[Amps] SSR in amp PS not working as expected

[Jim]

Agreed!
Be specially careful with RF transistors, and other specialty/high 
priced ICs and special purpose transistors.

I have ordered several on eBay and received counterfeits.


Thanks
73
Jim W7RY

On 1/9/2019 9:22 AM, Manfred Mornhinweg wrote:
> Ulf, David,
>
>> I did a google search for the Crydom CSD2525P SSR but I can't find
>> any datasheet - could it be a "special" for some particular
>> application and is incompatible with what you are trying to do?
>
> Indeed - I couldn't find a datasheet either! The closest seems to be 
> the CSW2425, which is a snubberless, zero-crossing triggering, 
> antiparallel SCR SSR. Snubberless is definitely not the right kind to 
> use here, and zero-crossing triggering also leads to more trouble than 
> advantages when controlling transformers.
>
> But that's for the CSW2425, not what you have...
>
> Ulf, maybe you got a Chinese "eBay special" devices - which means 
> fakes!  In that case nobody can tell what's really inside your little 
> black boxes. There are quite a few crooks in China re-labeling ultra 
> cheap or defective parts to look like more expensive, famous-branded 
> ones. But the practice seems to be getting less common. Lately almost 
> all parts I have ordered from China were real. Emphasis on "almost".
>
> Manfred
>
>
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