Showing posts with label Guild. Show all posts
Showing posts with label Guild. Show all posts

Tuesday, November 16, 2021

GUILD: Brian May Box

The layout is for the Guild Brian May Box, which on the Guild schematic is marked as designed by Pete Cornish, but he has disputed this.

There's a massive write-up here on Fryer Guitars, including photos of inside Brian May's Pete Cornish built pedal board, and inside a pretty vintage looking Pete Cornish treble boost, which also happens to contain a buffer.  Given that Fryer rebuilt AC30's for Brian May and has a few of his own treble boosters, I think the man knows a thing or two.

Either way it's a buffered treble boost.  You can either wire this up as buffered or true bypass, whatever you prefer. 

GUILD BRIAN MAY TREBLE BOOSTER - VERO LAYOUT

GUILD BRIAN MAY TREBLE BOOSTER VERO LAYOUT




GUILD BRIAN MAY TREBLE BOOSTER - ORIGINAL SCHEMATIC

GUILD BRIAN MAY TREBLE BOOSTER - SCHEMATIC


GUILD BRIAN MAY TREBLE BOOSTER - LTSPICE

Not much to see here.








And one difference to other treble boosters from the Rangemaster family is the 10n input cap vs the standard 4.7n.   






Wednesday, September 2, 2020

GUILD: Foxey Lady, Point to Point and Vero Layouts (two knob version)

This is an early two knob Guild Foxey Lady, which is very similar to a silicon Mosrite Fuzzrite.  However it’s different to other schematics I have seen online -  

I traced this from the circuit shown below - it's easy to make out part values, excluding the pots and transistors.  I left some room for power filtering too, should be able to fit an extra cap / resistor / diode on there without any trouble.

GUILD FOXEY LADY - POINT TO POINT LAYOUT

GUILD FOXEY LADY - POINT TO POINT LAYOUT


GUILD FOXEY LADY - VERO LAYOUT

As you can see I converted the P2P layout to vero - could have been smaller, but no matter - it's still on small side of things anyway.


GUILD FOXEY LADY - VERO LAYOUT



GUILD FOXEY LADY SCHEMATIC



I traced the circuit from the photos below, taken from David Morrin's website (hope you don't mind me using them Dave).  

 I don't know what the actual pot values are - the usual suspects for a Guild Foxey Lady would be a good starting point (100k).  Dave mentions that they are dated 1968.  Not sure about the transistors either, 2N5133 or similar is a distinct possibility. 




The traced circuit is a lot brighter than the standard schematic - no surprise given the 1n cap on Q2 instead of the 3n3