Isoclean Fuse


Recently, I purchased an Isoclean fuse for my ARC VT100 MkII. The value of the fuse for the amp from ARC, is 6.25A / slo-blo type.

When ordering the Isoclean fuse the sales person informed me that Isolclean doesn't have the exact value of 6.25, so I should go up to the next fuse value of 7A (they either had a 6A or 7A).

When I installed the new fuse, what I noticed (and I don't know if this has anything to do with the new fuse) is that the bias of the amp dropped severly (from right at 130mV, down to around 88mV). After installing the new fuse I rebiased the amp but I couldn't get the amp back to 130mV. The best I could get was around 127mV, and this was with the trim pot turned up all the way. (Please note that all biasing was done after letting the amp warm up, with no music playing, for a minimum of 30 minuetes).

Just to check, I removed the Isoclean fuse and inserted the original fuse. Now, the amp showed a bias of 145mV, which I was able to lower back to the proper 130mV setting.

My questions are:

1) Is it OK to substitute a fuse value of 7A for one that is supposed to be 6.25A?
2) Would putting the 7A fuse in the amp cause the amp's bias problem?
3) Are there any other problems that may occur by installing the wrong value fuse?

Any remarks / recommendations that you can make will be appreciated.
louisl
For the negative members responding to this posting I suggest you actually try the Isoclean Gold Fuse before you pass judgment on it's performance.

Also for everyone's information the only fuse that needs replacement is the main fuse that supplies power to your component.
Artistic, I agree I should not pass judgement until I hear them. Perhaps you would loan them out to me as a trial, if I see the improvement, I will buy them, or you will agree to take them back if I find no benifit. If you look at my system posts, you will see I am a self proclaimed tweak freak, and am not usually a na-sayer.

How is it that only the power supply fuse needs changing? My Sony SCD-1 has three interior fuses that appear to be a part of the power supply circuitry. My Plinius SA-102 has two 10 amp fuses per channel as speaker protection. I assume the signal is passed through these, it would seem logical that they are even more prone to sonic quality than the power fuse.

I hope I read this as a non-attacking, non-judgemental post, in that I would like your input. I will let others judge your motives for posting, I was assuming it was to help educate...

jd

PS I was serious about my offer to try them, please email me if you want to take me up on this.
I just applied Silver treatment to fuses in my poweramp and Monarchy DIP with nice results