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Preamp mods
#10
Hi Guys

Strelok: Seems I missed your message for a while - oops!

I like Baxandall EQs and use them in my amps. The control interaction is minimised and you can add a middle pot in a couple of different ways.

When there is only a single tone control, it can be implemented several ways. Yes, it could be half of a Bax - just pick if you want to control lows or highs. It will be passive and the net result is the same, skewing the response to be "bright' or "boomy".

You can also strap a control between the outputs of a low-pass filter and a high-pass filter, as Electroharmonix did for their "tilt" control. It works well. I believe Duncan's EQ sim has that.

You can also just wire a tone stack but use fixed values for the bass and mid positions - very common. Or go even simpler as in the earliest amps and in guitars, with just a cap and pot to dump treble to ground.

Galejt: LP-PRE just has the mute connection blocks for channel switching.

Considering the tightness of the component spacing, it would be best to add a second board to mount the switched components on, maybe as an eyelet board, or whatever makes changing the optioned part for a different value.This way allows you to separate the final switch means from the experimental switch means, and from the experimental phase itself.

Have fun
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Messages In This Thread
Preamp mods - by K O'Connor - 08-22-2018, 04:25 PM
RE: Preamp mods - by Vostre Roy - 11-14-2018, 09:16 PM
RE: Preamp mods - by K O'Connor - 11-14-2018, 10:31 PM
RE: Preamp mods - by Vostre Roy - 11-17-2018, 03:01 PM
RE: Preamp mods - by Strelok - 04-16-2021, 06:54 AM
RE: Preamp mods - by K O'Connor - 04-16-2021, 08:07 PM
RE: Preamp mods - by makinrose - 04-17-2021, 12:47 PM
RE: Preamp mods - by Strelok - 04-20-2021, 11:32 AM
RE: Preamp mods - by galejt - 01-24-2022, 08:23 PM
RE: Preamp mods - by K O'Connor - 01-24-2022, 09:15 PM
RE: Preamp mods - by Strelok - 03-09-2022, 08:37 AM
RE: Preamp mods - by K O'Connor - 03-09-2022, 12:55 PM
RE: Preamp mods - by Drew1d - 04-25-2023, 05:49 PM
RE: Preamp mods - by Drew1d - 04-25-2023, 05:55 PM
RE: Preamp mods - by K O'Connor - 04-25-2023, 07:19 PM
RE: Preamp mods - by Drew1d - 04-27-2023, 03:12 PM
RE: Preamp mods - by K O'Connor - 04-27-2023, 05:20 PM

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