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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: I would like to know posted by rickmcinnis@dogwoodfabrics.com on August 25, 2014 at 14:16:24:
The octal socket requires a solder joint, and a different metal type ( pin ) to attach each element in the tube. So, a 6SL7 will have 8 extra solder joints, and dis-similar metals, whereas a dual triode 9 Pin miniature will have NONE of those extra parts.
Rick, it won't make much difference on a low or medium mu tube, but on a high mu tube, the 12AX7 having a mu of 100, used as the first stage in a two stage DC amp, it is audible on a good execution. The ultimate in clarity and pristine playback, only comes with a non-octal miniature there.
Feel free to use 12AX7s in phono stages. Excellent.
I don't quite know what Triode-Kingdom is talking about, when he claims the 12AX7 tube is non linear. I think its hard to beat a good 12AX7 in certain positions, recall using Telefunken smooth plates, etc etc ?? Of course, being sensitive, high mu, it takes a better than usual execution of the power supply, which most designers and DIYers ignore or "miss", to get the most from them.
Regards,
Jeff Medwin
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Follow Ups
- You Rick, I will tell...... - drlowmu 18:16:37 08/25/14 (0)
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