Worldwide DX Amateur Radio Forums - Ham - CB - HF - VHF - UHF

Hey folks, anyone know where to get some cheap trimmer capacitors online for AM (mediumwave) tuning? Something small and in the 10-265pf range there or abouts?

I found one place but they want $3.95 a piece for tiny ones. Was curious if someone would know where else to look (other than taking apart radios, I actually want to buy like 30 of these).

Thanks in advance.

Checkout RFParts.com, you need something like a 464 or a 465 trimmer look up on there webpage. They are like maybe $1.50 each maybe.

Hey thanks! Great site.

Question though, the pf range is a bit off on those. One I've seen specifically for AM (mediumwave) listed 10-265.

Part 464 has 45-280
Part 465 has 75-380

Are these out of range for AM tuning? I'm still learning about this stuff.

What are you building or using it for? If it is an amp, input or output?

Just standalone AM loop antennas.

The exact amount of capacitance required will depend on the inductance of the loop. If one varies then the other must vary the other way to compensate. Go with the 45-280 unit.

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Front/back ratio comes from the antenna. Forward gain comes from the wall socket.

Right on. Thanks so much.