Search String: Display: Description: Sort:

Results:

References: [ +from:ad4hk2004@yahoo.com: 26 ]

Total 26 documents matching your query.

1. [Amps] power supply transformer (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Wed, 31 Jan 2007 07:21:21 -0800 (PST)
Paul, you have to have a line transformer for isolation - it is life and death - no discussion possible... Secondly, (as an old Plant Engineer) have you priced the Square D transformer... You are lik
/archives//html/Amps/2007-01/msg00342.html (6,820 bytes)

2. [Amps] From CO8LY (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Sun, 14 Sep 2008 08:00:44 -0700 (PDT)
Ed, please post the email address of your manager on this list for those who don't know how to find him... I don't have any 572 but will keep my eyes open.. cheers denny / k8do ______________________
/archives//html/Amps/2008-09/msg00126.html (6,443 bytes)

3. [Amps] AL-82 (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Tue, 16 Sep 2008 06:20:32 -0700 (PDT)
3-500's will make good power if the input circuit is correct and if the HV is adequate... The Henry 3K I had in the shack for years made 1800 watts out whilst driven by an anemic Omni 6+...  The reas
/archives//html/Amps/2008-09/msg00172.html (6,585 bytes)

4. [Amps] Henry 3K-Ultra to 8K-Ultra Conversion (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Sun, 26 Oct 2008 13:54:29 -0700 (PDT)
I have a 3K Ultra and I have  gone over the 8K... This is a big job with lots of expensive parts to replace...  And the 8K requires a bunch more drive than most folks have...  You gain what, three qu
/archives//html/Amps/2008-10/msg00118.html (6,751 bytes)

5. [Amps] Henry Repair (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Sun, 23 Nov 2008 07:20:26 -0800 (PST)
While you are in there install a fan to blow on the ballast resistors... The reason your ceramic mounts break is heat build up on the resistors where one end of the ceramic is HOT and the other end c
/archives//html/Amps/2008-11/msg00230.html (6,917 bytes)

6. [Amps] Dimished Tube Life (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Fri, 25 Sep 2009 06:42:45 -0700 (PDT)
What kills tubes in the amateur service is turning the amp OFF - period...  The absolute worst thing you can do is cycle the power... In my shack on weekends the amp is turned on on Friday night and
/archives//html/Amps/2009-09/msg00310.html (7,809 bytes)

7. [Amps] Alpha sold to RF Concepts (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Wed, 30 Sep 2009 05:24:08 -0700 (PDT)
I wish them well, I really do... And their price reductions will help their sales volume hopefully... But I see $200K a year in salaries and bennys just for the five people named in the release, whic
/archives//html/Amps/2009-09/msg00368.html (6,512 bytes)

8. [Amps] 3CX800A7 (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Fri, 2 Oct 2009 08:00:14 -0700 (PDT)
In need of one, up to three... Reply PM  ad4hk2004 at  yahoo denny / k8do _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/lis
/archives//html/Amps/2009-10/msg00021.html (6,538 bytes)

9. [Amps] 3cpx1500/a7 for sale (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Fri, 23 Oct 2009 05:26:30 -0700 (PDT)
Jan, I have a counter offer... You send me a pair and I will test them.. IF they make full power then I will send you the 200 Euros each plus shipping...  Trust is a two way street... denny / k8do __
/archives//html/Amps/2009-10/msg00305.html (6,353 bytes)

10. [Amps] Dummy Loads & Wattmeters (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Thu, 3 Dec 2009 04:57:47 -0800 (PST)
  The simplest way for a ham to accurately measure to within 5% power is to measure the RF voltage impressed across a known impedence... There are a number of ways to refine your voltage measurement
/archives//html/Amps/2009-12/msg00070.html (8,875 bytes)

11. [Amps] Advice (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Sat, 5 Dec 2009 11:54:49 -0800 (PST)
Yeah, I'll take that... Absolutely, the two tubes running at ~750 watts each will outlast by a sginificant margin (your lifetime) a single tube running at 1500 watts...  You are not beating up the ox
/archives//html/Amps/2009-12/msg00128.html (7,430 bytes)

12. [Amps] Conservation of Energy! (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Mon, 7 Dec 2009 04:48:17 -0800 (PST)
Whilst doing a search on super capacitors (just a bit of self education on a device I know little about), I came across chat groupies on the topic who believe that super capacitors provide more energ
/archives//html/Amps/2009-12/msg00187.html (6,944 bytes)

13. [Amps] 3-500z Plate voltage... (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Fri, 11 Dec 2009 05:21:04 -0800 (PST)
 If you have one arcing you have one going - probably gassy, though it could be a warped grid... A time delay will not change things... The 3-500  is used in tens of thousands of amps just like yours
/archives//html/Amps/2009-12/msg00297.html (6,654 bytes)

14. [Amps] water conductivity and hose length (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Tue, 22 Dec 2009 07:25:48 -0800 (PST)
On the 100kw amps I used to maintain, with 15kv DC on the plate,  we used 35 feet of 1" dia. non carbon (red) rubber hose...  30 gallon stainless steel cooling tank and pump with a freon cooling loop
/archives//html/Amps/2009-12/msg00522.html (7,520 bytes)

15. Re: [Amps] New HF amplifier (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Sun, 1 Aug 2010 05:01:17 -0700 (PDT)
Tapped toroids show that the designer was too cheap to do the job right... Built cheap, for the cheap! Move along folks, nothing to see here... Move along... Keep moving... denny / k8do _____________
/archives//html/Amps/2010-08/msg00000.html (6,824 bytes)

16. Re: [Amps] New HF amplifier (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Wed, 4 Aug 2010 17:21:22 -0700 (PDT)
"So you're saying Alpha, Ten-Tec, Jim W8ZR, Jerry K8RA and myself are all wrong and their designs don't or wont work?" ummmm, very short and very blunt answer, yes... Longer, more nuanced answer, tho
/archives//html/Amps/2010-08/msg00032.html (8,699 bytes)

17. [Amps] New HF amplifier (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Thu, 5 Aug 2010 07:05:29 -0700 (PDT)
Palstar bought the rights to produce the Commander line of amplifiers after the owner's health declined... They expected to be able to simply truck the inventory to their shop and resume production,
/archives//html/Amps/2010-08/msg00042.html (8,355 bytes)

18. Re: [Amps] New HF amplifier (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Thu, 5 Aug 2010 13:27:13 -0700 (PDT)
"Ah, that explains it." Explains what, Carl? That I have a Palstar explains something?! holy smokeezs I also have a Commander built HF2500DX - that I have had to resurrect a couple of times, and like
/archives//html/Amps/2010-08/msg00045.html (8,602 bytes)

19. [Amps] older 3k (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Wed, 17 Nov 2010 13:21:40 -0800 (PST)
Based on minimal information and assuming you have checked the fuses, my first suspicion is you have 3-500 tubes and the solder has melted off the filament pins... Very common with Henry 3K (I've bee
/archives//html/Amps/2010-11/msg00315.html (6,710 bytes)

20. Re: [Amps] Band switch (score: 1)
Author: Dennis OConnor <ad4hk2004@yahoo.com>
Date: Sat, 11 Dec 2010 09:47:01 -0800 (PST)
Hsu, those multi deck band switches bring hot RF carrying wires from the hi-power tank circuits, close together which is not desirable... Yes, I understand that it has been done that way from the ear
/archives//html/Amps/2010-12/msg00103.html (7,482 bytes)

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