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Vintage Synth Repair

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Needs some chips: 4011 and TC5501P-1

2010-09-10 by rakky

I'm about to start mucking about with a few old drum machines (DR-55s, Soundmasters and EDC). These were considered uneconomic to fix, 5 years ago. Now, a DR-55 can go for £200..

Usual problem with DR-55s is the 4011 chips pack up. Maplins are charging nearly a quid for a 4011, and I've found them to be a bit hit-or-miss. And they don't have any in stock locally. 
Anyone have a suggestion for a cheap UK supplier?

Next-up, I have at least one machine which is playing-up as if the RAM chip is duff. Unfortunately, the chip is a Toshiba TC5501P-1.
Again, any suggestions for a cheap UK supplier?

What's really annoying is that I had a tube of 4011s somewhere (5 years ago). Can I hell find them :(

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