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Harmonic Percolator
Exact physical and electrical duplicate!
The Harmonic Percolator is a distortion pedal that was made in Milwaukee, Wisconsin
in the 1970's. It used a silicon NPN transistor and a germanium PNP
transistor in a design that passes even order harmonics while suppressing odd
order harmonics. These even order harmonics are more pleasing to the ear than
odd order harmonics.This is the original circuit,
not someone’s interpretation of it. The left slider is the input gain
or distortion control and the right one is the output control. The input is
on the left and the output is to the right when looking down on it. This is
opposite pedals of today but in its time this made sense. Left to Right - the
same way you read.
This EXACT duplicate of the
original 1970's pedal employs the same obsolete type number Germanium
transistor and same number Silicon transistor. (NPN and PNP) This silicon transistor was
potted in the originals to discourage people from reading the number on it!
Also used are the exact same type number obsolete Germanium diodes. (They are
NOT the common 1N34 or 1N60) Same type capacitors also are used. Mylar-Silver
Mica, Tantalum, and Ceramic. The slider controls are the same as in the
original. These New Old Stock parts have the original packing slip dated
February 19, 1968!
Three original pedals were
dismantled to help create this duplicate. One Percolator was totally
dismantled, all its parts removed and measured. The circuit boards were never dipped in epoxy. Only one transistor had dopping wax holding a metal ring. They were never glued to the case. (Thanks John D. Greg K. Rusty O. and Jay T.
for trusting your pedals to me!) I can imagine the trepidation of the one pedal owner that had a transistor heated up to loosen the dopping wax in order to read the number! There are no hidden parts, no mis-labeled components, nothing unusual beyond the circuit itself!
Legendary guitar-abuser Steve Albini (Big Black, Rapeman)
uses a Harmonic Percolator for some of those Guitar noises he gives birth to!
This is known to be the same circuit version he uses! At low settings the
Harmonic Percolator will give you added sustain without 'coloring' your
sound. Higher settings will give a mean distortion that performs well with
multiple notes. These duplicates are in the exact same case and finished with
a super tough powder coating in the original tan and brown style. This is a
faithful duplication of the effects pedals created by Ed Giese of Interfax Electronics in Milwaukee Wisconsin
during the 1970's. There are no hidden parts, no mis-labeled components, nothing unusual beyond the circuit itself! The term Harmonic Percolator has been trademarked.
I am happy to be able to provide a genuine product and also to protect the
name from incorrect circuit representations! It uses one NPN and one PNP transistor in an unusual circuit. (That some say can't possibly work!) Looking for a 'REAL' duplicate? This is it!
FEATURES
INCLUDE
- Same obsolete transistors and
original number Germanium diodes. (Not easy to get 1N34A or 1N60!)
- Same type capacitors. (Mylar, Silver Mica, Tantalum,
Ceramic Disk)
- Classic brown and tan powder coated
case...exact same physical style!
- Same type and value slider controls
- Better battery holder and rubber feet
- True bypass switching
- An exact piece of classic effects down to the photo duplicate circuit board!
Cost $195 each with standard $15 Global AIR shipping.
Cost $195 each with $35 Express Mail International Shipping and Insurance.
Click on this
link for an advertisement from the old INTERFAX company!
Click on this link
for a scan of the seldom seen HP-1 INFO SHEET with all specifications!
THEREMANIACS!
P.O.Box
342502
Milwaukee WI 53234
USA
(262)-363-9205
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