I was shopping for some reasonably priced high frequency RF transistors and found a link to some TV tuners. The oscillator in the UHF section was interesting.
The good news on the transistor is you don't have to take your TV apart to get one. You can find them on E-Bay at a reasonable price.
$2.72 for 20 here:
BF970 on E-Bay
They will combine orders into one shipment so browse the store before hitting the buy button.