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Total 17 documents matching your query.

1. [Amps] Shorting Sticks (score: 1): Author: R@contesting.com;Measures <r@somis.org>; Date: Sun, 24 Apr 2005 10:20:10 -0700; A 0 (zero-ohm) shorting stick can damage an amplifier since there is virtually nothing to limit peak discharge current. If a 1000-ohm or so, 100 to 225 watt resistor is added in series with the short; /archives//html/Amps/2005-04/msg00484.html (6,573 bytes)
2. Re: [Amps] Shorting Sticks (score: 1): Author: "Will Matney" <craxd1@ezwv.com>; Date: Sun, 24 Apr 2005 14:40:27 -0400; Perzactly! My reasoning on the discharger was to allow the caps to discharge through some resistance at first to limit the current, and after a short time, say 2 seconds, a dead short by a relay woul; /archives//html/Amps/2005-04/msg00487.html (8,451 bytes)
3. Re: [Amps] Shorting Sticks (score: 1): Author: John Irwin <crazytvjohn@yahoo.com>; Date: Sun, 24 Apr 2005 12:36:14 -0700 (PDT); I THINK YOU DUDES ARE MISSING THE FOREST>>>>>>>>>>> The purpose of the SHORTING STICK is to KILL THE HIGH VOLTAGE INSTEAD OF YOU! The shorting stick will only damage something is it has already faile; /archives//html/Amps/2005-04/msg00490.html (10,213 bytes)
4. Re: [Amps] Shorting Sticks (score: 1): Author: "Will Matney" <craxd1@ezwv.com>; Date: Sun, 24 Apr 2005 16:20:37 -0400; John, Your saying that a dead-short, quick discharge of a capacitor bank wont be rough on the capacitors? I think everyone knows it to discharge them for safety, but why take a chace on the capacitor; /archives//html/Amps/2005-04/msg00493.html (12,378 bytes)
5. Re: [Amps] Shorting Sticks (score: 1): Author: "Bill Coleman N2BC" <n2bc@stny.rr.com>; Date: Sun, 24 Apr 2005 16:52:56 -0400; As one that has literally come across an open 225W bleeder.... I would never trust a resistor in series with the shorting stick. If the caps are charged, something has already failed. If the caps get; /archives//html/Amps/2005-04/msg00494.html (13,003 bytes)
6. Re: [Amps] Shorting Sticks (score: 1): Author: R@contesting.com;Measures <r@somis.org>; Date: Sun, 24 Apr 2005 14:26:47 -0700; If the multimeter in a g-g amplifier is left in the grid-I position, the amplifier is unplugged, and the B+ is shorted to ground when the HV filters are still well-charged, the shunt as well as the m; /archives//html/Amps/2005-04/msg00495.html (8,090 bytes)
7. Re: [Amps] Shorting Sticks (score: 1): Author: "m.ford" <moo@midmaine.com>; Date: Sun, 24 Apr 2005 17:28:05 -0400; At my place of employment a young man followed proper procedure by applying the shorting stick to the tank circuit of an S band cross field amplifier before working on the just tested unit. For some; /archives//html/Amps/2005-04/msg00496.html (7,999 bytes)
8. Re: [Amps] Shorting Sticks (score: 1): Author: Tony King - W4ZT <amps@w4zt.com>; Date: Sun, 24 Apr 2005 17:34:50 -0400; I think you all have valid points and a simple combination of your suggestions will satisfy everyone. Place Rich's 1000 ohm resistor in the supply with one end connected to the HV supply in a positio; /archives//html/Amps/2005-04/msg00497.html (15,570 bytes)
9. Re: [Amps] Shorting Sticks (score: 1): Author: TexasRF@aol.com; Date: Sun, 24 Apr 2005 17:57:29 EDT; There was one more "gotcha!" failure mode that comes back to mind: My 2m 8877 PA hv power suplly uses two 100uf 3000v oil filled caps in series. The big power bleeder resistor had gone open as mentio; /archives//html/Amps/2005-04/msg00499.html (7,928 bytes)
10. Re: [Amps] Shorting Sticks (score: 1): Author: "Will Matney" <craxd1@ezwv.com>; Date: Sun, 24 Apr 2005 19:17:07 -0400; Exactly, That's the very reason I added a volt meter on mine with a seperate ground. I've had to hit the button 2-3 times just to kill off any residual charge. I always start at the B+ line and then; /archives//html/Amps/2005-04/msg00501.html (10,422 bytes)
11. Re: [Amps] Shorting Sticks (score: 1): Author: "Joe Subich, K4IK" <k4ik@subich.com>; Date: Sun, 24 Apr 2005 19:30:17 -0400; Amen! I remember working on a TV transmitter a few years ago ... Had a 30 KV power supply in which the B+ was grounded through a metering resistor and the B- tied to the cathode (typical for a klyst; /archives//html/Amps/2005-04/msg00502.html (9,653 bytes)
12. Re: [Amps] Shorting Sticks (score: 1): Author: R.Measures <r@somis.org>; Date: Sun, 24 Apr 2005 17:37:22 -0700; If the 1k resistor does the job, there will a noticeable spark and sound. If the resistor is open, it will arc across the opening and make yet more noise. Richard L. Measures, AG6K, 805.386.3734. www; /archives//html/Amps/2005-04/msg00506.html (18,452 bytes)
13. Re: [Amps] Shorting Sticks (score: 1): Author: R.Measures <r@somis.org>; Date: Sun, 24 Apr 2005 17:40:40 -0700; What will prevent the open from arcing? Richard L. Measures, AG6K, 805.386.3734. www.somis.org _______________________________________________ Amps mailing list Amps@contesting.com http://lists.conte; /archives//html/Amps/2005-04/msg00507.html (17,699 bytes)
14. Re: [Amps] Shorting Sticks (score: 1): Author: "Bill Coleman N2BC" <n2bc@stny.rr.com>; Date: Sun, 24 Apr 2005 21:28:41 -0400; I'm not sure what resistor you are referring to Rich. In the power supply that bit me there were two 100K 225W resistors in series across 4KV and one was open - no arcing. Examination of the open res; /archives//html/Amps/2005-04/msg00509.html (10,645 bytes)
15. Re: [Amps] Shorting Sticks (score: 1): Author: Gary Schafer <garyschafer@comcast.net>; Date: Sun, 24 Apr 2005 21:56:51 -0400; I don't know if anyone has mentioned it but you also need to be careful when shorting the cap to ground, that the ground circuit for the cap hasn't opened up. For instance the meter resistor that bil; /archives//html/Amps/2005-04/msg00510.html (13,064 bytes)
16. Re: [Amps] Shorting Sticks (score: 1): Author: G3rzp@aol.com; Date: Mon, 25 Apr 2005 01:42:17 EDT; Last thing removed Well, hopefully. Many years ago, as an apprentice, I worked in a high power tx lab. On one occasion, somebody had gone into the HV PSU cubicle (it was a cubicle - 22kV at 1.5Amps,; /archives//html/Amps/2005-04/msg00514.html (8,226 bytes)
17. Re: [Amps] Shorting Sticks (score: 1): Author: R@contesting.com;Measures <r@somis.org>; Date: Mon, 25 Apr 2005 03:05:26 -0700; The R in the stick. Perhaps it should be called a discharger-stick to more accurately describe what it does. According to my DMM, the 1k-ohm, 100w R in my discharger-stick has never opened. My guess; /archives//html/Amps/2005-04/msg00518.html (12,230 bytes)

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