Be careful.... - Cougar - Amp/Preamp Asylum

Amp/Preamp Asylum

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Be careful....

In Reply to: Well this stinks! posted by farfetched on October 30, 2024 at 07:45:17:

about putting new fuses in without getting to the root of may have happened. The fuses blew due to something not right internally. Before replacing the fuses pop the top and do a visual inspection and try to see if anything stands out. By putting new fuses in without know what caused the original fuses to blow could do more harm to the amp.

From what I have read the amp was on when you went to bed correct? Did you do a DC Offset check before connecting the amp in the system?

BTW, did the VK-500 have any upgrades from BAT?

I know this is a huge amp with Dual mono design and has two separate power switches. You at least have one good channel to reference.

This BAT VK-500 is the amp I always wanted from the first time I heard it. I heard it with a VK-5 preamp with Vandersteen 3A speakers. This was the best sounding system I had ever heard at that time and still sticks in my head how good it sound. The amp is worth being fixed.

My Edge M8 one day blew its external fuse on the AC inlet connecter upon power up. I opened it up and did a visual inspection with a magnifying glass up close at the large main filter caps, I saw some white looking substance around where the main caps were screws were. The one PS Cap had a very small pin hole right next to the screw mount. Cap went bad due to age, replaced (Upgrade the Caps) the caps. Slowly brought the amp back up with a variac with amp meter on it, no issues and let it run for about 30 mins. It was the main PS caps that was the root cause, I later restored the amp by replacing all the caps on it with better quality higher temp caps and better resistors. It sounds way better and no issues ever since.

Victor is here on the AA and should be able to help you out what to do or to look for.

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Follow Ups Full Thread

Topic - BAT season arrives - farfetched 15:58:46 10/27/24 (15)

Well this stinks! - farfetched 07:45:17 10/30/24 (6)

Be careful.... - Cougar 23:22:24 10/30/24 (1)

RE: Be careful.... - farfetched 06:54:52 10/31/24 (0)

RE: Well this stinks! - AbeCollins 07:56:38 10/30/24 (3)

RE: Well this stinks! - Ozzy 05:48:40 10/31/24 (2)

Debatable depending on use - AbeCollins 10:54:23 10/31/24 (0)

RE: Well this stinks! - farfetched 07:00:27 10/31/24 (0)

RE: BAT season arrives - Ozzy 04:09:24 10/29/24 (1)

RE: BAT season arrives - farfetched 07:35:28 10/29/24 (0)

RE: BAT season arrives - morricab 03:22:13 10/29/24 (1)

RE: BAT season arrives - farfetched 07:53:49 10/29/24 (0)

RE: BAT season arrives - AbeCollins 19:51:40 10/27/24 (1)

plush vs analytic - farfetched 06:32:53 10/28/24 (0)

RE: BAT season arrives - jonb 18:07:17 10/27/24 (1)

BAT and Bach - farfetched 08:15:51 10/28/24 (0)

Follow Ups

Be careful.... - Cougar 23:22:24 10/30/24 (1)

RE: Be careful.... - farfetched 06:54:52 10/31/24 (0)

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