Supertone Amp Video 2

30 04 2010

Supertone Video 1

27 04 2010

Supertone 2311 Circuitry Photos

31 03 2010

As you can see, a lot of the internal components need replacement.

Solar, Sangamo, Beaver and Mighty Mite caps all on display.

Supertone 2311 Tube Array

19 03 2010

This amp was made 79 years ago and the tube complement is a bit different than what is found in amps made in the 1950’s to present day.

The preamp tubes consist of a pair of 6N7 valves while the phase splitter is a 6F6GT and the output is provided by a 6F6-G tube. Rectification duties are handled by an 80 tube.

Ever seen another amp with these?

A Peek At The Backside

26 02 2010

As can be seen from the open back of the Supertone, this is actually a small combo amp.  The lack of a back panel really helps this little powerhouse disperse the sound.

The speaker is an 8 inch Jensen red label with the output transformer attached. The numbers on the speaker seem to be from an earlier dating system than most Jensens and I’m not sure of the year of manufacture.

Gloriously simple control panel featuring my favorite layout: one knob! A volume control is all I ever want with an amp anyway. Sweet little Supertone badge on the back, too.

1939 Supertone 2311 Tube Amp

5 02 2010

Prior to selling the Silvertone line of amps, Sears & Roebuck offered the lesser known Supertone brand.

This 2311 model dates from all the way back to 1939 and is the most recent addition to the dustyoldamp collection. The handle looks like it could be from 100 years ago but it is the only one on an amplifier that I have ever felt to actually fit comfortably in my hand while carrying the device.  I only wish this style of handle to be on every amp in my collection, particularly the heavier models.

The Supertone is aptly named as is sounds gorgeous.  Stay tuned to hear sound clips of this 71 year old beauty in action!

Estey T-12: Bits And Bobs Part One

23 09 2009

1967 Estey T-12 Tube Amp Photo 10

As can be seen when the chassis is pulled, there ain’t a whole lot of circuitry to the Estey-T12.

1967 Estey T-12 Tube Amp Photo 11

The choke in the foreground looks shot to hell in person but the old guffer still does it’s job at 42 without a hitch.

1967 Estey T-12 Tube Amp Photo 12

This gets us a wee bit closer to things and as can be seen from the preamp and output tube assemblies, it’s true point to point wiring between the components.

The Estey T-12: Radio Tubes?

15 09 2009

1967 Estey T-12 Tube Amp Photo 9

For once, one of my amps has the schematic still attached! It’s a bit hard to see here but it’s all drawn up very nicely and also indicates that the amp design was approved for manufacture in December, 1964.

1967 Estey T-12 Tube Amp Photo 7

The tubes aren’t the average choices for most amps and that’s something I like; it sounds great while not featuring the same old 12ax7 and el84 lineup.

1967 Estey T-12 Tube Amp Photo 8

The preamp duties are performed by a 20ez7 with a 45b5 handling the output tube chores and a 36am3a serving as the rectifier.

Not sure if this is really the case, but I’ve read that a 20ez7 is a 12ax7 with a 20 volt heater. It’s definitely an uncommo valve and shows up in few tube radio applications in the early/mid 1960’s.

The 45b5 is known as a ul84 in Europe and was used in some mid 1950’s tube radio designs.

The 36am3a is a 7 pin vale developed in 1940 that was popular in the early and mid- 60’s for tube radio sets.