General discussion area for tube amps.
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Cathode Ray
Posts: 206 Joined: Sat May 26, 2018 3:22 pm
Location: SATX
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by Cathode Ray » Thu Apr 27, 2023 1:46 am
What does the circle in this RFI filter schematic represent ?
Thanks in advance !
TUBEDUDE
Posts: 1864 Joined: Thu Jan 04, 2007 5:23 pm
Location: Mastersville
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by TUBEDUDE » Thu Apr 27, 2023 2:41 am
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.
martin manning
Posts: 14308 Joined: Sun Jul 06, 2008 12:43 am
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by martin manning » Thu Apr 27, 2023 3:14 am
It’s a common mode choke, I believe.
Cathode Ray
Posts: 206 Joined: Sat May 26, 2018 3:22 pm
Location: SATX
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by Cathode Ray » Thu Apr 27, 2023 3:26 am
Also finding it represented like this:
Stevem
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by Stevem » Thu Apr 27, 2023 10:29 am
That's a type with core trim adjustment screw.
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TUBEDUDE
Posts: 1864 Joined: Thu Jan 04, 2007 5:23 pm
Location: Mastersville
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by TUBEDUDE » Thu Apr 27, 2023 10:39 am
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.
Reeltarded
Posts: 10189 Joined: Sat Feb 14, 2009 4:38 am
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by Reeltarded » Thu Apr 27, 2023 10:49 am
Variable inductor. There are a bunch of different types.
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