Tube Preamp Isolation suggestions

I still believe the old adage that you isolate your component from a less stable platform and couple it to a more stable platform. One thing that works really well is to use air to isolate components, i.e. small inner tubes. When I was in graduate school we had some very sensitive equipment that needed to be isolated from airborne and furniture-borne vibrations, and using inner tubes from wheelbarrows worked the best of anything we tried. There are now some commercial air platforms on the market.

If you have an outboard power sup. addressing it may help. on mine, the audio is affected only by addressing it, not the preamp itself. I think I could turn my pre on it's side and it'd play well still. My pre has the BDR feet as OEM eq.

I've also heard from another owner of the same pre, that those boston Acoustic footers take it up another step by adding a greater spacial value.... though I've not tried them myself.

An "oh, BTW, DIY mdf" platform under the pre itself, also helped.

the most substantial and noticeable change came by the use of tube rings from herbie's Audio Labs. ...on the signal tubes... not the output... Well, they worked for me in two different preamps. And, yes, even the cheap ones made positive changes.

A good rack or preamp stand will yield still greater improvements... and a dedicated power line is beneficial too.

Good luck.

FWIW, a bit of interesting reading on this subject can be found at Galen Carols website ( gcaudio.com ) under the reviews section. There is a comparison review of numerous footer type products rated by his perceived effectiveness and value. Independently of his opinions, I have found dh golden sound ceramic cones to be effective in fine tuning the sound of preamps. My power amp actually seems to respond more to changes in footers than either of my preamps. Looking at your system, I see you've used wood platforms and mappleshade cones in numerous instances. Have you found them to be effective or make substantive improvements?

I believe a massive stand works the best. This principle is what drives TT makers to use very substantial plinths. You can see that as the TT maker's line goes up in "quality" towards their top of the line, the plinths and overall mass-the table etc. become more and more massive. This is done to prevent the ultra sensitive low output MC carts protected from vibration. Lloyd Walker maker of the renowned Proscenium, TT, insists that not only a massive table is required but that the stand must be very massive as well.
I like the idea of a tube of gas around the whole pre-amp but think the tubes would be the culprit. If you haven't sourced them from a dealer who tests for micophophy I would test them. The tube dampers are never as good as not using a microphonic tube in the first place.