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/diy/ - Do It Yourself

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>> No.1537427 [View]
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1537427

>>1537416
Wouldn't a bandpass filter with two resistors and two capacitors be good enough?
>>1537407
Yeah, but I mean for modern use.
Why did they make the old ones tuneable? Why not just make one radio for each frequency and swap out the earphones, if those were the expensive part?

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