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WARBLER
CODA
VAMP
810 / 812


History

1988 Keene, NH
One day at my shop I was asked what would I build for an amp, and I siad
that I'd incorporate features from my favorite amp and call it the Warbler.

1989 Woodstock, NY
On a trip to S. Carolina I designed the first Warbler and built it up a month later.
The amp exceeded my egocentric expectations and ended my quest for the perfect amp.

1992 - 1993 Orlando, FL
Found a source of varistors and began formulating an amp strategy.
Diverted to Microphone development project.

1994 -1996 Troy, NH
Began building prototypes and custom amps for guitar which
embodied elements from the 5 major amp companies in the USA,
that changed how popular music was expressed and experienced.

1997
Standardized a production amp the Juke 1210

1998
Set up a website to sell direct to musicians as Juke Amplification.
Added the Juke 810 harp amp and the Juke 112 & 210 models.

2009
Introduced four new models with very different tonalities: the Warbler, the Coda, Vamp and Rave,


AMPS 1989-2000

G. R. Croteau

Graduate:

NH Technical Institute
Electronic Engineering
Concord, NH 1966

Institute of Audio Research
Recording Engineering
New York, NY 1973

Amps:

Tube audio hobbyist 1962-66
Tube electronic repairs since 1966
Specializing in Musical Electronics
Service and Repair since 1974
Vintage Restorations since 1988
Building Amps since 1989

Musician:

Trombone 1956-62
Harmonica 1962-Present
Vocalist 1958-Present

Amps which influenced the Warbler Design


Ampeg
Reverborocket R-12-R

Fender
5E4 Super Amp, Princeton Reverb and Vibro Champ

Gibson
Tweed Falcon and GA-30RVT

Magnatone
Troubadour 213-A, Custom 260 and MP13-A

Valco
Several Supro, Gretsch, Harmony and Airline models


Trivia


warbler
(wôr' blõr) n. music. a singer; one that warbles; to sing with
trills, quavers, or melodic embellishments


muse
(myáz) n. a source of inspiration; guiding spirit


juke
(ják) Southeastern U.S. n. musical happening; a roadhouse
with music for dancing. intr.v. To dance, especially
in a roadhouse or to the music of a jukebox
.



Miscellaneous Amp Info


Ceramic Bulk Varistors

(Rod VDR's voltage-dependent-resistors)

Fired-ceramic components consisting of silicon carbide selected and processed
for special electrical properties, and dispersed in a ceramic matrix.

Equivalent circuit is a R-C network. Specs to 10% tolorence are generally considered symmetrical
in electrical characteristics, having a maximum non-symmetry of 1%.

Varistors can not be measured by a ohmmeters or bridge resistance circuits, because they are voltage sensitive.
Specifications are derived from a calibration circuit or characteristic curves.

All Magnatone varistors fit one set of specs. The Manufacture list 23 rod types in 3 wattages
and only one matches the specs for the type found in Magnatone amps

The company that has produced this type of varistors for 60+ years,
had no knowledge of them being used in an audio application.



WARBLER
CODA
VAMP
810 / 812

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