Not to take anything away from Paul's design, but if you have to buy the
box new, for three bucks more you can get a complete 10.7 MHz LPF with
BNC connectors from MiniCircuits (Model BLP-10.7+, $32.95). They also
have quite a few other useful cutoff frequencies -- 1.9 MHz, 5 MHz, 30
MHz, etc.
John
----
On 12/13/2011 9:08 AM, Robert Darlington wrote:
I just ordered the parts for this filter from Mouser Electronics. ~ $30
plus shipping including a shiny new Pomona box.
qty 2 542-78F1R0-RC RF Inductors 1.0uH 10% @ $0.18 ea
qty 2 140-50S5-271J-RC Ceramic Disc Capacitors 50V 270pF SL 5% Tol @ $0.14
ea
qty 1 140-50S5-471J-RC Ceramic Disc Capacitors 50V 470pF SL 5% Tol @ $0.11
ea
qty 1 565-3752 Test Connectors SHLD BOX BNC (M/F) @ $29.12 ea (ouch!)
That's 75 cents in parts plus the box. Once assembled I'll sweep it with
the network analyzer and report back on tweaks made to get it closer to the
simulation.
-Bob
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