Search String: Display: Description: Sort:

Results:

References: [ +from:amps@w4zt.com: 78 ]

Total 78 documents matching your query.

1. Re: [Amps] Power supply filters (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Fri, 04 Jun 2004 12:33:35 -0400
Count me in for the RF choke design... especially plate chokes! Great job! 73, Tony W4ZT At 12:22 AM 6/4/2004, Will Matney wrote: Ok, Most know I'm working on the transformer website. A few have aske
/archives//html/Amps/2004-06/msg00019.html (7,635 bytes)

2. Re: [Amps] HF and 4cx250b's (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Mon, 19 Jul 2004 08:21:41 -0400
Jerry, I've worked on many (military) 4CX250B HF amps and built VHF ones. They all worked great. I have had some leak smoke and scare the devil out of me with the "POW!" as probably anyone that's spe
/archives//html/Amps/2004-07/msg00118.html (9,075 bytes)

3. Re: [Amps] GS 35B (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Sun, 25 Jul 2004 10:36:36 -0400
Just a curious question... Why would you want to run a GS-35B on 2 meters grid driven? It's very easy to use this tube in grounded grid and also easy enough to get enough power to drive it to full ou
/archives//html/Amps/2004-07/msg00180.html (7,881 bytes)

4. Re: [Amps] RE: 4CX250B Screen Supplies (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Wed, 28 Jul 2004 23:35:47 -0400
At 02:58 PM 7/28/2004, Will Matney wrote: <snip> In a way, it would be a lot better if the power companies would have fed us square wave instead of sine wave power but as Paul Harvey says, "That's an
/archives//html/Amps/2004-07/msg00223.html (8,593 bytes)

5. Re: [Amps] 20kw Dummy load? (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Sun, 15 Aug 2004 19:23:17 -0400
Robin, What frequency do you want to use to test the amp? You said you wanted a 50 ohm, 50 MHz load. You could use 20 can style 1 KW dummy loads with a power divider made from 39 inch lengths (quarte
/archives//html/Amps/2004-08/msg00149.html (10,034 bytes)

6. [Amps] 10KW Dummy Load (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Sat, 11 Sep 2004 19:41:00 -0400
For those that want a big dummy load here's a nice one! <http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=1504&item=3839231644> 73, Tony W4ZT _______________________________________________ Amp
/archives//html/Amps/2004-09/msg00209.html (6,306 bytes)

7. Re: [Amps] Recommend supplier for aluminum sheet? (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Mon, 13 Sep 2004 10:19:51 -0400
Here's his web page: <http://home.flash.net/~k3iwk/> Tony W4ZT At 09:27 AM 9/13/2004, you wrote: That reminds me. There is a guy every year at the Dayton Hamvention that sells aluminum boxes that he
/archives//html/Amps/2004-09/msg00249.html (9,504 bytes)

8. Re: [Amps] 20kw Dummy load? (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Thu, 23 Sep 2004 14:02:29 -0400
The picture you're looking for is located here: <http://www.bext.com/_CGC/pictures/celltowerfire.jpg> and a copy of it on my web page here: <http://w4zt.com/images/celltowerfire.jpg> It was reportedl
/archives//html/Amps/2004-09/msg00429.html (10,919 bytes)

9. Re: [Amps] RE: Snipers are the scourge of Ebay] (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Wed, 20 Oct 2004 20:04:49 -0400
There is a huge difference between shill bidding and proxy or snipe bidding. The shill bid, which is strictly against Ebay rules, may be placed by someone working in concert with the seller or the se
/archives//html/Amps/2004-10/msg00341.html (10,153 bytes)

10. Re: [Amps] chimney material suggestion GI35b (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Fri, 22 Oct 2004 20:13:55 -0400
PVC will work just fine if you're blowing the air from under the chassis, around the seals and up around the tube and through the anode heat sink. It takes only a piece just over an inch long to get
/archives//html/Amps/2004-10/msg00374.html (7,706 bytes)

