replace 12au7 with 5687 in border patrol pre

Tubes Asylum

Questions about tubes and gear that glows. FAQ

I have a very early border patrol preamp.

It uses a cv4068 at the moment.

According to border patrol themselves it uses 12au7.

Now i have also seem the same early model border control preamp using a 5687.

So, can i swap the 12au7/cv4068 for a 5687?

Some info on the net say same pink config, others say not, etc.

Thanks for any help.

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Topic - replace 12au7 with 5687 in border patrol pre - Philmoses 03:46:03 12/05/21 (3)

RE: replace 12au7 with 5687 in border patrol pre - thermionic addictions 03:58:14 12/05/21 (2)

RE: replace 12au7 with 5687 in border patrol pre - Philmoses 04:29:49 12/05/21 (1)

RE: replace 12au7 with 5687 in border patrol pre - Tre' 08:45:32 12/05/21 (0)

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