[sdiy] CoolAudio chips

[Tom Arnold]

On Thu, Jan 04, 2007 at 12:21:55AM +0000, Seb Francis wrote:
> Quote from:
> http://www.maxonfx.com/news/lt_04.php
> 
> "The Maxon AD-9 – at least in this form – will be limited in production 
> because it uses the original Panasonic MN3205 BBD and MN3101 Clock 
> Driver IC’s that are no longer being produced (these were the same chips 
> as used in the vintage Boss, Ibanez, Maxon, and EH designs from the late 
> 70’s on). According to Maxon, the company also initially looked into 
> using the Shanghais Belling chips, but decided they were not suitable 
> enough in quality for their requirements for the AD-9 design."
> 
> But isn't the Shanghais Belling part number BL3205?

Yeah, BL3205, however when I contacted them 4 years ago ( around the time I
did the BL3208 group purchase ) they were able to make them but did not yet.

I rather doubt someone else has started up a production line to make BBDs.
I cant imagine the world market is large enough to support that, so I'm
betting these are just house branded Shanghai Belling parts...

As far as Maxon's comments...  I'm fairly certain the Ibanez AD-9 reissue
uses a *pair* of BL3208 in the normal DIP8 package not the extended BBD 8pin
package we all know and love.  Furthermore I bet they have just daisychained
the two BL3208's unstead of buffering between them which I have found is
required to adjust for offset from chip to chip.  

http://www.analogman.com/IbanezMaxonAD92.htm

So, even tho the "serious effects sites" dont care for the BL3205, I'll
reserve judgement until I have some.  I do kinda lump guitar effects junkies
in the same bucket as Audiophiles for some things...  besides also I'm not
interesting in closing some old effect,  I'm interesting in what happens
around 16k stages of BBD and if I can cheaply buy some parts to get that
chipcount down a bit, I'm all over it...

-- 
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 - Tom Arnold       -  Free Synth DIY webspace http://www.sdiy.org 
 - SynthGeek        -
 - BBD Fanatic      -  "...is it a virus, a drug, or a religion?" 
 - echo evho wjxo   -    Juanita Shrugs. "What's the difference?" 
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