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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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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: Re: Eico HF81 shield photo, for T. Willman posted by dave slagle on April 22, 2007 at 06:01:24:
And 6/32 threaded rod to hold the copper spaced where desired. In the past I used heavy 10 gauge steel for field shields, my favorite implementation.This HF81 mod can be "lifted out" to A-B the shield's effect on the EL84s, except for the shield protecting the two EZ81 rectifier tubes from the power transformer's field. That requires use of a small wrench to remove the sheild, one nut ( not me ), but it can be done.
These steps were necessary, because the original HF81 layout is wrong, tubes too close to the iron !! It is, of course, audible.
Jeff Medwin
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Follow Ups
- Copper, .025 inch - drlowmu 06:54:08 04/22/07 (5)
- Re: Copper, .025 inch - dave slagle 15:34:47 04/22/07 (4)
- Very Interesting...... - drlowmu 18:39:32 04/22/07 (3)
- 1/4" aluminum - John Swenson 23:46:45 04/23/07 (0)
- Re: Very Interesting...... - JimL 16:06:42 04/23/07 (1)
- A combination...... - Janos 22:10:02 04/23/07 (0)
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