Hello, I am new to this site and hope some of your members here can assist me.
I have been using a pair of Audio Research Classic 120 for about 18 months now. This is my first valve amp and I am delighted with the superior sound quality it has over all my previous transistor amps I have owned over the years. My last amp was a Musical Fidelity A370.
The only problem I have is, one of the amp's line fuse keeps blowing! This is a slow blow, 250 VAC, 3 amp fuse. Can anyone tell me why? Anyone have similar experiences?
The engineer has given up hope in finding the fault! It happens happens intermittently. Sometimes, it will work for a few hours or days. Sometimes, it will blow immediately after switching on! This also happens on the engineer's test bench. He could not locate the exact problem as it works at times but not the rest of the time.
The engineer has replaced the rectifiers, all 12 caps (450v/ 800uF) and 16 x 6550 tubes on both amp.
I am using this power amp with Audio Research Pre-Amp, LS-2 and the Apogee Hybrid Ribbon Speakers, Centaur Major.
Your help and advice is most appreciated. Thanks
I have been using a pair of Audio Research Classic 120 for about 18 months now. This is my first valve amp and I am delighted with the superior sound quality it has over all my previous transistor amps I have owned over the years. My last amp was a Musical Fidelity A370.
The only problem I have is, one of the amp's line fuse keeps blowing! This is a slow blow, 250 VAC, 3 amp fuse. Can anyone tell me why? Anyone have similar experiences?
The engineer has given up hope in finding the fault! It happens happens intermittently. Sometimes, it will work for a few hours or days. Sometimes, it will blow immediately after switching on! This also happens on the engineer's test bench. He could not locate the exact problem as it works at times but not the rest of the time.
The engineer has replaced the rectifiers, all 12 caps (450v/ 800uF) and 16 x 6550 tubes on both amp.
I am using this power amp with Audio Research Pre-Amp, LS-2 and the Apogee Hybrid Ribbon Speakers, Centaur Major.
Your help and advice is most appreciated. Thanks