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Dirty-South Blues Harp forum: wail on! > crystal impedance box
crystal impedance box
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141 posts
Oct 14, 2022
12:08 PM
Long time ago, I think Barbecue Bob (I'm not sure) presented a shematic of a box designed to match the impedance of crystal mics and tube amps.
Does anyone has this schematic or a clue where can I find it?

Thanks in advance

1154 posts
Oct 15, 2022
2:52 AM
That is called "buffer". You can set the impedance as high as you want.
Sorry for any misspell, english is not my first language.
412 posts
Apr 25, 2023
1:32 PM
You can download it here
146 posts
Apr 26, 2023
7:52 AM
Thank you, but I think that what I saw was a passive project, but thank you anyway

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