Quad 303 IEC power socket upgrade

[martin5]

I'm working on my old Quad 303. It deserves a little attention.

One problem is that awkward power connector - mine had a broken pin and soldered power leads. I've made a template for replacing it with an IEC connector. Worked really well.

Here are some pictures.

I've drawn up the panel, if anybody needs the file drop me a note.

 

[Tajzmaj]

Hi
303 is nice vintage amp. I have one.
Bulgin PX0429 3 Pin Male Socket, Quad 303, Racal 1772 | eBay
Quad303 Quad 303 pcb set for renovation/cloning V.4 | eBay
2x BULGIN 3 PIN MAINS CONNECTORS FOR QUAD 33, 303, FM3 | eBay
But of course it will be good ide to replace input connector too......
Best regards, Taj

 

[llwhtt]

Looks like you could use some new filter capacitors too!

Craig

 

[Tajzmaj]

When I restore mine 303 I find some nice caps from epcos......with bolt on terminals.....
Regards

 

[robmil]

Those filter caps have had it Better change them REALLY soon (like yesterday) as they are leaking electrolyte.


rob

 

[Tajzmaj]

At the moment I'm on vacation but can check which caps I used.....but I buy everything from farnell......
Best regards, Taj

 

[ms08]

I have three 303's two have recently bee re-built to varying degrees using DADA supplies.

 

[john_ellis]

I've bult several 303 clones but with some mods. The best was to use new epi 3055's and most of the HF roll-off capacitors could be halved. Performance improved from the standard 35 kHz with original capacitor values and RCA original transistors to over 70kHz, using ST 3055's (but I suspect ON semi would be similar) and (at least I thought so) sounded better for it.

John

 

[alfian]

I did a true esoteric renewal of 303, upgrading all except the original casing and transformer. Epcos, Elna, Wima, RIFA & SMica Caps, Bourns trim, Kiwame, Mills & Takman resistors, ON Semi 15030/31 + 15003/4, J507/510, Van Den Hul cs18/16 wiring... But, the new metric screws are not matching to the old ones!!!
Does anyone know where I can find new screws for 303 (4BA thread)?

Branko, Serbia