Electronic Symbol Question

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Cathode Ray
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Electronic Symbol Question

Post by Cathode Ray »

What does the circle in this RFI filter schematic represent ?

Thanks in advance !

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TUBEDUDE
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Re: Electronic Symbol Question

Post by TUBEDUDE »

An iron toroid?
I'll take I don't know for a thousand Alex.
Tube junkie that aspires to become a tri-state bidirectional buss driver.
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martin manning
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Re: Electronic Symbol Question

Post by martin manning »

It’s a common mode choke, I believe.
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Cathode Ray
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Re: Electronic Symbol Question

Post by Cathode Ray »

Also finding it represented like this:

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Stevem
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Re: Electronic Symbol Question

Post by Stevem »

That's a type with core trim adjustment screw.
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TUBEDUDE
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Re: Electronic Symbol Question

Post by TUBEDUDE »

Stevem wrote: Thu Apr 27, 2023 10:29 am That's a type with core trim adjustment screw.
Like a powdered iron slug in an IF coil?
Is it to change value or balance the two lines?
I don't think I've seen one. Is it physically like an A.C. power filter with an adjustment?
Tube junkie that aspires to become a tri-state bidirectional buss driver.
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Reeltarded
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Re: Electronic Symbol Question

Post by Reeltarded »

Variable inductor. There are a bunch of different types.
Signatures have a 255 character limit that I could abuse, but I am not Cecil B. DeMille.
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