Poking around inside high-voltage amps or tuners
can be dangerous, fun, corrective, damaging, rewarding, creative, and
To make your vintage H.H. Scott amp, preamp, tuner, or receiver perform as it
was originally designed to, avoid modifications unless they are absolutely
required to replace an obsolete and unavailable part. Resist adding additional switches, controls, or indicators that will
devalue the originality of the vintage H.H. Scott designs. Usually, modifications by
"so-called" experts can be costly and seriously de-value vintage hi-fi
Personally, I believe in using this equipment on a daily
basis. A lot of the vintage H.H. Scott gear was originally sold without
cabinets, for custom installation. The factory-original (optional) cabinets came
in two types: "leatherette"-covered metal and genuine wood. One
modification, that will enhance your equipment is the addition of a custom
Generally, speaking vintage H. H. Scott products were conservatively designed
and use quality sub-components, but any product that is 40+ years old can and
will have certain sub-components that are extremely likely to fail or degrade.
Use the following pages as a handy guide to your restoration. The ideas and
procedures outlined in this guide have been gathered and shared in the Vintage
H.H. Scott Hi-FI Web Forum, by other vintage H.H. Scott enthusiasts, so they
are not simply the editor's opinions.
All vacuum tube devices contain lethal voltages; certain components can store
lethal electrical charges for days. Before you attempt to look around inside any
amp, tuner, or receiver; read
this! A lot of the information this publication has an equal
potential for good and evil.
The material within this publication is offered only as
a guide. In time, and with practice your troubleshooting and restoration skills
will develop. In the meantime, heed the advice of an old carpenter:
"Measure twice and cut once." You should
not be afraid to try something, but always understand what it means to cut a
hole or wield a soldering iron. If you are "newbie" or an experienced
"filament-head" just wanting a refresher on sound
troubleshooting techniques, may we suggest you read Samuel M. Goldwasser's excellent
and Repair of Consumer Electronic Equipment
The restoration and troubleshooting of vintage H.H. Scott gear can be
a time-consuming, slow process. If you can't solve a problem, take a break or
post a message on the Vintage H.H. Scott Hi-FI Listserv.
Chances are someone else has seen the same symptom and can offer their
solutions. If you do not feel at ease performing your own restoration or
maintenance, the information here will at the very least make you a more informed and
Is it worth it? If you are still skeptical, may we suggest you
Cool Sound of Tubes," By Eric Barbour, as published in the IEEE
Spectrum, August 1998 edition.
Vintage hi-fi is not for everyone, but you owe it to yourself
to at least give vintage tubes a critical listen. There's something
very satisfying about restoring, preserving, and listening to a quality piece of
vintage hi-fi history.