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1. [AMPS] MLA-2500 Help (score: 1): Author: wb5apd@stc.net (Bob Dodson WB5APD EM84ak); Date: Wed, 29 Jul 1998 03:41:27 -0400; Hi Gang; Here is the story. Turned on my MLA-2500 and plate V. was 1600 volts. Found (3) shorted diodes in HV string. Replaced ALL diodes w/new ones. Turned it back on. Still 1600 Volts. Checked caps; /archives//html/Amps/1998-07/msg00199.html (8,228 bytes)
2. [AMPS] MLA-2500 Help (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Wed, 29 Jul 98 09:10:32 -0500; Someone please correct me if I am wrong, but I don't think the caps in the HV string have anything to do with setting voltage. Aren't they there along with the resistors for making sure the whole st; /archives//html/Amps/1998-07/msg00200.html (9,491 bytes)
3. [AMPS] MLA-2500 Help (score: 1): Author: grimm@lynchburg.net (Kenneth D. Grimm); Date: Wed, 29 Jul 1998 12:17:44 -0400; <some good stuff snipped> Jon has given good advice. The only other thing that occurs to me is the possibility that you lost a fuse in one leg of your 220. However, I'm sure anyone but me would have; /archives//html/Amps/1998-07/msg00201.html (8,963 bytes)
4. FW: [AMPS] MLA-2500 Help (score: 1): Author: w4eto@rmii.com (Richard W. Ehrhorn); Date: Wed, 29 Jul 1998 09:58:26 -0600; Hi Bob... One OPEN cap in the HV cap string definitely WILL reduce no-load HV - from ~1.41 x rms AC voltage (the peak value which a capacitance filter will hold to under no-load conditions) to roughl; /archives//html/Amps/1998-07/msg00202.html (9,717 bytes)
5. [AMPS] MLA-2500 Help (score: 1): Author: davek@medphys.ucl.ac.uk (Dave Kirkby); Date: Wed, 29 Jul 1998 17:35:26 +0100; With the caps okay the off-load voltage will be equal to the peak transformer volltage (less a few volts for diode drops). With no capacitance, the voltage will be a series of half-rectified sine wav; /archives//html/Amps/1998-07/msg00203.html (8,470 bytes)
6. [AMPS] MLA-2500 Help (score: 1): Author: W8AV@aol.com (W8AV@aol.com); Date: Thu, 30 Jul 1998 07:05:29 EDT; << Also, please help me understand how you can check a cap with an Ohm meter. Caps by characteristic are open circuits at DC. Do you have a capacitance function on your meter? I know some of the newe; /archives//html/Amps/1998-07/msg00205.html (8,109 bytes)
7. [AMPS] MLA-2500 Help (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Thu, 30 Jul 1998 07:45:58 +0100; Adding more capacitance can also fry transformers with the (Ipeak)^2 Steve -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@; /archives//html/Amps/1998-07/msg00209.html (7,544 bytes)
8. [AMPS] MLA-2500 Help (score: 1): Author: buddyl@wa.net (Buddy Lumpkin); Date: Sat, 31 May 1997 22:39:23 -0700; Bob, The open cap will do exactly what you ask. The voltage measured across the filter cap at the output of a full wave rectifier is about 1.414xRMS. I bet if you measure the AC voltage applied to th; /archives//html/Amps/1997-06/msg00378.html (8,580 bytes)

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