[sdiy] Tube microphonics: 12SQ7GT & 12AV6, 6SN7GT & 6CG7/6FQ7, etc.

[anthony]

I always consider my tube questions to be on topic here because I use tube 
amps with synth gear. And I think of electric organs, whether they be 
electromechanical like Hammonds or many many tube monstrosities like 
Wurlitzers & other less complicated tube-based organs as falling under the 
the topic of synth-DIY if someone plans on recreating part of the organ or 
integrating a partially functioning organ into a modular synth system, as 
synthesizers of a sort.

One of the amps I have in the works is intended to be used with my MKS-50 as 
is another stereo amp that will be used to amplify the output of a DJ mixer 
connected to two different modular synths (yet to be finished) both equiped 
with sequencers. The synths will have their own tube reverbs and the amp 
will have 2 of its own reverbs. So that's a lot fo tube circuitry for synth 
work.

So I think a lot about tube circuitry a lot when I am building my synth 
gear. Especially since I have so many random little tube preamps that find 
synth or vocal uses.

A lot of you have proven knowledgeable about tube circuitry in the past.

I haven't been on Usenet in forever since before the web existed as such 
really. But I think the appeal that this group has still applies there I 
hope: you can almosty always depend on a few quick replies. Webpage-based 
forums not so much.

Would I have to wade through a lot of audiophile prejudices on 
rec.audio.tubes? I guess it's not called 
rec.audio.tubes.direct-heated-cathodes-only...

anthony


>> I have been thinking about tube microphonics lately and was wondering 
>> what
>> aspects of the physical parts of the tube, like length of getter 
>> supports,
>> getter position & shape, wire thickness, placement of mica supports and 
>> so
>> on.
>>
> It depends on the tube's intended use. Some circuits aren't affected by
> microphony. Not all tubes are great for audio. Plus you have to remember
> that most of the oddball types have been shuffled around for 30-50 years 
> so
> the internal structure may be compromised.
>
> A 6CG7 can be a decent low power output amp if you think outside the box a
> little. Ampeg used them as capacitive coupled reverb coil drivers.
>
> Other than that, post in usenet group rec.audio.tubes.....thats the place
> where all the "toobs" hang out. You'll get far more info there and it'll 
> be
> on topic.
>
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