RE: 3 stage flywheel for RH project amp...

Posted by deathtube 667 on October 14, 2016 at 10:44:34

In Reply to: RE: adjusted graph ... posted by Triode_Kingdom on October 13, 2016 at 22:13:29:

This is what I have as a filter with my RH84 project amp.

3 stage LC flywheel to finals.

Add an UF4007 isolation diode + 1K ohm R dropper + C4 20uF//200K bleeder (to driver stage) for the complete filter. The spice Z vs. Hz graph looks quite different.

As a full range amp, perhaps there might be some "psychoacoustic" effect as Chip647 would suggest, but who knows?

I did see some sidebands coming up an octave or two beyond the 120Hz ripple with a different flywheel filter on my spectrum/distortion graph.

Might not even hear anything unusual if you are using bass-shy bookshelf speakers or in a multi-amp system driving some horns, so who knows?.

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Follow Ups Full Thread

Topic - critical L input filter: PSUD2 ... yes or no good? - deathtube 667 15:15:49 10/11/16 (19)

RE: critical L input filter: PSUD2 ... yes or no good? - Triode_Kingdom 20:03:23 10/11/16 (18)

RE: critical L input filter: PSUD2 ... yes or no good? - deathtube 667 20:41:28 10/11/16 (17)

Flywheels and Low DCR - Triode_Kingdom 21:43:25 10/11/16 (16)

RE: Flywheels and Low DCR - deathtube 667 08:24:34 10/12/16 (15)

RE: Flywheels and Low DCR - Triode_Kingdom 10:34:12 10/12/16 (9)

RE: is it really that awful ... maybe in spice? - deathtube 667 20:13:45 10/12/16 (6)

RE: is it really that awful ... maybe in spice? - Triode_Kingdom 22:22:40 10/12/16 (5)

RE: is it really that awful ... maybe in spice? - dave slagle 06:41:31 10/13/16 (4)

Output Z - Triode_Kingdom 08:46:20 10/13/16 (0)

RE: adjusted graph ... - deathtube 667 07:42:57 10/13/16 (2)

RE: adjusted graph ... - Triode_Kingdom 22:13:29 10/13/16 (1)

RE: 3 stage flywheel for RH project amp... - deathtube 667 10:44:34 10/14/16 (0)

HK Voltage doubler - gusser 12:43:50 10/12/16 (1)

RE: HK Voltage doubler - Triode_Kingdom 13:10:24 10/12/16 (0)

RE: Flywheels and Low DCR - drlowmu 09:12:09 10/12/16 (4)

RE: Flywheels and Low DCR - deathtube 667 11:27:12 10/12/16 (3)

Do you still test light bulbs? - gusser 12:11:59 10/12/16 (2)

RE: nope ... - deathtube 667 12:44:59 10/12/16 (1)

I stand corrected then. (nt) - gusser 12:47:30 10/12/16 (0)

Follow Ups

RE: 3 stage flywheel for RH project amp... - deathtube 667 10:44:34 10/14/16 (0)

RE: 3 stage flywheel for RH project amp...

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