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Total 252 documents matching your query.

1. [Amps] tetrode FS (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Wed, 30 Jul 2008 16:47:12 +0800
Chinese mil-surplus tentrodes, sockets and chimneys,especially for the manufacturers of amplifier (I have enough quantity). If you are the famous tube amplifier manufacturer,you can pay after you get
/archives//html/Amps/2008-07/msg00356.html (6,903 bytes)

2. [Amps] Chinese tubes/sockets source (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Thu, 30 Oct 2008 02:48:02 +0800
I can supply NOS Chinese tubes/sockets for the tube amplifier manufacturers. My first client,had showed their new amplifier what using Chinese tube in Dayton and Friedrichshafen. I can supply FU100 a
/archives//html/Amps/2008-10/msg00136.html (6,673 bytes)

3. [Amps] RF Choke and variable capacitor for tube amplifier (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Thu, 13 Nov 2008 06:47:22 +0800
Hi, I have plate RF chokes for sale.This is my first small part for tube amplifier.Can replace the Choke direct in AL1200,AL572 and AL811 etc.I have order special ceramic tube for this choke.Same qua
/archives//html/Amps/2008-11/msg00137.html (6,956 bytes)

4. [Amps] The quality of Chinese 811A and 572B (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Fri, 14 Nov 2008 11:20:42 +0800
Hello ,Guys! When I became a ham operator in 1992, I often heard some complaint about the quality of Chinese 811A and 572B.Yeasterday, My friend and I call the manufactorer and talk with the engineer
/archives//html/Amps/2008-11/msg00154.html (7,130 bytes)

5. Re: [Amps] Tube Advice Needed (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Tue, 30 Dec 2008 19:46:29 +0800
HI, I have some NOS 8877s in my another house, Made in China. if you want it, I can test these tubes in next week.$300,shipping add $20. 73!Hsu _______________________________________________ Amps ma
/archives//html/Amps/2008-12/msg00375.html (8,523 bytes)

6. [Amps] 4CX250B neutraliztion (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Tue, 30 Dec 2008 20:33:20 +0800
Hello Gentleman, I just built an amp what using a pair 4CX250B, it covers 1.8-54MHz ,grid driven .Working seems not too bad.I want to add more 4CX240Bs( 3 or 4X 4CX250B), for more power,but I'm afrai
/archives//html/Amps/2008-12/msg00376.html (6,489 bytes)

7. [Amps] 3CX1500A7/8877 and RF Choke FS (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Sat, 3 Jan 2009 09:51:22 +0800
I have 8 Brand new 3CX1500A7 with origional manufacturer's carton for sale, $300/ea.$2000 for all.Test OK. Made In China.The brand new RF choke same a RF Parts's" High power transmitter choke", 1.8-3
/archives//html/Amps/2009-01/msg00017.html (7,425 bytes)

8. Re: [Amps] measurement of Screen grid current (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Sun, 4 Jan 2009 09:22:49 +0800
That is not a good ider.Most of the P/O couplers are not for measurement. Please view the manual of G3SEK's tetrode board,I think you can find want you want 73!Hsu -- Original Message -- From: "Allan
/archives//html/Amps/2009-01/msg00022.html (8,153 bytes)

9. Re: [Amps] turns counter needed (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Sun, 4 Jan 2009 09:27:17 +0800
A good resource is cassette recorder's counter,although it is too small, but it usuable. Hsu -- Original Message -- From: "Steve Flood" <kk7uv@bresnan.net> To: <amps@contesting.com> Sent: Saturday, J
/archives//html/Amps/2009-01/msg00023.html (7,618 bytes)

10. Re: [Amps] 3CX1500D7 quote (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Fri, 9 Jan 2009 03:34:39 +0800
Actually some Eimac's tubes were OEM in China. Hsu -- Original Message -- From: "DAVE WHITE" <mausoptik@btinternet.com> To: "'Amps'" <amps@contesting.com>; "Peter Voelpel" <df3kv@t-online.de> Sent: T
/archives//html/Amps/2009-01/msg00067.html (15,860 bytes)

