[sdiy] SSM2164 last time buys

[Tom Wiltshire]

This is interesting, in that it's the only report I've seen of *any* significant difference between the two chips. Worth further investigation.

Thanks Oscar.

T.

On 27 Feb 2011, at 16:31, Oscar Salas wrote:

> Hello,
> 
> Regarding the SSM2164 I would like report my experience with the coolaudio v2164.
> 
> Time ago 3 quad VCAs of my system died. (They are Mike Irwin linearized  so 6 chips) I didn’t understand why. I read somewhere that the 2164 dies when the negative rail faults and forget it. Just replace them. I thought that maybe I shorted accidentally the negative rail with that result.
> More recently another quad VCA, this time with new PCB layout, also did die. Just replaced the chips and now is working.
> 
> Well, I wanted to know why. I bought a pair of original ssm2164 and I did several tests. For example, I placed in a breadboard, side by side, a V2164 and a SSM2164 without connect the negative rail for more than five minutes. Neither of both did die. 
> The only thing that I can report is that the V2164 went so much hot than the original SSM2164. I don't have a thermometer and temperatures were sensed with the finger :). The diference was very clear. The SSM2164 was hot but you could stay touching the chip. The V2164 you could not stay touching it nor one second, was really burning.
> 
> I didn’t found why the V2164 of my system died, nor if they were original SSM2164 they had died. 
> What I found was a difference within them.
> 
> Other similar experiences?
> 
> Hoping that my English is understandable :) Best regards,
> Oscar.
> 
> 
> 
> 
> 
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