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Active filter board GB

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OK, here we go - shipping prices...

Potepuh, Slovenia - $13.75
F1, Canada - $5.83
icsaki, Arizona - $5.75
curryking, Taiwan - 13.75

For the international mailing the estimate was always (depends on location) but I believe we are close and I am willing to looses a dollar if it needs to be re-adjusted - I just want to get them out to you. If you want to check my prices go online www.usps.com and double check, I'm happy.

Send me a personal message and I will give you the mount and my PayPal address.

Stan
 
A couple people expressed interest in boards beyond Stan's stock. I can order more if there is enough interest.

Advanced Circuits gives me a price of ~$17.50 each at 20 pieces and $9 at 50 for AF4. remember, each board is a single high pass/low pass or bandpass filter up to 4th order and two peak/notch filters, a Linkwitz transform, a first order all pass section and a buffer that can be configured as a shelving filter.

Any takers? Please post your desired quantity. If we get to 100 pieces the price can be $5 each, IIRC.
 
these filter boards use dual opamps in DIP8 packages.
Generally we can use any opamps from +-2.5Vdc to +-21Vdc.

The PSU must suit the chosen opamps. Most would choose either +-15Vdc or +-18Vdc opamps. Thus a +-12Vdc PSU would be suitable for these higher voltage opamps.

The maximum signal that can be handled is ~ 1/3rd of the supply rail to rail voltage.
i.e. ~+-12Vdc allows upto 8Vac to pass through.
BUT !!!! take care, some opamps may be in a Q>1 circuit. The AC voltage here can be much higher than the output and/or input AC voltage.
 
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