first, there was the TUBE-PHASER (TM)
therefrom the TUBE-VIBE derived:
(actually a TUBE-CHORUS (TM)
with built-in TUBE-TRON (TM)
built-in 2 x 12W pure tube stereo power amp with stereo-spreading...)
(dual- aka: "Bi-" LFO with the "On-LED/Off-LED" indicator trick to Vb & to gnd...
as well as the TUBE-WAHBRATO:
at that point, a man (Ted Pierce, demo-guitarist for E-H @ Frankfurt MusikMesse 1998) comes in
and plays the Tube-Wahbrato...
...mentions he needs something like that, with batteries, for street-music...
he especially wants a subtle, cyclicly modulated Wah...
subtle? - OK, leave out 3 of the 6 tube-stages, replace (EMULATE
) the tubes with transistors,
and add an extra knob to control the resonance
next: M.M. emails he`d love to see such a pedal reduced to 3 pots so it`d fit into a BMP box... :
("Resonance" & "Dry-Wet" set to fixed values, and switched with the "Mode-selector" - that`s the reason why it`s
not so easy to stompswitch the modes)
(also, this switching arrangement calls for a large amount of high-ohm pulldown resistors, that cry for metalfilms...)
a few years later, I "googled" (in fact it was "yahoo`d", back then...) for the WORM (= 3-knob-Wahbrato)
after it was issued by E-H under that name,
and stumbled across this forum, where 3 certain forumites claimed to have the schemo of it.............
NEVER trust a schematic on the web!!!
Schemos for nuttin` and chips fer free?
later again, a combinational mod of the transistor 3-knob/3-stage mod with the original (4-)Tube-Wahbrato
led to the 2-tubed:
(which can be regarded as the legit "Tube-Worm"
[ps: can`t seem to find the `96 pic of the switchable Tube-Phaser/-Vibe pedal, that ought to be between the 2nd & 3rd pic...]