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Old 23rd Aug 2017, 7:43 pm   #24
frankmcvey
Rest in Peace
 
Join Date: Jan 2015
Location: Cottesmore, East Midlands, UK.
Posts: 858
Default Re: Quad II classic - help with tips, valve rolling and what to look for?

Hi, Vish,

You'll be very welcome to come and visit; however, I'll be visiting family over the Bank Holiday weekend, so make it any time after Sun 27th Aug. I'll PM you my phone number.

What kind and specification of resistors are you going to use? Be aware that if you're planning using NOS Erie Type 8/9s that, unless they're the hi-stab variety, it is likely that they will also have wandered in value during their time in storage. Avoid NOS Eries unless the seller states that they're in tolerance. If you're going to use modern resistors, check their voltage rating and that the leads will be long enough if you intend to follow the wiring routing pattern used by Quad.

If you're going to replace the resistors, then work very carefully - the eyelet tags on the resistor tagboard are VERY fragile, and it doesn't take very much bending or pulling at them to snap them off at the base, turning a fairly straight-forward job into a either a tricky repair or an unsightly bodge.

Take a few photos first, and/or draw a colour-coded diagram of the resistor locations and connections, plus any wire shorting links hiding underneath. You'll be glad you did! You might also want to ident the connecting wires that you remove with a bit of masking tape or somesuch, since Mr Quad had an irritating habit of using the same-coloured wire in different places...

However tempting it might be to try to remove the original resistors intact, it will be much kinder to the tags to snip the resistors out, leaving just the tails for you to desolder and wiggle out.

I have all the kit you'll need to test the amp's performance afterwards; and yes, you do need dummy loads unless you want to deafen yourself and **** off your neighbours!

Cheers,

Frank

Last edited by frankmcvey; 23rd Aug 2017 at 7:57 pm.
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