Tried "flywheel" filter + extra LC section with Triad C40X ...

Posted by deathtube 667 on October 7, 2016 at 18:51:54

Reading drlowmu's posting about adding the LSES filter to a "flywheel" gave me the motivation to try something similar tonight for my RH84 type test/project amp.

Ended up with LCLCLC (to finals) UF4007 isolation diode + R dropper + cap//bleeder ( to driver stage) .

Filter after rectifier is:

35mH -> C (value determined by simulation) -> 2H -> 50uF -> 320mH -> 50uF -> UF4007 isolation diode + 1K R dropper -> 20uF//200K bleeder for safety.

This 3 stage LC filter to finals allowed me to trim a lot of capacitance out of the filter and get quieter operation than the 2 stage flywheel.

The AC ripple measured at the speaker posts dropped to 3mV.

The dynamic Z (JLH method) of my filter was around 300 ohms.

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Topic - Tried "flywheel" filter + extra LC section with Triad C40X ... - deathtube 667 18:51:54 10/07/16 (17)

RE: Tried "flywheel" filter + extra LC section with Triad C40X ... - Chip647 07:38:58 10/08/16 (16)

RE: converting to critical L input filters or not ... - deathtube 667 04:09:45 10/09/16 (15)

RE: converting to critical L input filters or not ... - drlowmu 09:43:51 10/10/16 (4)

RE: converting to critical L input filters or not ... - cpotl 18:53:38 10/10/16 (2)

RE: converting to critical L input filters or not ... - PakProtector 09:08:07 10/11/16 (0)

An oxymoron for sure!... - gusser 19:02:17 10/10/16 (0)

RE: sent email ... - deathtube 667 12:12:27 10/10/16 (0)

RE: converting to critical L input filters or not ... - Chip647 07:17:20 10/09/16 (9)

RE: converting to critical L input filters or not ... - Tre' 10:24:35 10/09/16 (8)

RE: peak currents not a major concern for low power SE - deathtube 667 04:10:40 10/10/16 (7)

RE: peak currents not a major concern for low power SE - Tre' 08:07:43 10/10/16 (3)

RE: good point ... - deathtube 667 09:37:42 10/10/16 (1)

RE: good point ... - Tre' 12:06:23 10/10/16 (0)

RE: peak currents not a major concern for low power SE - Triode_Kingdom 09:18:18 10/10/16 (0)

Good for you! - Chip647 06:57:42 10/10/16 (2)

RE: LOL!!! - deathtube 667 12:49:36 10/10/16 (1)

RE: LOL!!! - Chip647 15:16:58 10/10/16 (0)

Tried "flywheel" filter + extra LC section with Triad C40X ...

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