Akashic Guitar effects circuit lookup
TREBLE/BASS

Enclosure not stated · 1 knob

Revolution Deux

Hornby Skewes Selectatone T.B.2

Based on the Hornby Skewes T.B. 2 Selectatone· 2 other boards clone it

Category
Boost
Controls
Treble/Bass
Price
see vendor
Read the post at Revolution Deux Schematic image

From the vendor

Hornby Skewes' Selectatone treble and bass booster: a single OC71 germanium stage followed by a switch that chooses a 1nF treble path or a 10k/1k/100nF bass path to the output.

Schematic

The schematic is in the post. Open it at Revolution Deux. No KiCad fragment has been drawn for this circuit yet.

Parts list 14 rows

Report a wrong parse

Got parts in a drawer? See what you can build with them.

Check before you build · 1 value the reader of this schematic was not sure of
  • The input and output coupling capacitor values are drawn as '?' (unknown).
RefValueNormalizedTypeNotes
Resistors 7
R1100K100kread from the schematic by eye
R210K10kread from the schematic by eye
R310K10kcollector; read from the schematic by eye
R42.2K2.2kemitter; read from the schematic by eye
R510K10kbass path; read from the schematic by eye
R61K1kbass path; read from the schematic by eye
R7100K100koutput; read from the schematic by eye
Capacitors 5
C1??input; value not given on the drawing; read from the schematic by eye
C2100u100uemitter bypass, electrolytic; read from the schematic by eye
C3??output; value not given on the drawing; read from the schematic by eye
C41n1ntreble path; read from the schematic by eye
C5100n100nbass path; read from the schematic by eye
Transistors 1
Q1OC71OC71germanium PNP; read from the schematic by eye
Switches 1
Treble/BassSPDTSPDTselects the treble or bass path; read from the schematic by eye

Other boards based on the Hornby Skewes T.B. 2 Selectatone