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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Hi Andy, thanks for the tips...... posted by thermionic addictions on September 17, 2006 at 09:31:19:
Hi ,
That should be a nice , quick project ! I have been through the hum/microphony problems before ;) If you get microphony , back off your filament voltage slightly and possibly try bubblewrap or a partially inflated bicycle inner tube underneath the pre . Adding weight can also help , damp the sides and base of the chassis with a few layers of self-adhesive roofing underlay . If it hums and all else has been checked (ultrapath cap or cathode bypass cap implented , no hum loops etc) , screen the valve . If it still hums once screened check the transformer is not making any noticeable mechanical noise . In the end you will wonder why the hell people pay $100 a time for NOS 12AX7 or Tungsol 6SN7 :)cheers
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Follow Ups
- Re: Hi Andy, thanks for the tips...... - fatbottle 10:21:39 09/17/06 (2)
- Thanks Fatbottle...... - thermionic addictions 13:08:55 09/17/06 (1)
- Re: Thanks Fatbottle...... - fatbottle 15:24:38 09/17/06 (0)
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