11. Re: [Amps] 3CX1500D7 quote (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Fri, 9 Jan 2009 05:49:50 +0800
Hi,Dave Maybe you are right.But maybe you don't know, No manufacturer are 100% good or bad. In same factory,some products are ver good but the others are very bad, and in another factory. maybe it is
/archives//html/Amps/2009-01/msg00074.html (18,983 bytes)

12. Re: [Amps] 3-500zs to 8877 (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Wed, 21 Jan 2009 23:32:13 +0800
3CX1500D7 is better, It use same socket as 3-500Z. Hsu -- Original Message -- From: "Val Erwin" <val.erwin@sbcglobal.net> To: <amps@contesting.com>; "Donald Fox" <taurusshoguy@yahoo.com> Sent: Wednes
/archives//html/Amps/2009-01/msg00198.html (10,531 bytes)

13. Re: [Amps] 3-500zs to 8877 (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Thu, 22 Jan 2009 01:28:52 +0800
_______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2009-01/msg00209.html (13,121 bytes)

14. Re: [Amps] Regulated DC heater (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Sun, 25 Jan 2009 06:29:11 +0800
use special transformer(CVT) 73!Hsu -- Original Message -- From: "Mark K5AM" <k5am@zianet.com> To: <amps@contesting.com> Sent: Sunday, January 25, 2009 1:30 AM Subject: [Amps] Regulated DC heater ___
/archives//html/Amps/2009-01/msg00283.html (7,734 bytes)

15. Re: [Amps] Power transformer... (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Sun, 25 Jan 2009 22:11:54 +0800
This tube was called in FU-81 and FU-80. The Fu-81 is very popular in China, it used in medical equipment now. And re-manufacture in our city from 2005 or 2006 to now. 73!Hsu -- Original Message -- F
/archives//html/Amps/2009-01/msg00289.html (13,839 bytes)

16. Re: [Amps] Glitch Resistor (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Tue, 3 Feb 2009 06:39:40 +0800
Hi, Many years past.but why not use semiconductor device to protect your tube? many modern flash light in camera with muliti-times flash funtion, I think we can use similar schematic in our HV power
/archives//html/Amps/2009-02/msg00041.html (10,568 bytes)

17. [Amps] Rohde & Schwarz NRS Power meter for sale (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Wed, 11 Feb 2009 01:53:49 +0800
I have two R&S power meters ,I just update one of them from R&S NRS to HP437,I'll sell one.It is in very good cndx,with power sensor (0-15GHz,min. and max rating(readable) is -15-+25dbm,50ohm),$400 i
/archives//html/Amps/2009-02/msg00271.html (6,610 bytes)

18. Re: [Amps] Step Start Relay (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Sat, 14 Feb 2009 06:22:18 +0800
I have discussed with M.A. Erickson,KK5DR two years ago. ,he told me that NTC can not use in step-start, It is due to the current rating limted.But I think we can get very large current rating NTC no
/archives//html/Amps/2009-02/msg00429.html (11,222 bytes)

19. Re: [Amps] Step Start Relay (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Sat, 14 Feb 2009 08:05:23 +0800
Hi, Thanks for younreply. Could you tell me the NTC's specs what you are using?how many CCS power rating of your transformer? I'm considering to using the R-Core transformer, it with good regulation
/archives//html/Amps/2009-02/msg00431.html (13,400 bytes)

20. Re: [Amps] Sunaire PS-1900A FS (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Mon, 2 Mar 2009 09:46:05 +0800
I have Sunair SC-10 Transceiver,It is My the 3rd rig since I licenced in 1995. I pay $200 for it(repairable) and repaired quickly.I run it only about few hours. I'm using it as one of backup rig now.
/archives//html/Amps/2009-03/msg00038.html (8,773 bytes)


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