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Old 24th December 2011, 05:53 PM   #211
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Both will work. The blue washers are actually isolation grommets made for the purpose. Pretty cheap from grainger. The tubes are pretty well isolated. Have to hit the chassis pretty hard to get it to sound through the speakers.
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Old 24th December 2011, 06:37 PM   #212
Salas is offline Salas  Greece
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What 6V6 make are those in your pictures? Would be more microphonic if you had gain.
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Old 24th December 2011, 06:58 PM   #213
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Zenith lable. Not sure who manufactured it though.
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Old 24th December 2011, 07:04 PM   #214
Cassiel is offline Cassiel  Libya
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Sgregory I like your chassis (knobs too).

Salas isn't leaking any info out on the sub chassis. Top secret?
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Old 24th December 2011, 07:07 PM   #215
Salas is offline Salas  Greece
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Quote:
Originally Posted by SGregory View Post
Zenith lable. Not sure who manufactured it though.
Good ones. They might be Sylvania.
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Old 24th December 2011, 07:10 PM   #216
Salas is offline Salas  Greece
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Quote:
Originally Posted by Cassiel View Post
Sgregory I like your chassis (knobs too).

Salas isn't leaking any info out on the sub chassis. Top secret?
What secret? From early in the thread I recommend some form of isolation. The less microphonic on steady chassis with the gain circuit was the new Tungsol from those I checked. In CF things are easier, and Scott's combination of CF and grommets won't create trouble with any make, even the most sensitive ST bottle ones.
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Old 24th December 2011, 08:40 PM   #217
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I have nylon spacers and screws, can I use this black rubber ring (it's M3)?
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Old 24th December 2011, 09:54 PM   #218
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They look very small and stiff.... try to get some soft rubber (like the one used in the SME3009 base plate fixing screw orings)... very soft.
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Old 24th December 2011, 10:01 PM   #219
tinitus is offline tinitus  Europe
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rubber grommets

mount tubes in a just big enough alu or copper plate
use rubber grommets in its chassis mounting holes
and in your main chassis, use grommets as well

mount a small piece of soft neoprene between plates, on mounting screw
use selflocking nut

mount your trafos with anti vibration rubbers too

screws should be very carefully 'adjusted'
it really makes a big difference on how much buzzing is transferred to the chassis
with a simple wooden stick(or stetoscope) you can easily hear how much
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Old 25th December 2011, 10:21 AM   #220
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Could you post a pic & where can I buy?
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