Schaller Treble-Bass Boost  [schematic]

Discussion regarding early stompbox technology: 1960-1975 Please keep discussion focused and contribute what info you have...

Schaller Treble-Bass Boost  [schematic]

Postby bluesbreaker62 » 12 Jul 2015, 12:45

Hi guys, haven’t posted here in forever. Couldn’t find a threat in this one so here goes.

Really nice booster pedal from Western Germany. 5 position rotary switch goes from spanky treble tones to fat/muddy bass.

I didn’t take any voltage reading, but I can do that if requested

If you need any more pics or info, please ask. Enjoy…


Image

Image

Image

Image

Image

Image

Image

Schematic…

Image


The 47nF cap on pole 7 to ground is a little redundant as it just switches parallel to the 100nf in position 1 (Bass1 in schematic), so you could just use 150nF there

For this message the author bluesbreaker62 has received thanks: 3
jrod (23 Jul 2015, 22:37), Manfred (12 Jul 2015, 18:39), modman (12 Jul 2015, 14:22)
bluesbreaker62
 
Posts: 18
Joined: 27 Apr 2008, 15:35
Has thanked: 11 times
Have thanks: 10 times

Re: Schaller Treble-Bass Boost

Postby vintagecharlie » 04 Mar 2017, 16:29

Thanks for sharing and the work involved! Do you have an idea what this might be based on? The Schaller fuzz seems to be a fuzz face copy. This might be inspired by other design to or is this a fairly original circuit?
vintagecharlie
Breadboard Brother
 
Posts: 58
Joined: 16 May 2010, 07:34
Has thanked: 2 times
Have thanks: 6 times

Re: Schaller Treble-Bass Boost

Postby Manfred » 14 Mar 2017, 00:59

I made a PCB layout derived from the shots and the schematic.

SchallerTrebleBassBoostLayout.JPG


Print the PDF-file using the original size setting.

schallerTrebleBassBoostPCB.pdf
You do not have the required permissions to view the files attached to this post.
Manfred
Resistor Ronker
 
Posts: 372
Joined: 05 Apr 2009, 00:42
Has thanked: 673 times
Have thanks: 268 times


Return to Vintage Stompbox Corner ( ... - 1975)

Who is online

Users browsing this forum: Fat Bob, MJC and 4 guests