11. [Amps] torroid filament choke? (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Tue, 26 Oct 2004 23:44:46 -0400
Do any of you have opinions about using a torroid in a filament choke for a GS-35B G-G amp covering 160-10 meters? I am thinking that it would be much more practical than any rod type choke since the
/archives//html/Amps/2004-10/msg00432.html (6,988 bytes)

12. [Amps] toroid filament choke? (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Tue, 26 Oct 2004 23:52:30 -0400
Do any of you have opinions about using a toroid in a filament choke for a GS-35B G-G amp covering 160-10 meters? I am thinking that it would be much more practical than any rod type choke since the
/archives//html/Amps/2004-10/msg00433.html (6,615 bytes)

13. Re: [Amps] toroid filament choke? (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Wed, 27 Oct 2004 10:24:58 -0400
At 10:13 AM 10/27/2004, k7fm wrote: Will said: "You have to keep in mind the current surge there until the heater warms up. The colder the heater is, the more current it draws. I would use a conducto
/archives//html/Amps/2004-10/msg00443.html (8,853 bytes)

14. Re: [Amps] Amazing ebay auction. (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Thu, 28 Oct 2004 04:49:04 -0400
I frequently see this also. In this case, the SELLER set a starting bid higher than the new book price. Smart of the seller but not so smart of the bidders, not even the first one. Bidders just didn'
/archives//html/Amps/2004-10/msg00474.html (8,168 bytes)

15. Re: [Amps] toroid filament choke? (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Thu, 28 Oct 2004 05:33:25 -0400
First I want to thank each of you that responded with your valuable opinions on the use of the toroid to make a filament choke for the GS-35B. The overwhelming opinion is to use the toroid if you wan
/archives//html/Amps/2004-10/msg00475.html (10,333 bytes)

16. Re: [Amps] filament voltage question (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Fri, 29 Oct 2004 09:26:32 -0400
An easy solution would be to obtain one of the small variable transformers (I have a couple I bought on Ebay) and put it in the filament transformer primary so you can make the necessary minor adjust
/archives//html/Amps/2004-10/msg00504.html (10,877 bytes)

17. Re: [Amps] filament voltage question (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Fri, 29 Oct 2004 13:52:33 -0400
That's a good point Rich. In any case, a minor adjustment to the primary will bring the filament right to where you want it. I'm a firm believer in step start for filaments on expensive tubes as well
/archives//html/Amps/2004-10/msg00509.html (8,566 bytes)

18. Re: [Amps] SB-220 parasitic suppressors (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Thu, 04 Nov 2004 01:43:02 -0500
At 01:21 AM 11/4/2004, R.Measures wrote: <snip> A GS-35b has 0.12pF of anode-cathode feedback C. An 8877 has 0.10pF of it, so they have a fairly similar amount of internal feedback. Our 8877 low VHF-
/archives//html/Amps/2004-11/msg00059.html (8,102 bytes)

19. Re: [Amps] SB-220 parasitic suppressors (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Thu, 04 Nov 2004 18:47:36 -0500
At 02:47 PM 11/4/2004, Ian White, G3SEK, wrote: <snip> Neither of those responses addresses my point: if VHF amplifiers using these tubes are stable under worst-case conditions, where the input and o
/archives//html/Amps/2004-11/msg00088.html (11,478 bytes)

20. Re: [Amps] A Meeting Ground (score: 1)
Author: Tony King <amps@w4zt.com>
Date: Fri, 05 Nov 2004 22:47:57 -0500
At 10:33 PM 11/5/2004, Will Matney wrote: <snip> Well, the DC currents and RF currents are intermixed in the chassis itself. The RF current circulates through the tank circuit to the load and back to
/archives//html/Amps/2004-11/msg00116.html (10,217 bytes)

Current List: 1 - 20
Page: [1] [2] [3] [4]
This search system is powered by Namazu