[Top] [All Lists]

Re: [Amps] MLA-2500 problem

Subject: Re: [Amps] MLA-2500 problem
From: Alek Petkovic <>
Date: Sat, 23 Aug 2014 06:46:16 +0800
List-post: <">>
R5, R6 and R7, 1 Megohm, 2 Watt, resistors, in the HV metering circuit have probably gone a bit high. Dunno if they would go so high as to give you only 800V indicated but I would check and/or change them anyway.

73, Alek

On 21/08/2014 7:02 AM, BILL KENNAMER wrote:
I have what I consider to be a strange problem with my MLA 2500.
First, I should mention that it has been in storage for several years, and it's 
obviously over 30 years old. It shows only 800V on the meter. My first thought 
is power supply, and my second thought would be old filters. But, in my past 
experiences with amp power supply failures, they are usually accompanied by a 
lot of smoke and noise, along with blown fuses.

The time delay does seem to work, as near as I can tell.

Anyone have any thoughts? Also, I'm thinking that if I replace the filters, 
maybe an increase from 150uF to 220uF or so might help voltage stability. Any 

Bill K5FUV
Amps mailing list

From sunny Binningup, Western Australia.

Family Businesses:
Petkovic Air&  Gas.
SP Electrical.
Hampers by Hand.

Amps mailing list

<Prev in Thread] Current Thread [Next in Thread>