Hi Magnus:
I've just placed an order for 16 different kinds of caps.
Most of them are either low leakage or low series resistance
electrolytic types but also a small number of plastic film caps. Should
be here in a few days.
Also have replacements for the tone decoder PLL ICs and the Op Amps that
drive them, but will replace the caps first and see what happens.
Have Fun,
Brooke Clarke
http://www.PRC68.com
Magnus Danielson wrote:
On 01/16/2011 11:15 PM, Poul-Henning Kamp wrote:
In message<4d336a19.40...@freenet.de>, "Dr. Frank Stellmach" writes:
High cap value Ceramics are available since years, [...]
Can you clarify one thing for me: When I studied datasheets for these
it looked like they drop 50% of their capacitance at a DC voltage
of 10-20V.
Doesn't that make them a so-so bargain for power supply bulk
capacitance ?
High dielectric "constant" comes at a high price performance wise. :)
You gain some, you loose some. Temperature performance and linearity.
It should not come as a surprise if you start to think about what
happens on the atomic/molecular level of dielectrics, it's a
combination of electrostatics and "mechanical" stress.
Cheers,
Magnus
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