Ye Olde PA Amp

(And a Big, Loose Speaker)

I got this a long time ago when a friend decided he didn't want it. It sat in the basement and garage for years. We just hauled it out and checked it; it works fine for about 15 seconds, then this mongo resisitor in the power supply starts to smoke and hiss. I'll eventually rebuild it into a guitar amp.

Notes

This has octal sockets for plug-in input transformers . Mine has one transformer, and jumpers in the other two sockets.

There's another RCA phono jack on the chassis, inside the cage, labeled "PHONO". Strange, since it's not really accessable...

Vital Statistics

Manufacturer: David Bogen

Model: J 330 (Series H-26)

Serial number: ???

Year manufactured: ???

Controls:

• On/Off
• 4 Volume controls (1 / channel)
• Bass & Treble

Tubes:

• 1 ea 5U4G full wave rectifier
• 4 ea 6SF5 [metal tube] triode preamps
• 1 ea 6SL7GT dual triode driver/inverter
• 2 ea 6L6G output tubes

Inputs:

• 3 Male XLR lo-Z (one with a plug-in input transformer)
• 1 RCA phonograph

Outputs:

• 2/4/8/16 ohm
• 70V: 164/500 ohm

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Last updated: 26 January 2001

Copyright 1999 Miles O'Neal, Austin, TX. All rights reserved.

Miles O'Neal <roadkills.r.us@XYZZY.gmail.com> [remove the "XYZZY." to make things work!] c/o RNN / 1705 Oak Forest Dr / Round Rock, TX / 78681-1514