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1. [Amps] Upgrades for LK500ZC? (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Tue, 17 Jul 2012 14:10:22 -0400
I am in the process of upgrading an LK500ZC and am looking for recommendations: I am currently working on the following: 1. Installing the Harbach Power Supply 2. Installing the Harbach Soft Start 3.
/archives//html/Amps/2012-07/msg00212.html (7,817 bytes)

2. Re: [Amps] Upgrades for LK500ZC? (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Fri, 20 Jul 2012 11:48:42 -0400
Carl, I appreciate your response. I could not find suitable 450v screw down capacitors for less money than Harbach charges (including shipping). I know you can get snap in caps for cheap but is it po
/archives//html/Amps/2012-07/msg00228.html (12,343 bytes)

3. Re: [Amps] Multiple Amplifier Switching Box (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Thu, 23 Aug 2012 17:18:08 -0400
W8ZR created an rig/amplifier switch box and there was a write up on it in QST. http://www.harbachelectronics.com/main/page_products_w8zr_station_pro_w8zr_stationpro.html Take a look as his design in
/archives//html/Amps/2012-08/msg00370.html (9,603 bytes)

4. Re: [Amps] Ameritron plate choke resonances (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Thu, 4 Oct 2012 14:28:24 -0400
This is documented on: http://www.w8ji.com/rf_plate_choke.htm 3-unequal section. 245 µH nominal with resonances at 11.7 and 16.3 MHz. _______________________________________________ Amps mailing list
/archives//html/Amps/2012-10/msg00026.html (7,717 bytes)

5. Re: [Amps] More instability problems (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Fri, 12 Apr 2013 10:57:42 -0400
That sounds like a bad coax jumper. -- Sent from my mobile device _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/am
/archives//html/Amps/2013-04/msg00087.html (9,370 bytes)

6. Re: [Amps] ACOM support (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Sun, 12 May 2013 10:46:07 -0400
A friend of mine is waiting for array solutions to finish fixing his acom 1000. I would call them. 73 Zev n2wks -- Sent from my mobile device _______________________________________________ Amps mail
/archives//html/Amps/2013-05/msg00141.html (7,812 bytes)

7. Re: [Amps] been dead here (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Wed, 12 Mar 2014 16:42:22 -0400
Don't guess. Use the HFTA program to figure out the optimum height for your specific qth 73 Zev n2wks _______________________________________________ Amps mailing list Amps@contesting.com http://list
/archives//html/Amps/2014-03/msg00056.html (8,391 bytes)

8. Re: [Amps] Question: Where to buy? (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Tue, 8 Apr 2014 10:58:20 -0400
I have an LK500ZC. Carl is very active on here and has a LK500Z? also. What were the symptoms before your failure? I had an arc occur and I replaced the choke with the MFJ one and I installed the har
/archives//html/Amps/2014-04/msg00089.html (10,774 bytes)

9. Re: [Amps] Fwd: Visit to USA , New-York , 6th-14een of may 2014 . (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Thu, 24 Apr 2014 09:27:05 -0400
I am not aware of any ham shops in NYC. There are a couple of small stores in nj. There are a few hams who live in NYC and more that work there. The famous Radio row was before my time...my dad took
/archives//html/Amps/2014-04/msg00213.html (8,542 bytes)

10. Re: [Amps] henry amp problem (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Thu, 4 Dec 2014 10:20:53 -0500
I was looking into a similar problem with 2 other Henry Desktop amps having no output. I found this on the web but have not had a chance to review it yet. These seem like a pain in the butt to disass
/archives//html/Amps/2014-12/msg00021.html (9,817 bytes)

11. Re: [Amps] ceramic vs glass (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Sun, 25 Jan 2015 14:59:52 -0500
Looking on eBay and others I almost never see 3cx1200 but plenty of 8877 for $400 and 3cx3000 at realistic prices listed. If my 3cx1200 tube dies I won't replace it...my daily amp is an lk500 for tha
/archives//html/Amps/2015-01/msg00282.html (15,419 bytes)

12. Re: [Amps] Fltr Cap Replacement for Henry 2KD-5 Needed (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Sun, 12 Apr 2015 00:29:39 -0400
You can still get them from Henry. http://radiodan.com/Henry/parts/capacitors.htm You can get less expensive higher voltage/temp options if you go to snap in: http://www.mouser.com/Search/m_ProductDe
/archives//html/Amps/2015-04/msg00069.html (8,003 bytes)

13. Re: [Amps] Time for New Power Meter (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Mon, 20 Apr 2015 19:15:04 -0400
Yes but lp100a at $450 vs alpha 4510a at $745.... I haven't pulled the trigger yet but keep meaning to buy the lp100a _______________________________________________ Amps mailing list Amps@contesting
/archives//html/Amps/2015-04/msg00144.html (11,083 bytes)

14. Re: [Amps] Amps Digest, Vol 149, Issue 10 (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Mon, 04 May 2015 23:22:10 +0000
The FCC does not agree with you. Section 303(n) of the Communications Act of 1934, as amended, (Act) gives the Federal Communications Commission the "authority to inspect all radio installations asso
/archives//html/Amps/2015-05/msg00066.html (12,634 bytes)

15. Re: [Amps] LK-500ZB (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Fri, 2 Oct 2015 15:30:24 -0400
The one in my LK500ZC amp looks like this: https://www.rfparts.com/filrfc30.html or you can buy what I'm assuming is the identical part from the AL82 from Ameritron: http://www.ameritron.com/Product.
/archives//html/Amps/2015-10/msg00001.html (7,620 bytes)

16. Re: [Amps] SB220 step start blows fuses (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Mon, 26 Jun 2017 10:02:59 -0400
The filter capacitor assembly can slide out during reassembly and short to the chasis which would cause the stepstart to blow.....just something to check in your troubleshooting. Zev N2WKS __________
/archives//html/Amps/2017-06/msg00275.html (9,150 bytes)

17. Re: [Amps] Need Fan for amp (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Thu, 11 Jan 2018 15:25:53 -0500
I put in an ebm papst 4600z into mine. I don't find it particularly quiet....has too much of a high pitched wine on high speed for my liking but it works....specs say 45dba Look at the dimensions and
/archives//html/Amps/2018-01/msg00063.html (8,557 bytes)

18. Re: [Amps] Attenuation of signal (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Sun, 21 Jan 2018 18:04:52 +0000
_______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2018-01/msg00124.html (7,760 bytes)

19. Re: [Amps] Amp Supply LK-500 no tune manual (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Fri, 16 Feb 2018 09:46:12 -0500
Did you look at this one? http://www.radiomanual.info/schemi/ACC_PA/Amp_Supply_LK-400_LK-500_series_user_1988.pdf see page 40 BTW, The QSK circuit on these looks like it is designed to run with an ex
/archives//html/Amps/2018-02/msg00034.html (8,311 bytes)

20. Re: [Amps] What happened to the G8WRB tube data site? (score: 1)
Author: Zev Darack <zevdarack@gmail.com>
Date: Tue, 5 Nov 2019 14:37:47 -0500
You can still access the site via the internet archives https://web.archive.org/web/20181013122135/http://www.g8wrb.org/ 73, Zev N2WKS _______________________________________________ Amps mailing lis
/archives//html/Amps/2019-11/msg00036.html (8,913 bytes)

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