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1. Re: [Amps] Henry solid state (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Wed, 20 Aug 2003 18:09:49 -0700 (PDT)
You're most likely overdriving it -- if memory serves, you can't drive it with the same levels in SSB that you can in FM because it's running class C. Try driving it with 3 to 5W instead and see what
/archives//html/Amps/2003-08/msg00000.html (7,590 bytes)

2. Re: [Amps] Best place/type 3-500Z tube ? (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Sun, 12 Oct 2003 09:57:37 -0700 (PDT)
Hi John, I bought a matched pair of 3-500ZGs from RF Parts (their brand -- I think they're OEM'ed by Taylor) almost a year ago and love them. I run them at ~300W+ carrier on AM in my TL-922 quite reg
/archives//html/Amps/2003-10/msg00099.html (8,244 bytes)

3. Re: [Amps] Best place/type 3-500Z tube ? (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Tue, 14 Oct 2003 14:00:35 -0700 (PDT)
Far as I know, the RF Parts Tubes and the Taylors are made side by side in China. The RF Parts tubes have a prorated second year on the warranty, the Taylors only have 1 year limited warranty. I boug
/archives//html/Amps/2003-10/msg00129.html (9,554 bytes)

4. RE: [Amps] Future availability of 3cx1200a7 and 3cx1500a7 (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Fri, 24 Oct 2003 08:48:56 -0700 (PDT)
Any reason why you guys are ignoring legal limit++ from a paif of 3-500ZGs for less than $300?? Some amps will do 2kW+ with these tubes for less than than the cost of a single new 3cx800. Maybe he's
/archives//html/Amps/2003-10/msg00229.html (8,730 bytes)

5. RE: [Amps] Water cooling heat exchanger approaches (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Tue, 28 Oct 2003 06:59:25 -0800 (PST)
That's called a "Heater Core". Excellent idea!! Here in the states, the same place you'd find a heater core (auto parts store), you're likely to find an oil cooler as well. Let your wallet be your gu
/archives//html/Amps/2003-10/msg00278.html (10,342 bytes)

6. Re: [Amps] 1200 vs 1500 triodes (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Wed, 29 Oct 2003 07:05:48 -0800 (PST)
Thanks for an excellent post, Dave. I've had my RF Parts branded 3-500ZGs almost a year now running AM @ 300 to 400W carrier on 40 & 75m and haven't had a single hiccup. I also run SSB & CW, on many
/archives//html/Amps/2003-10/msg00288.html (9,640 bytes)

7. Re: [Amps] Maximum tolerable SWR for dual 3-500Z amps (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Thu, 20 Nov 2003 07:05:31 -0800 (PST)
Good question. Most Amateurs today are (in my opinion) way too concerned with SWR. This undoubtedly stems from today's tranceivers using "three legged fuses" for output finals. In the begining, Amate
/archives//html/Amps/2003-11/msg00290.html (8,709 bytes)

8. Re: [Amps] 220V service for amplifier (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Tue, 2 Dec 2003 09:02:01 -0800 (PST)
Jason, The "old" standard was only three wires for dryers (two Hots and a Neutral), but I'm pretty sure that new homes have 4 wire dryer outlets now. Consider the Neutral to be ground, since they are
/archives//html/Amps/2003-12/msg00023.html (9,052 bytes)

9. RE: [Amps] 220V service for amplifier (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Thu, 4 Dec 2003 12:59:12 -0800 (PST)
Okay, okay, I misspoke. Sorry fellas!! My amplifier (and clothes dryer, for that matter) has only three wires -- two hots and a GROUND. I would assume that everyone knows that they are 180 out -- tha
/archives//html/Amps/2003-12/msg00053.html (15,199 bytes)

10. RE: [Amps] 220V service for amplifier (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Fri, 5 Dec 2003 03:38:42 -0800 (PST)
Sure, but I notice that the tuning is quite different and I don't tear up my security system, garage door opener, or phones as bad with the amp grounded. I also don't get RF into my audio gear with e
/archives//html/Amps/2003-12/msg00063.html (8,954 bytes)

