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uA726 - a word of advice
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LeBon



Joined: Mar 23, 2015
Posts: 2
Location: USA

PostPosted: Yesterday, at 12:55 pm    Post subject:  uA726 - a word of advice Reply with quote  Mark this post and the followings unread

Hi,

For those planning to build or repair a minimoog or vintage Roland, the uA726HC integrated circuit is needed.
This part was manufactured by Fairchild and discontinued in the early 80's.

There has been around a recently reissue by an unknown manufacturer from Korea, very close to the original and carrying the "F" logo. The original had golden legs, the clone has silver legs.
The new IC is available from certain sellers on eBay and AliExpress.

To my surprise, the clone not only works, but works very well, as I could test some of them in a custom built minimoog VCO. There is another guy out there who made some tests and published it on his site.

So, this is not about if the clones are fakes or not (and they're not), but how to put your hands on them. It's not that simple as it may seem.
I got mine from hkutsource for 13 USD each, but he's no longer selling it.

An eBay seller from UK, little_diode, sold them in the past for 90 USD. There were no picture in the listing, but he sent me one and it was the Korean clone, not the original.

Polida, an eBay seller from China, sells it for 90 USD.

Glenn Nichols (webmaster@icelectdata1.com) from ICEC sells the original golden-legged 1979 uA726 for about 50 USD each.
Seems that he has many left. Rush and buy all if you can.

Aliexpress has the lowest prices, maybe as low as 5 USD per piece. However it's not a good idea to trust all those sellers. I recently bought 10 pieces for 62 USD from an AliExpress seller called global Super Electronic market, via this auction. When I opened the box, there were some capacitors instead.

So here's my advice: think twice before spending a lot of money on these ICs. Buy one first, and be sure the seller will actually ship a uA726 and not some junk. Then order more. Shipping from China/HK is usually cheap.

You can post here your own experience/advice about the matter.
You can also post here your approaches to substitute this part in a VCO.

Hope this article is helpful.
Robin


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