For  

the  

highest  

reliability  

and  

performance  

we  

can  

replace  

the  

entire  

set  

of  

resistors,  

capacitors  

and  

semiconductors  

on  

the

seven  

circuit  

boards*  

including  

our  

full  

service.

This  

is  

a  

major  

overhaul  

using  

modern  

components,  

(1%  

tolerance  

low  

noise

metal film resistors, polyester/polypropylene film capacitors, low noise, high beta transistors, and new diodes/rectifiers.

What we do:

After verifying that your 33 'parts to keep' are  in good condition (we inform you if they are not); we strip all the existing

components from the seven PCB boards.*  We then clean off the solder and flux residue and re-populate each board with

new high quality components. For example, the resistors we use are 1% metal film types. This allows the DC operating

points and gain setting components to be optimised and reduces the inherent noise.  Likewise for the capacitors and

semiconductors.

The legend light is modified to a white diffused LED circuit. This gives a pleasing clean looking legend. If you prefer the

original 'dull lamp orange' we can fit an orange led instead. 

We modify some components in value and rating to improve performance, this includes the PSU smoothing capacitors,

rectifiers, bias resistors and response tailoring components. Nothing drastic, just sensible improvements so the system still

has the smooth original sound as it was when first un-boxed.

The push button switches are individually dismantled, contacts cleaned and reassembled. A similar dismantling action is

carried out on the slider pot. If the switched volume control and tone pots are in good working order, we clean the wipers

and tracks with IPA. If not, they are replaced with modern nylon spindle controls. The edge connectors are checked for

integrity and cleaned.

Everything is then assembled back in place and the system is then checked for correct operation on. Finally a full listening

test , PAT and bench soak test is  carried out.   

As you can imagine this is a labour intensive operation but the end result makes the increased outlay very worthwhile.

Quad 33 Full Component Replacement (Q33FCR)