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Hoffman Amps Forum image Author Topic: Liverpool build  (Read 1908 times)

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Offline Scsoul

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Liverpool build
« on: November 23, 2016, 12:33:48 pm »
Im working on a 2 el84 trainwrel liverpool type and have a few questions since i cant log on at amp garage,  on v1 pin 2 the wire coming from volume pot should it be a shielded wire grounded at one end? Also should i change anything in the phase inverter?  And also the input i used a grounded wire should i also use a 68k or so grid stipper?  Any help would be greatly appreciated. Thanks mark

Offline Willabe

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Re: Liverpool build
« Reply #1 on: November 23, 2016, 01:00:47 pm »
.....on v1 pin 2 the wire coming from volume pot should it be a shielded wire grounded at one end?

If V1 is a 12AX7 then pin 2 would be the input grid, so yes you can use shielded wire grounded at only 1 end. 

And also the input i used a grounded wire should i also use a 68k or so grid stipper? 

Could you explain what you mean by "a grounded wire"

Most guys here would use a grid stopper. I would too. 


Offline sluckey

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Re: Liverpool build
« Reply #2 on: November 23, 2016, 01:04:24 pm »
I would use a shielded wire between volume pot and V1-2. I would not change anything about the PI. I would use a wire and a 68K between input jack and V1-7.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline Scsoul

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Re: Liverpool build
« Reply #3 on: November 23, 2016, 01:34:07 pm »
  Thanks guys, by grounded wire i simply mean shielded wire grounded on one end.

 


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