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Posted: **15 Oct 2022, 13:21**

PDF:

Radio-Electronics-1956-02 Tube Echo Unit.pdf: (355.61 KiB) Downloaded 60 times

Posted: **15 Oct 2022, 20:35**

A glimpse of the past when safety wasn't much of a concern in design.

Interesting in a historical perspective but the lack of a isolation transformer is a scary fail.

freestompboxes.org

Daniel M. Costigan, Build This Simple Echo Unit, in: Radio Electronics, February 1956 🇺🇸

Daniel M. Costigan, Build This Simple Echo Unit, in: Radio Electronics, February 1956 🇺🇸

Re: Daniel M. Costigan, Build This Simple Echo Unit, in: Radio Electronics, February 1956