Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

 
 
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Default slug-tuned coils or substitutes?

I am trying to get some slug-tuned coils. I tried 4 different
electronics stores and searched online. So far I can't find them. I
found a few online, but not at the right uH value. I need them to make
a notch filter to block out a radio station (or summat) that is
interfering with channel 2 and 4 on my TV. The schematics and complete
info are on this page:

http://www.dewtronics.com/tutorials/...ter/df222.html

The last resort would be to buy an kit online for the notch filter, but
it has lots of extra parts to make versions that I don't need. The
coils I need a

3.5 turn slug-tuned coil with aluminum core - 0.16 to 0.24 uH
5.5 turn slug-tuned coil with aluminum core - 0.06 to 0.09 uH

I can't even seem to find very many inductors of any kind that are
under 1 uH in value.
Anybody know where I can get these slug-tuned coils or what
substitution I can make? I need to be able to vary the inductance so I
can tune it to the right frequency to block out from my TV signal.
Right now I don't know exactly what exact frequency it is, just that
it's between 55 mhz and 72 mhz.

 
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