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Total 42 documents matching your query.

1. Re: [Amps] Clipperton L suggestion (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Sun, 31 Oct 2010 19:09:25 -0400
I know this sounds kind of stupid but a friend of mine had the same problem you are describing. He had inadvertently hooked the input and output coax connections on the back the wrong way. This nearl
/archives//html/Amps/2010-10/msg00495.html (14,932 bytes)

2. Re: [Amps] AL-82 Blowing fuses on startup (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Sun, 14 Nov 2010 08:50:36 -0500
Hello Group. Short question: I have an AL-82 that has started to blow a fuse on start-up. It doesn't do it every time, and when the fuse is replaced the unit starts OK and runs all day w/o problems.
/archives//html/Amps/2010-11/msg00208.html (7,841 bytes)

3. Re: [Amps] Blower Source (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Sun, 14 Nov 2010 08:58:43 -0500
I agree with Carl on this one. I have a parts order with them on a weekly basis. Good parts at a good price. They do need a few more people answering the phone but other than the difficulty of gettin
/archives//html/Amps/2010-11/msg00209.html (11,241 bytes)

4. Re: [Amps] AL-82 Blowing fuses on startup (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Sun, 14 Nov 2010 18:05:03 -0500
The step-start relay being welded together only by-passes the current limiting resistor, the fuses are still inline. -- Original Message -- From: Jim W7RY To: Mitch Cox ; Gary McAdams ; amps@contesti
/archives//html/Amps/2010-11/msg00230.html (10,935 bytes)

5. Re: [Amps] AL-82 Blowing fuses on startup (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Sun, 14 Nov 2010 18:08:04 -0500
And BTW, this is a very common problem that I see at least once a month for the AL82, 1500 and 1200 amplifiers. -- Original Message -- From: Jim W7RY To: Mitch Cox ; Gary McAdams ; amps@contesting.co
/archives//html/Amps/2010-11/msg00231.html (10,913 bytes)

6. Re: [Amps] AL-82 Blowing fuses on startup (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Fri, 26 Nov 2010 21:11:56 -0500
The way to address this issue that all AL-82, 1500 and 1200's have is to remove the step-start relay that comes in the unit from the factory and build a real step-start. I have to do this on a weekly
/archives//html/Amps/2010-11/msg00502.html (12,882 bytes)

7. Re: [Amps] Amp Conversion - 3CX1500D7 (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Fri, 10 Dec 2010 10:01:14 -0500
Since Ameritron is now offering their AL-1200 with a 3CX1200Z7 I believe I would consider this tube over the 1500. I have built amps with both tubes and the Z7 has it all over the 1500. The Z is easi
/archives//html/Amps/2010-12/msg00094.html (10,653 bytes)

8. Re: [Amps] PI-L Thoughts! (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Sun, 12 Dec 2010 15:05:13 -0500
Man, would I love for Radio Kit to still be in business. -- Original Message -- From: Carl To: Ulf (SM0NOR) ; ken.d.brown@hawaiiantel.net Cc: amps@contesting.com Sent: Sunday, December 12, 2010 9:12
/archives//html/Amps/2010-12/msg00138.html (11,315 bytes)

9. [Amps] Fw: Fan for SB220 (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Sat, 18 Dec 2010 13:20:44 -0500
I have never quite understood the premise of painting the inside of an RF deck ANY color. The black paint part comes from the fact that heat generators that generate heat from the inside will radiate
/archives//html/Amps/2010-12/msg00201.html (15,822 bytes)

10. Re: [Amps] Fw: Fan for SB220 (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Sat, 18 Dec 2010 13:54:45 -0500
Not to try to be argumentative but this only proves the bare minimum of cooling that exists under the tube deck. If you doubt this, turn the fan off and see how long the solder lasts in any of the pi
/archives//html/Amps/2010-12/msg00204.html (8,806 bytes)

11. Re: [Amps] Fan for SB220 (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Sat, 18 Dec 2010 14:21:52 -0500
I think Richard's comments lean more toward reducing the reflection than heat being radiated away from the tubes by changing colors. He is saying that a flat black is the best color to break up the r
/archives//html/Amps/2010-12/msg00205.html (17,338 bytes)

12. Re: [Amps] Transworld TW-1000 amp (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Sun, 19 Dec 2010 12:21:54 -0500
There is a 15 or 30 amp fuse under a panel on the bottom of the amplifier. Have you checked to see if its blown? If it is the magnetic circuit breaker will not seem to reset. -- Original Message -- F
/archives//html/Amps/2010-12/msg00250.html (7,512 bytes)

13. Re: [Amps] Drake L4B plate voltage drop (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Sun, 26 Dec 2010 13:31:01 -0500
Ampoholics Anonymous: Anyone know the typical plate voltage drop at key-down on an L4B? Key-up voltage is 2690 and key-down is 2520, with 50 watts in. That's about a 6% drop. Later, Joe, K8MP _______
/archives//html/Amps/2010-12/msg00375.html (7,783 bytes)

14. Re: [Amps] 572Bs (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Wed, 19 Jan 2011 10:27:56 -0500
Paul, I am sure you will receive many answers to your question on this subject. I will give you an answer that pertains to my experience with 572B's. I have built many amplifiers over the years for p
/archives//html/Amps/2011-01/msg00186.html (8,991 bytes)

15. Re: [Amps] 572Bs (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Wed, 19 Jan 2011 17:48:27 -0500
I have no way of knowing where the Chinese tubes I have experienced have come from. The brands that I have tried would include; Taylor, RF Parts select, Penta (X dealer), Jet Stream and the no name w
/archives//html/Amps/2011-01/msg00189.html (12,901 bytes)

16. Re: [Amps] 572Bs (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Wed, 19 Jan 2011 18:53:48 -0500
There are thousands of the Russian tubes still on the market. I have been buying them constantly without having any trouble finding them for the past 10 years. They may not be making them as the rumo
/archives//html/Amps/2011-01/msg00193.html (17,682 bytes)

17. Re: [Amps] 572Bs (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Wed, 19 Jan 2011 18:59:59 -0500
I have ordered them. At that price if they are just close the Russian tube they will be well worth the effort. Thanks for the information. Best Regards, Mitch W4COX -- Original Message -- From: Alek
/archives//html/Amps/2011-01/msg00194.html (17,217 bytes)

18. Re: [Amps] AL-811 & 572's (score: 1)
Author: mitch cox <ww4cox@embarqmail.com>
Date: Fri, 21 Jan 2011 13:48:17 -0500 (EST)
With the air flow through an AL-811 I don't think I would push it any farther than the factory specs. You have only improved the tubes at this point, the puff of air that the factory fan is giving yo
/archives//html/Amps/2011-01/msg00218.html (8,686 bytes)

19. Re: [Amps] AL-811 & 572's (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Sat, 22 Jan 2011 07:57:31 -0500
Here you go; http://www.mgs4u.com/RF-Microwave/TriodeTubeDataCharacteristicChartbyW6LEG.pdf -- Original Message -- From: Thomas F. Giella NZ4O To: amps @ COL Sent: Saturday, January 22, 2011 7:53 AM
/archives//html/Amps/2011-01/msg00228.html (9,918 bytes)

20. Re: [Amps] AL-811 & 572's (score: 1)
Author: "Mitch Cox" <ww4cox@embarqmail.com>
Date: Sat, 22 Jan 2011 13:01:15 -0500
Im sure many of us would disagree with many of those IMD specs. The 572B is off by at least 4-5dB. Also realize that the Svetlana versions are using smaller anodes and non hardened glass. They melt d
/archives//html/Amps/2011-01/msg00234.html (12,355 bytes)

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