|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
71.62.34.73
In Reply to: RE: Defective 300B Tubes? posted by SETdude on August 16, 2015 at 12:49:20
I took the bottom plate off to take a peek, mostly out of curiosity of the design/build, and also to check for leaking caps & burnt resistors (considering age of the amp). Everything looked good, and I was impressed with the layout & build quality, even to my untrained eye you could tell Cary did a good job building these amps. And to answer your question, the unit is stock with no modifications.
One thing I want to bring up when talking with Cary's tech is possibly having a power supply delay board installed, I'm not a tech but perhaps the tubes would fare better if they were slowly exposed to voltage during the warm-up process (see 'Power Supply Delay Action Board' under 'Transformers/ Chokes/Parts'). Not sure if it would help but maybe worth discussing.
Follow Ups:
That may already be in the circuit but you would have to ask Cary to be sure. Do you recall if the coupling caps were a dull silver tone?
It was a couple of months ago when I looked under the hood so can't be sure, but I vaguely remember them as you described but again not 100%.
Then they may be Cary's Audio 1 caps which I believe are Vitamin Q's.
Vitamin Q?
Vitamin Q's are a paper in oil capacitor. They can be very nice in the right application.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: