Stadium 400-T Video 3

11 01 2010




Stadium 400-T Video 2

31 12 2009




Stadium 400-T Video 1

26 12 2009




Stadium 400-T Circuitry Photos

30 11 2009

I wasn’t surprised that the Stadium amp had very little circuitry when I opened her up,  she sounds very direct and uncomplicated.

A real point to point beauty laid out intelligently and very little of the ‘rat’s nest’ jumble to deal with.

This little thing has a few wiring surprises such as the inputs going directly to the volume control before hitting any tubes or resistors.  More on that later as I plan to open up and analyze the circuitry of each amp that has been presented here to date.





Stadium 400-T Tubes And Speaker

19 11 2009

There are no markings at all on the speaker of the 400-T.  It’s an odd choice of speaker given the size of the cabinet and I have to admit to never having seen an oval shaped one in a guitar amp before. It looks like something intended for a car stereo setup but I can’t argue with the results of the sound.

The tube setup is a bit unusual as well.  The 35W4 rectifier is coupled with the 50C5 output for what looks like a the classic old radio trio but instead of the usual preamp companion of a 12AV6, we have a 12AX7! The 12AX7 provides more bite here than is generally found in amps that feature the radio tune lineup.





1958 Stadium 400-T Tube Amp

23 10 2009

1958 Stadium 400-T Tube Amp 1

A fried hard drive has canceled part two of the look at the circuitry of the Estey T-12, so we move right along.

1958 Stadium 400-T Tube Amp 2

This is a 1958 Stadium 400-T, a rare bird that is difficult to dig up documentation for, either online or in books. As can be seen from the slightly warped rear panel that adjoins the control plate, the wood on the amp is plenty thin.

1958 Stadium 400-T Tube Amp 3

I’ve never seen nobs like these and they are either plastic or perhaps bakelite. The handle and its mounting look to be straight off a piece of  late 1950’s luggage.

1958 Stadium 400-T Tube Amp 4

The brushed steel panel is somewhat like that of a vintage Fender but the lesser grade of metal doesn’t have quite the same shine. There are three inputs but it’s the middle port that provides the highest gain.





Silvertone 1470 Video 2

4 05 2009

While I wait to get the Orpheum to a location where I can turn it up louder, here’s a clip of the Silvertone 1470, all the way up.