11. [Amps] Re: 220v service for amps (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Fri, 5 Dec 2003 04:03:13 -0800 (PST)
Excellent explanation -- thanks!! I hope you don't mind me replying to the reflector so we can all absorb this. I remember hearing this from my brother, who as I mentioned in an earlier post is an el
/archives//html/Amps/2003-12/msg00064.html (10,267 bytes)

12. Re: [Amps] Re: 220v service for amps (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Sun, 7 Dec 2003 03:56:16 -0800 (PST)
See below... Thanks, Paul -- Yeah, I get it now. I'll look at my amp's (TL-922) schematic closer now too see what happens when it's changed between 120 and 240V service. Exactly my thought process, t
/archives//html/Amps/2003-12/msg00102.html (9,741 bytes)

13. Re: [Amps] 3-500Z plate durability (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Wed, 10 Dec 2003 06:32:13 -0800 (PST)
Well, since I seem to have started the last round, let's see what I can do here... It's normal for these types of tubes for their plates to turn cherry red. They are run 24/7 like that in the broadca
/archives//html/Amps/2003-12/msg00160.html (9,910 bytes)

14. Re: [Amps] HELP...off topic...but... (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Thu, 25 Dec 2003 07:54:09 -0800 (PST)
Try clearing the Cache & Cookies. __________________________________ Do you Yahoo!? New Yahoo! Photos - easier uploading and sharing. http://photos.yahoo.com/ ________________________________________
/archives//html/Amps/2003-12/msg00380.html (8,020 bytes)

15. Re: [Amps] Choosing a first amp (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Fri, 27 Feb 2004 07:48:43 -0800 (PST)
Hi Brad, Since no one else has replied as of yet, I thought I'd drop my $.02... There are deals to be had on SB-220s or Kenwood TL-992s. Just be careful and know what you're getting. It's easy to get
/archives//html/Amps/2004-02/msg00284.html (9,102 bytes)

16. Re: [Amps] 2 x 8877 (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Mon, 1 Mar 2004 07:40:32 -0800 (PST)
Aluminum window screen pinched between the glass frame & front panel will work nicely. In fact, I just helped a guy out with a homebrew 3-500 amp where most of the cover was made out of screen. Obvio
/archives//html/Amps/2004-03/msg00005.html (12,096 bytes)

17. Re: [Amps] Choosing a first amp (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Tue, 2 Mar 2004 07:55:50 -0800 (PST)
It's interesting that you're getting arcs on your 922s. Ever since I put in the mods, I can't remember a single arc -- ever!! And I use mine as a "tuner" on a low-band dipole for the upper bands. I r
/archives//html/Amps/2004-03/msg00019.html (8,552 bytes)

18. Re: [Amps] sb-220 tuning question - closing in (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Wed, 3 Mar 2004 05:09:43 -0800 (PST)
Dan, The plates should get red when the amp is keyed for a while. If they turn very bright orange, then be concerned. It sounds like you had the amp under-loaded, which can cause it to spit & sputter
/archives//html/Amps/2004-03/msg00030.html (9,406 bytes)

19. Re: [Amps] sb-220 tuning question - closing in (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Thu, 4 Mar 2004 06:06:34 -0800 (PST)
At least is isn't green!! __________________________________ Do you Yahoo!? Yahoo! Search - Find what you?re looking for faster http://search.yahoo.com _______________________________________________
/archives//html/Amps/2004-03/msg00043.html (8,870 bytes)

20. [Amps] Henry 3K-A (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Thu, 4 Mar 2004 06:15:22 -0800 (PST)
Funny you mention the 3K-A, Rich. I may be picking one up this weekend. Having found very little on the 'net using Google, I wonder if anyone here has any suggestions (mods, upgrades, etc). Also, wha
/archives//html/Amps/2004-03/msg00044.html (8,560 bytes)

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