Audio Asylum Thread Printer
Get a view of an entire thread on one page
|For Sale Ads|
In Reply to: RE: My experiences with new M-60 Mk.3.3s, good and not-so-good posted by jeffreybehr on April 23, 2016 at 14:28:07
I won't comment on the parts swapping. But it seems to me that I see threaded recesses in the bottom of your chassis which might accommodate the threaded male ends of audiophile "footers", if you are of a mind to do that. I wonder why feet of some sort were not included in your shipment.
I am sure you realize this, but go easy on the dampening materials lest you impede the cooling of the amplifier via heat transfer direct to the metal chassis. The cooling is not entirely dependent upon the slotted air vents.
I will send out your 6SN7 this week. Thanks.
Edits: 04/25/16Follow Ups:
Yes, I understand that the chassis surfaces help cool the amp, but I suspect the bottom cover does very little of that. Probably I'll apply very little SoundCoat to the ceiling of the chassis. Since I'll add little damping to the ceiling of the chassis, I plan to add four stainless-steel bars, probably 3/4-by-2-by-4-1/2" to be cushioned with some sort of Herbies pads, placed on edge atop the chassis, one each between the rows of output tubes and two alongside the frontend tubes. It's easy for me to visualize that, but I expect a few pictures will be worth hundreds of words.
Tin-eared audiofool, large-scale-Classical music lover, and damned-amateur fotografer.
William Bruce Cameron: "...not everything that can be counted counts, and not everything that counts can be counted."
on my first and only reading of your post, I thought you lamented the lack of "feet" and so are using your own solution to that problem.
The best, really only, way I have ever read about (but never used) to cure the "problem" (if it is a problem) of vibrating capacitors and resistors is that spray-on or paint-on compound, can't recall the name of it, that really does dampen vibrations. However, it must be a nightmare if you later want to change out parts or service the circuit. Other than that, one could use double-sided tape and other forms of goop. So what do you do?
One guru on TubeDIY actually recommended keeping capacitor and resistor leads as long as possible and coiling them up so as to allow the leads to act like a spring, in an attempt to decouple the part from the vibration of the chassis. But that leaves the part free in space to vibrate secondary to signal transfer.
Post a Followup:
Post a Message!
This post is made possible by the generous support of people like you and our sponsors: