[sdiy] DIP LM13700 discontinuation

[mark verbos]

Ben,

I saw the announcement of this chip on the Alfa site, but I couldn’t think of a use for it. What would one do with that? I guess replace the whole expo section (summing opamp, matched pair, temperature compensation, servo) of an existing VCO?

Mark




> On May 19, 2021, at 11:06 PM, Ben Bradley via Synth-diy <synth-diy at synth-diy.org> wrote:
> 
> At least the LM13700 is available for a while still, and from a "major distributor." If anything, this might be an opportunity to "invest" in a few to sell after they're discontinued.
> 
> I'll happily take DIP going away if it would help availability of more of these new/newly remanufactured chips. I looked on the Alfa Rpar site and saw the AS3341, essentially the exponential converter section of the AS/CEM3340 oscillator with the expo current brought out to a pin. I've got some good ideas for this, but I'd have to be able to buy it. There are boutique distributors that have some of these new and newly remade parts, but none that I've seen carrying a manufacturer's whole line. I'd email the manufacturer but I doubt I could afford the MOQ, and I'd rather not become a boutique reseller myself. I see ebay has sellers of the AS3340 and such, but not the AS3341.
> 
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