Vintage Synth Repair

In case you didn't know, there is an ' Echoplex ' list. It does not seem
that there are many posts, but everyonce in a while!Vintage Guitar had a
series of articals a year or so age about tape echos. They said first was
the Echophonic made in Midwest for a guy named Del ______(?).
Lynn
<><
 PS: I used to mess with a Yamaha SK-20 polysynth thru an Echoplex. It
was a fun thing.