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References: [ +from:KD7QAE@ARRL.NET: 117 ]

Total 117 documents matching your query.

1. Re: [Amps] Source for.Shaft Coupler/Adapter? (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Fri, 07 Nov 2003 21:34:57 -0800
R.Measures wrote: I need to couple a 3/8" roller L tuning shaft to a1/4" shaft on a turns counter, The coupling must be RF-insulated. Does anyone know of a source? Tnx _______________________________
/archives//html/Amps/2003-11/msg00093.html (7,532 bytes)

2. Re: [Amps] Toroid Plate Transformers (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Sat, 06 Dec 2003 01:55:11 +0000
Ulveco makes a fine product. Having been a magnetics engineer for Sprague and ADC for several years, I can tell you that a toroid usually gives better regulation per unit volume than EI and C core de
/archives//html/Amps/2003-12/msg00075.html (10,832 bytes)

3. Re: [Amps] OPINIONS PLEASE (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Sat, 20 Dec 2003 01:54:37 +0000
Of course if your game is S units, this is correct. If it is uVolts, my vote, then go for the highest Pout. But, I agree with the antenna sentiment 100%. RICHARD GEORGE wrote: The real difference is
/archives//html/Amps/2003-12/msg00311.html (9,713 bytes)

4. Re: [Amps] Fw: airspaced C's (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Tue, 23 Dec 2003 21:17:15 +0000
And then run at 1/2 of what you get 'cause humidity, dust and altitude all contribute to breakdown!!! Tomm, KD7QAE R.Measures wrote: ** Ste4f -- I find out how much with a high-potential breakdown te
/archives//html/Amps/2003-12/msg00358.html (8,269 bytes)

5. Re: [Amps] Fw: airspaced C's (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Tue, 23 Dec 2003 22:11:46 +0000
GREAT hint! I think this needs to be considered in tuners as well. Both Dentron and MFJ units I have had smoked the inductor switch which was a pain to fix when a sacrificial gap could have been prov
/archives//html/Amps/2003-12/msg00362.html (9,598 bytes)

6. Re: [Amps] Transformer varnish removal (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Thu, 15 Jan 2004 05:25:11 +0000
Phil Harman wrote: As a newbie to the list apologies if this topic has been covered before. For some years I've been modifying ex PC switch mode power supplies to give 14v @ 20A for various rigs and
/archives//html/Amps/2004-01/msg00148.html (8,420 bytes)

7. [Amps] FLAT BRAID CABLE (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Wed, 12 May 2004 05:42:25 +0000
I have significant quantities of flat woven braid (1/2" flat tubular braid) to sell. 1000' spool for $250, 100' for $40.00, 50' for $25 plus shipping from 98502. Weighs approx 4 lbs per 100', spool a
/archives//html/Amps/2004-05/msg00116.html (6,302 bytes)

8. Re: [Amps] grounded-gate power MOSFET (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Wed, 19 May 2004 01:44:54 +0000
Yes, except the 15V supply is established with respect to the source. As I said, I have built the version with a bipolar on the top which was emitter switched by the FET on the bottom of the pair. W/
/archives//html/Amps/2004-05/msg00153.html (10,870 bytes)

9. [Amps] More flat braid for sale or trade (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Thu, 27 May 2004 06:29:24 +0000
All, thanks for the great response on the flat braid cable. I picked up more today so here it is again! I have significant quantities of flat woven braid (1/2" flat tubular braid) to sell. 500' spool
/archives//html/Amps/2004-05/msg00248.html (7,011 bytes)

10. [Amps] FLAT BRAID FS (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Sun, 06 Jun 2004 05:29:59 +0000
FOR SALE: 100% tinned Copper Flat Braid 9AWG equivalent 1/2" Wide Tubular construction $50 / 100' Shipped CONUS $75 / 200' $150 / 500' Shorter lengths on request @ $0.50 per foot plus $2.50 handling
/archives//html/Amps/2004-06/msg00032.html (6,798 bytes)

