Amps/2011-03/msg00209.html (13,038 bytes)

10. Re: [Amps] 4 wire 240VAC service? What to do now? (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Mon, 4 Apr 2011 13:49:48 -0400
Yes, and the neutral and ground must be isolated in any subpanels as well. However, there's one exception: if the subpanel is more than a certain distance from the main panel (not sure how far), such
/archives//html/Amps/2011-04/msg00113.html (10,481 bytes)

11. Re: [Amps] Alpha 87a famous Fault 9 (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Fri, 16 Dec 2011 16:49:16 -0500
Charles, We had some correspondence about this back in January. As you may recall, my amp had similar symptoms, though sometimes I got fault 8 or 11 instead of fault 9. I determined that one of the e
/archives//html/Amps/2011-12/msg00123.html (9,973 bytes)

12. Re: [Amps] LK 550-ZC (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Thu, 15 Mar 2012 17:12:55 -0400
As far as I know, there was no individual manual for the ZC. I think the "400/500 Series" manual was intended to cover all the variations in both series. I don't recall exactly what set the ZC apart
/archives//html/Amps/2012-03/msg00185.html (9,511 bytes)

13. Re: [Amps] LK 550-ZC (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Sat, 17 Mar 2012 01:16:18 -0400
Guess I have a real late one: it has the fan speed temperature sensor. The stock fan speed is too slow in low-speed mode, so the fan cycles low-high constantly. And it's like a freight train at high-
/archives//html/Amps/2012-03/msg00192.html (13,426 bytes)

14. Re: [Amps] LK 550-ZC (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Sat, 17 Mar 2012 14:13:37 -0400
I use mostly CW, with varying lengths of transmission. But there's a big difference between the modes I use for operating and what I did to test the tube temperature before and after the mod. I trans
/archives//html/Amps/2012-03/msg00199.html (12,393 bytes)

15. Re: [Amps] Amp Supply LK500ZC info needed (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Tue, 24 Apr 2012 15:56:51 -0400
Here's a version: http://bama.edebris.com/manuals/ampsuply/lk450-550 73, Dick WC1M _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/ma
/archives//html/Amps/2012-04/msg00229.html (7,636 bytes)

16. Re: [Amps] soldering vs crimping (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Wed, 2 May 2012 12:51:20 -0400
I'm with Carl on this one. Actually, the crimp N-connectors I use have center pins designed to be crimped *and* soldered -- there's a little hole in the side for soldering. I've found that there's so
/archives//html/Amps/2012-05/msg00063.html (17,363 bytes)

17. Re: [Amps] Fwd: Re: soldering vs crimping (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Wed, 2 May 2012 15:51:25 -0400
Wise words. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2012-05/msg00082.html (10,895 bytes)

18. Re: [Amps] Fwd: Re: soldering vs crimping (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Wed, 2 May 2012 15:51:25 -0400
I do that too. I believe I solder the braid about as well as anyone, and I use the good Amphenol silver connectors, etc., so there's no problem with the solder sticking. I said it's tricky to contro
/archives//html/Amps/2012-05/msg00083.html (10,473 bytes)

19. Re: [Amps] brittle shields? and soldering vs crimping (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Wed, 2 May 2012 15:55:44 -0400
Allow me to clarify. The joint becomes brittle, not the material. I think what happens is that the solder penetrates the entire braid, from surface to dielectric, fixing the strands in place. As the
/archives//html/Amps/2012-05/msg00084.html (13,233 bytes)

20. Re: [Amps] soldering vs crimping (score: 1)
Author: "Dick Green WC1M" <wc1m73@gmail.com>
Date: Thu, 3 May 2012 13:05:58 -0400
Right, and I'm not sure there's a better alternative to using the hole. The only other way to solder the center pin is to leave a small space between the opening of the pin and the dielectric, heat
/archives//html/Amps/2012-05/msg00119.html (11,634 bytes)


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