About 5 years ago I did a design for a simple TRF receiver that used small Xicon (Mouser) tunable coils in the 50-200 nanohenry range, size
Now they've gone to a minimum of 5000 pieces per value and by my calculations that will take me well into the next century at current use rates.
Anybody got a good source for small tunable coils, preferably shielded?
Thanks,
Jim
Digikey used to carry a slew of Toko coils, but I couldn't vouch for their current availability.
If your volumes are _really_ low, you can probably still get coil forms from Amidon and roll your own. You'll have to hunt down Amidon, though
-- they've changed hands since the last time I ordered, and I always have to search around to find their site.
Easy:
Spectrum communications/Tony nailer in the UK has recently started having
10mm IFTs made in the far east, these are mainly aimed at the ham radio market but the available inductance ranges can be had in 1 off qty.
Cool. Click on "Tunable Inductors" to get to the coil forms I was talking about.
You can also get ready-wound ones from Digikey. Around a buck a pop AFAIR.
We use a bazillion of these Coilcraft ones:
---Joel
Ask for samples!
John
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