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Fluctuating volume in one channel: Part II

I posted a few days ago about my left channel volume fluctuating from time to time. I got advice saying that it was most likely either the tubes in the preamp or a bad solder joint on an interconnect.

I switched the tubes in the preamp from left to right and right to left and the problem stayed the same (left channel fluctuating). Then I switched the ICs between the preamp and the amp from right to left and left to right. The problem stayed the same (left channel still fluctuating).

I did not bother switching the ICs from the cd player to the preamp because the problem remains even if I listen from a different source.

What is next in line for me to test? If you would like to see the other thread, it can be found here:
http://forum.audiogon.com/cgi-bin/fr.pl?aamps&1087439704&openusid&zzKetchup&4&5#Ketchup
Forgive me for starting another thread, but I know old threads don't always get read.
ketchup

Showing 5 responses by earnestmoney

earnestmoney
34 posts
 
I had a similar problem many years ago. The volume would fluctuate in one channel with a little static. I narrowed it down to the crossover pot in one of my speakers. I twisted the pot quickly back and forth for a couple minutes and my problem was solved. I followed up with some Radio Shack tuner cleaner.
earnestmoney
34 posts
 
Hello Ketchup. Did you get your system working properly yet? I hope you haven't had to go without music all this time.

Regards,
earnestmoney
34 posts
 
Bummer...sorry to hear that Ketchup. You surely don't need a double-whammy of FedEx or UPS shipping damage, so be Super Careful on the packaging. I know you know the original box is insufficient for safety.

I recommend you get a big 4'x8' sheet of foam insulation from Home Depot and a larger box from U-Haul. You need at least 2 inches of the sturdy foam on all 6 sides of the original box for protection from the "gorillas."

Nearly EVERYTHING HEAVY that has been shipped to me over the past couple years has arrived damaged! I'm still fuming about a vintage amp and several sheets of granite. Please forget about 3 things: The UPS Store, bubble wrap, and peanuts. Good luck!

Also, be sure to read Lester_ears "A Packing and Shipping Manifesto" in the forums.
earnestmoney
34 posts
 
Correction: bubble wrap is cool for light weight items. Styrofoam peanut factories should be terminated, IMHO.
earnestmoney
34 posts
 
Hey 914. I could rant endlessly about UPS and FedEx screw-ups as I was at their mercy to deliver $120 Million annually in aircraft engine hardware. They delayed my engine lines countless times over the years.

Bryston must indeed be a class act based on the service you received and the testimonies of many other A'goners.

Ketchup, you cracked me up with the Home Depot/U-Haul story! LOL. Had you already made the rounds prior to my post, or was their some kind of mental telepathy going on here? ;)

Based on my experience, overkill packaging is always worth the peace of mind. Classe's original box and internal packaging is probably of superb quality. However, I would offer to pay extra for double boxing.

I like Counterpoint's return policy. They require that you ship your amp in a wooden crate and they will return your amp in the same crate. They supply decent crates for $80 plus shipping.

I design and build gorilla proof crates myself, that I plan to market to A'goners. I think they are good for several shipping cycles of serious abuse. Sorry I don't have anything already built that would suit your needs.

Regards,
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