From: Paul Harker   (harkerp@river.it.gvsu.edu)
Date: 9/12/2000 10:28 PM
Subject: Schematic Errata

Gibson mailed me a copy of an Electar Tube 30 schematic dated 8/15/98. This
looks like an "original" schematic and the one posted on MusicYo.com dated
8/1/00 appears to be a tidied-up derivative effort.

The 8/15/98 schematic is a copy of a copy, and very hard to read, but I can
determine the following differences from the version from MusicYo. The
earlier schematic appears to be more correct. 

Referencing the pdf schematic from MusicYo the eratta is as follows:

Drive Switch Circuit:
C28, C29, 30 should be .01uF (103)

LDR Circuit:
Both Caps to ground should be .01uF (103)
Cap on right is C31 (marked as C5)
Resistor labeled 220K/220K should be R13/220K

Tone Circuit:
Volume pot should have third leg to ground (duh)
C18 should be .047uF
C12 should be .01uF (very hard to make out..)

Output Section:
R6 should be Labeled R30/2W/120K
R31 is 5W
Unmarked cap near R31 is C20 22/450

Power Supply:
All diode arrows should be pointing up!
(of course anyone who knows how a bridge works can see the diodes aren't
right!)
Caps on +/-15 supply should be labled (left to right, top to bottom)
C23 C25
C24 C28

Later.. Paul