Best way to dampen a micro-vibrating Printed Circuit Board inside an amp? Thanks!

There are 'off the shelf parts' that are easily purchased, PCB Standoffs come with  Anti Vibration Designs. 

One of the designs discovered will be suitable for the role being selected for it.

A Part on a PCB that has a microphonic property that is audible can benefit, but it is better to treat  the Microphonic issues at the source of the noise, this has been known to remove the audible Microphonics.

Using the PCB anti vibration is not an issue, it would be 'belt and braces' if used in conjunction when treating a Microphonic issue. 

A question for someone to ask, who doubts PCB's pick up Vibration which can be detrimental to the Signal being generated and transferred.

Ask Audio Note why they are having PCB's produced from Panzerholz, which as a a material has the value of the intrinsic properties for Damping/Dissipation well documented.

Ask Taiko why there are components used in their Topology that are Interference Fit into a Panzerholz Periphery Ring. 

I would feel quite comfortable with the notion, both AN and Taiko are making the designs available as a result of Objective Evaluation and not the typical methodology seen on forum, which usually equates to voicing ones "Contempt Prior to Investigation"     

Some of the Best Tube Amp's are Point to Point Soldered, no Circuit Boards and a Schematic that is designed with a Topology for the shortest Signal Path achievable that does not generate noise.

Start adding components to such a Circuit and there is still be the likelihood Microphonics is able to be produced, hence  those in the know and experienced in addressing such matters are quite confident their methods for attaching a part to a chassis, has addressed the issue and is to be a component fitted with an Isolation as part of the mounting.

It is best to take on the idea, it is the Component that has a Microphonic not the Part that enables it to be added to the circuit.       

@devinplombier has made the statement:

" The question (asked more than once but not answered yet) remains, do these vibrations affect the sound quality of purely electronic audio components (say, amps or preamps as opposed to analog mechanical transports such as turntables)? "

In all my time working with TT’s and working towards a TT that is having a condition that protects the Stylus from not being in contact with the LP Modulation, where the environment the Stylus functions in is not optimised for the Interface to occur. I have never been involved in a discussion that suggests a component used in a electronic circuit is a cause for a concern and should be found and eradicated for the negative effect produced.

A component used in a electronic circuit has been made known to be responsible for a failing found in a Turntable, that has not been delivering an optimised performance.

My experiences are simplistic, End Sound being produced can be tidied up and be able to present with a increased attraction towards the sound, when audio devices are mounted on an Isolation that functions satisfactorily in the environment is is selected to be used in.

If the system user is looking for the only sound wanted to be heard, to be produced as a result of the Audio System being Operated. Where sound produced comes from an amplified electric signal tracking through a range of Circuits laid out to a certain Topology and in conjunction with Cables. What is being effected by the addition of Isolation to be referred to as a Tidied Up End Sound?

I have experienced external Isolation taken to within the Chassis and then focused on a few select Components and can only say from my having experienced the end result, discernible changes were detected and the improvement made was quite discernible.

I have not got any Objective Data to substantiate what I making known.  

The Individual who worded the following quoted description or approved the wording of the following, is with a substantial career training to be an authority and is many many years involved in R&D into Acoustics and Quality of a Produced Sound. 

There are measures described and which are also adopted to be used, that strongly suggest there is mitigation needed for the influence of local ambient energies and what is to be imparted on a selection of electronic components.    

 " The Chiara’s crossover is a masterful combination of minimalist theory and the highest quality execution. Not only is the bass-mid leg run wide open, relying entirely on the superior mechanical performance of the drive unit (and its superior mechanical termination by the cabinet) the high-pass element employs only the highest quality Mundorf / Dueland Cu Cast components, all hard-wired with highest quality silver alloy cable. The topology itself is unique, based on not just output level, but dispersion through the transition point. Once carefully hand built, the entire crossover is then “potted” in resin to protect its critical components from mechanical energy. But that’s not all. By including an EMI absorbent material in the resin, we significantly reduce RFI/EMI affects on the crossover, as well as creating an RFI sink to prevent the speaker acting as an entry point or aerial, allowing EM energy to contaminate the rest of the system. Finally, the potted crossover is coupled to its own dedicated acoustic labyrinth, thus preventing it from becoming a single resonant lump. "

@awise1961 It can be assumed substantial data is recorded?

When Temperatures are kept close to typical home temperatures, does Data have variances in the measurements collected as a result of other test parameter changes being added during the testing period?

How would variances in measurements recorded, especially Data Taken at Temperatures that are representative of a Typical Home, be described by those qualified to comment on graph tracings? 

Angela-Gilbert Yeung is interesting.

I am at present having a Pre Amp' built that shares similarities to a Yeung design, as I will Monoblock Pre Amp's which are to have switchable Channels to enable 2 x Tube Options with different options for Gain and a SS Option with a increased range for adding gain.

There are both Single Ended Inputs / Outputs and a Balanced Input / Output 

The Pre Amp' which is correct when referred to as commission built, has a Prototype SS Section already in use, which offered a Complex Internal Design for Earth Lifting, as well as a SS only Circuit which is as Transparent as can be.

When used with Valves the designer informs that it is the Valves that are only being heard, the pre is not an influence.

The Prototype Pre' was also produced with the option to add gain up to 13dB.

I have used all the options in my system and done assessments with other friends sharing a audio interest. The P'type Pre' has also been inserted into other systems.

It is so so revealing it catches one out, especially when not familiar.

So far it can be safely stated, good quality recordings are not wanted to be listened to without the pre in use once experienced.

The Valves on the final version will produce a Single Ended Pre Amp' that is solely to add two versions colour that can be tweaked to control the influences of each,  as an alternative to unadulterated transparency.

I was offered one Valve as an option that would have been very closely matching the Transparency of the SS, but that was not my objective.

Different and discernible influences were to be the goal, Tube Rolling is a favoured side hobby in Audio Equipment experiences. Additionally, I do loan owned equipment to other non owned systems on a regular basis to help others find their experiencing a produced end sound that is created to meet with their preference.  The Amp design and Tube Rolling Options will assist with others who are being investigative.