Liverpool - vvr - scratchy pots

Express, Liverpool, Rocket, Dirty Little Monster, etc.

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gary
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Liverpool - vvr - scratchy pots

Post by gary »

Hello gang

this is my first home brew 'whole amp' vvr attempt on a Liverpool clone. Just want some re-assurance about the locations for the scratchy pot filters. Am I right that I will need one on the input and one on the volume pot wiper?

Thanks
rfgordon
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Re: Liverpool - vvr - scratchy pots

Post by rfgordon »

yes. You want a cap between any pot (guitar or in the amp) and the grid it feeds. This will block the DC grid emission.
Rich Gordon
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"The takers get the honey, the givers get the blues." --Robin Trower
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UR12
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Re: Liverpool - vvr - scratchy pots

Post by UR12 »

Don't forget to also add a 1 Meg resistor off of the grid to ground
so the grid will have a DC ground reference.
JamesHealey
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Re: Liverpool - vvr - scratchy pots

Post by JamesHealey »

Let me know how you get on Gary! Would love to hear it powerscaled sometime!
gary
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Re: Liverpool - vvr - scratchy pots

Post by gary »

Thanks guys.

James - it's the only way I'll ever get the benefit of your handiwork! I'll be careful with it.
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angelodp
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VVR

Post by angelodp »

Put this on my Rocket and it cleared the DC.

Image

Image
Last edited by angelodp on Thu Feb 17, 2011 7:13 pm, edited 2 times in total.
gary
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Re: Liverpool - vvr - scratchy pots

Post by gary »

Thanks for the picture - especially helpful to us novices
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angelodp
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sure

Post by angelodp »

I know that the paint by numbers is frowned upon, but it really does help clarify concepts to see the components in place ( for me ).
JamesHealey
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Re: Liverpool - vvr - scratchy pots

Post by JamesHealey »

I find layouts really confusing much prefer schematics but i understand why many like them. What ever works for learning everyone learns differently
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angelodp
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agree

Post by angelodp »

Yes, ultimately the schematic shows all.
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