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Hoffman Amplifiers > Other Stuff > Effects (Moderators: Geezer, tubenit, PRR, sluckey) > Mosfet FX loop
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tubenit
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« on: May 28, 2012, 06:58:28 pm »
Guys,

Do you think this would work to use mosfets instead of a tube for a D-latorish style active FX loop?

Revised the schematic and reposted it.

With respect, Tubenit
« Last Edit: May 29, 2012, 08:23:55 pm by tubenit » Logged
sluckey
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« Reply #1 on: May 28, 2012, 10:19:13 pm »
What does the original circuit look like?
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Geezer
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« Reply #2 on: May 28, 2012, 11:21:59 pm »
Quote from: sluckey on May 28, 2012, 10:19:13 pm
What does the original circuit look like?



Steve,

Sorta like this....

G

LND150 Datasheet>  http://www.datasheetarchive.com/LND150-datasheet.html#

* Dumbleator.jpg (138.06 KB, 1061x578 - viewed 97 times.)
« Last Edit: May 28, 2012, 11:30:43 pm by Geezer » Logged
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sluckey
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« Reply #3 on: May 29, 2012, 06:23:27 am »
I think it's doable. May not even need tweaking.
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TIMBO
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« Reply #4 on: May 29, 2012, 02:34:29 pm »
Looks good T, I assume this circuit won't draw much current?? As i am already close to max with the transformers i have on the little wing
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tubenit
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« Reply #5 on: May 29, 2012, 08:25:04 pm »
I am thinking this might be better.

with respect, Tubenit

* FX layout mosfet.gif (41.6 KB, 1122x847 - viewed 133 times.)
* FX layout mosfet.sch (19.89 KB - downloaded 40 times.)

* FX schem (mosfet).gif (39.67 KB, 1122x847 - viewed 169 times.)
* FX schem (mosfet).sch (23.37 KB - downloaded 39 times.)
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jojokeo
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« Reply #6 on: July 14, 2012, 01:12:46 pm »
Hi tubenit,
Have you tried this on your amp yet? JFETs appear to be "plug and play" but they aren't that easy as they need to be biased properly same as using tubes. I just discovered this LND150 on own about a month ago. (wish I'd been looking at these threads in SS before now as you guys are as usual ahead of the curve - "my curve" anyway)
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tubenit
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« Reply #7 on: July 15, 2012, 05:58:16 pm »
Haven't tried it and decided to not build it.  Sorry.

With respect, Tubenit
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