11. [Amps] Ground Braid, 1/2" Flat Tubular Construction (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Sat, 19 Jun 2004 11:51:28 +0000
FOR SALE: 100% tinned Copper Flat Braid 9AWG equivalent 1/2" Wide Tubular construction $50 / 100' Shipped CONUS $75 / 200' $150 / 500' Shorter lengths on request @ $0.50 per foot plus $2.50 handling
/archives//html/Amps/2004-06/msg00103.html (6,612 bytes)

12. Re: [Amps] High Temp silcone rubber sheet,was chimney material suggestion GI35b (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Sat, 23 Oct 2004 14:59:58 +0000
I believe you can get it from McMaster-Carr online. jeff millar wrote: This question reminds me. Who supplies the red high temp (silicone?) rubber sheet used in chimneys on some of the commercial amp
/archives//html/Amps/2004-10/msg00376.html (8,833 bytes)

13. Re: [Amps] High Temp silcone rubber sheet,was chimney material suggestion GI35b (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Sat, 23 Oct 2004 16:02:56 +0000
Also, go to your local Target, Wal-Mart, etc cooking department and you will find Silicone baking sheets which are approx $10 / sq ft and fairly stiff so making a chimney should be easy. Other option
/archives//html/Amps/2004-10/msg00379.html (9,805 bytes)

14. [Amps] cleaning the shack sale (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Mon, 08 Nov 2004 06:58:10 +0000
Some amp parts in the mix! **Nostalgia!!!** **Heathkit HD-1410 Electronic Keyer W/ Orig Manual $50.00** **AMP Parts** 2 National Verniers, 3" dial marked 0 - 100 $25.00 pair 2 HV ceramic couplers (1.
/archives//html/Amps/2004-11/msg00123.html (7,131 bytes)

15. Re: [Amps] cleaning the shack sale (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Tue, 09 Nov 2004 02:03:16 +0000
SOLD: National Verniers and the Tempo SWR meter ADDED: Daiwa CN-720B SWR Meter for $120 shipped CONUS Tomm Aldridge wrote: Some amp parts in the mix! **Nostalgia!!!** **Heathkit HD-1410 Electronic Ke
/archives//html/Amps/2004-11/msg00125.html (8,110 bytes)

16. [Amps] Daiwa CN-720B FS (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Sun, 14 Nov 2004 19:40:37 +0000
For Sale Daiwa CN-720B great condition, in original box, no manual. CN-720B is a 2kW cross needle SWR / Wattmeter with 3 ranges. Nice large meter for us weak eyed hams. $100 plus $10 shipping in CONU
/archives//html/Amps/2004-11/msg00205.html (6,337 bytes)

17. Soft Start, was Re: [Amps] Zero Crossing circuit (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Thu, 18 Nov 2004 01:41:59 +0000
Soft starting with a phase angle controlled TRIAC works great for capacitive input filter PS inrush limit. Designs for single and 3 phase abound on the internet. My biggest of this type was actually
/archives//html/Amps/2004-11/msg00258.html (11,779 bytes)

18. Re: Soft Start, was Re: [Amps] Zero Crossing circuit (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Thu, 18 Nov 2004 07:20:25 +0000
Also NTC surge suppressors are a good choice for low to mid power soft start. See http://www.ametherm.com/Inrush_Current/transformer_case_study.htm Tomm Aldridge wrote: Soft starting with a phase ang
/archives//html/Amps/2004-11/msg00262.html (12,663 bytes)

19. Re: [Amps] Re: Step-start calculation (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Mon, 22 Nov 2004 03:55:41 +0000
All, Transformers frequently have a gap in the core just to prevent the flux walking behavior described in the article. The reason tape wound toroid cored transformers behave so badly in this regard
/archives//html/Amps/2004-11/msg00365.html (9,977 bytes)

20. Re: [Amps] Power Transformer (score: 1)
Author: Tomm Aldridge <KD7QAE@ARRL.NET>
Date: Sat, 25 Dec 2004 02:57:22 +0000
... and what does Intel have to do with MS being targeted by hackers and spammers??? It is interesting to note that most high performance WS and servers are IA powered and that they are completely OS
/archives//html/Amps/2004-12/msg00311.html (8,523 bytes)

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