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Total 156 documents matching your query.

1. Re: [Amps] RF Interference (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Sat, 11 Oct 2008 11:23:48 -0500
Most of this consumer "crap" was never designed with thoughts of rfi. If it passes the emission standards (if any) for them it is good to go At least being a ham the stuff I design for my customers i
/archives//html/Amps/2008-10/msg00051.html (10,941 bytes)

2. Re: [Amps] Silicone Rubber Sheets (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Thu, 16 Oct 2008 10:14:27 -0500
Does McMaster Carr have any? K0UYA -- Original Message -- From: "Bob Maser" <bmaser@tampabay.rr.com> To: "AMPS" <amps@contesting.com> Sent: Thursday, October 16, 2008 10:02 AM Subject: [Amps] Silicon
/archives//html/Amps/2008-10/msg00074.html (7,712 bytes)

3. Re: [Amps] Heathkit Warrior High Plate Current (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Mon, 20 Oct 2008 20:31:43 -0500
Eddie I seriously doubt there is anything wrong with power supply choke from what you describe. Sound like instability in amplifier plate circuit from any number of possibilities, open connections, d
/archives//html/Amps/2008-10/msg00084.html (9,332 bytes)

4. Re: [Amps] TL-922 question... (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Mon, 20 Oct 2008 20:33:04 -0500
I may be able to repair or engineer a replacement for it from what I see in manual anyway. Only cost postage two ways to find out. Paul K0UYA -- Original Message -- From: "fraz1" <fraz1@bellsouth.net
/archives//html/Amps/2008-10/msg00085.html (7,737 bytes)

5. Re: [Amps] Amplifier Input Circuit Consultation (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Thu, 23 Oct 2008 14:18:27 -0500
Sounds fantastic to me! Of course, there is an option--use two 4-1000 in paralell, that lowers the input impedance to 50 ohms. It has been done. Paul K0UYA -- Original Message -- From: <n1wr@chesapea
/archives//html/Amps/2008-10/msg00099.html (8,932 bytes)

6. Re: [Amps] help with corona discharge (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Wed, 12 Nov 2008 19:40:46 -0600
My first big rig was pair of 833A, big ugly bottles that really put out when they were a glowin orange K0UYA -- Original Message -- From: "Gary Smith" <Gary@doctorgary.net> To: <amps@contesting.com>
/archives//html/Amps/2008-11/msg00144.html (11,635 bytes)

7. Re: [Amps] 3 phase transformers on single phase - advice pls? (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Mon, 17 Nov 2008 13:55:26 -0600
Carl Many cases you don't even need the motor in the phase converter The three phase transformer will problably work fine with just the capacitor to the wild leg which was already suggested. Especial
/archives//html/Amps/2008-11/msg00176.html (10,840 bytes)

8. Re: [Amps] Fan Dust Filter (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Wed, 3 Dec 2008 16:56:04 -0600
Bob Most electronic distributors sell fan filter media for many sizes of fans Mouser, DigiKey, are two places I'd look Or, go to graveyard of old window airconditioners. One piece of filter media wou
/archives//html/Amps/2008-12/msg00080.html (8,106 bytes)

9. Re: [Amps] Meter Face Making (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Thu, 4 Dec 2008 13:54:51 -0600
That's the way, sort of, I used to do them too. Back in "the day" I would copy them on a good office copier, white out the old lettering, make a copy of a blank scale and use dry transfer lettering t
/archives//html/Amps/2008-12/msg00092.html (9,335 bytes)

10. Re: [Amps] rx noise? (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Sat, 6 Dec 2008 11:56:37 -0600
How about from a zener diode in a bias supply. They make dandy noise generators and were the source of widband rf for the old Omega noise bridge. The current to make noise is critical, line voltage u
/archives//html/Amps/2008-12/msg00125.html (9,576 bytes)

11. [Amps] coax adapter (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Wed, 10 Dec 2008 10:18:50 -0600
Anyone have (to sell) an LC male to N female adapter or something in that direction. I need the LC male part and can go from there myself. Thanks Paul K0UYA __________________________________________
/archives//html/Amps/2008-12/msg00191.html (6,249 bytes)

12. Re: [Amps] help on a old transformer (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Sun, 28 Dec 2008 20:23:40 -0600
You can "ring it out" with ohm meter and then test at reduced voltage with a variac? That is what I would do. Paul K0UYA -- Original Message -- From: "fitter4" <fitter4@comcast.net> To: <amps@contest
/archives//html/Amps/2008-12/msg00360.html (7,870 bytes)

13. Re: [Amps] filament voltage dropping?? (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Sun, 11 Jan 2009 17:43:56 -0600
More readily available ways to get there--a small variac is ideal In secondary side you will be dealing with low resistance and more difficult to get just what you want. Paul K0UYA -- Original Messag
/archives//html/Amps/2009-01/msg00090.html (7,805 bytes)

14. Re: [Amps] plate bypass caps (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Sun, 11 Jan 2009 20:22:36 -0600
Jim Second that from here! Got some great ceramic switches from the Soviets on ebay. They have the caps too. Paul K0UYA -- Original Message -- From: "Jim W7RY" <w7ry@arrl.net> To: "Steve Flood" <kk7u
/archives//html/Amps/2009-01/msg00095.html (7,924 bytes)

15. Re: [Amps] Dumb question #37b - DC filament (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Fri, 23 Jan 2009 16:38:28 -0600
Gary Unless you use a center tap pos / pos scheme you will pull more electrons off one side of cathode than other and you may introduce hum, assuming directly heated cathode type tube. Also you are w
/archives//html/Amps/2009-01/msg00276.html (7,947 bytes)

16. Re: [Amps] Crydom relays (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Thu, 29 Jan 2009 09:29:13 -0600
No, snubbers are still a very important part of industrial designs. Also, at least in case of the solid state relays with ac control input it doesn't take much stray wiring capacitance coupling to po
/archives//html/Amps/2009-01/msg00344.html (8,192 bytes)

17. Re: [Amps] Crydom Solid State Relays (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Thu, 29 Jan 2009 09:32:07 -0600
There is the Quencharc but they are pricey. Just make your own using 630wvdc poly caps and 1/2 watt resistors. Give me a load you are working with and I can point you in right direction for calulatin
/archives//html/Amps/2009-01/msg00345.html (12,364 bytes)

18. [Amps] suppressors, snubbers, etc (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Thu, 29 Jan 2009 15:12:05 -0600
For any one interested I am sending link to two manufacturers we use. Lots of info. Be sure to look at other Okaya products like surge supressors. Paul K0UYA http://www.okaya.com/oea/categoriesView.a
/archives//html/Amps/2009-01/msg00348.html (6,568 bytes)

19. Re: [Amps] Crydom Solid State Relays (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Thu, 29 Jan 2009 11:23:47 -0600
Bob The purpose of snubbers is to keep the dv / dt generated from switching an inductive load to a value below that specified for the particular triac or scr in the switch. Nothing to do with rf--it
/archives//html/Amps/2009-01/msg00350.html (16,633 bytes)

20. Re: [Amps] SSR snubbers (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Thu, 29 Jan 2009 17:17:40 -0600
Sounds like John and I have had similar experiences along the industrial road of life. For one of our products we designed that was used in auto assembly plants had ssr input modules that would not f
/archives//html/Amps/2009-01/msg00356.html (9,628 bytes)


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