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How Close is Too Close? (Physical Layout / Spacing Question)

66.108.233.195

Jim Hodgson

I'm thinking about picking up a couple of adapters (link below) to allow for the substitution of 2 X 2C22 for 6SN7. My stereo preamp and stereo power amp each take one 6SN7 per channel. The issue is that these adapters take up a bit of chassis real estate, and they'll leave the various tubes running quite close to each other. Specifically:

In the case of the preamp, a 2C22 will run quite close to a 76; and in the case of the power amp, a 2C22 will run quite close to a 5Z3. (I say "quite close" because it's all a little difficult to picture in advance, and I don't have perfect measurements. I know that the tubes won't touch, but there won't be, say, any more than the width of a finger between them either. That said, the adapters appear to be somewhat "rotatable," so maybe the situation will be better than I'm picturing it.)

So, how close is too close?

THANKS!
2C22 --> 6SN7 Adapter (Open in New Window)

Follow Ups:

They are not rotatable. - Tre' 09:47:20 04/30/17 (2)
The plug has a key way (just like any octal base) and the adapter will sit according to how the tube socket is mounted in the chassis.

The wider part of the adapter will be in line with the key way.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
- Clarification - Jim Hodgson 10:52:29 04/30/17 (1)
  Of course you're right ... but that's not what I meant by "rotatable." The seller claims that the rectangular top rotates on the base just slightly -- perhaps 30 degrees? (Hard to say from photos.) It's obviously limited by length of internal wiring. But, this "give" may be just enough to make the adapter workable in tight quarters...
  - OK, I see it now - Tre' 12:00:40 04/30/17 (0)
    The screw on top loosens and (assuming some slack in the wires from the plug) the plug can be rotated WRT the top.
    
    Sorry I missed that.
    
    You could rewire, plug to circuit board, using longer wires and get as much rotation as you need.
    
    Tre'
    Have Fun and Enjoy the Music
    "Still Working the Problem"

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