Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: kagliostro on November 30, 2014, 04:08:59 am
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Is this Grounding Layout correct (according with Doug's indications http://el34world.com/charts/images/ChassisGrounds_small.png (http://el34world.com/charts/images/ChassisGrounds_small.png)) ?
Layout
(http://i.imgur.com/bwpFdDw.jpg)
Schematic
(http://www.bensykora.com/7cylinder/7cylinder_final.gif)
Many Thanks
K
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Whell this tread was continued here http://el34world.com/Forum/index.php?topic=17904.0 (http://el34world.com/Forum/index.php?topic=17904.0)
I hope this won't generate problems, the other tread was relative to the general disposition of the components respect each other
here I ask if the grounding scheme is conform to what Doug's indicate as a good grounding
as to avoid confusion I add also here the new Layout
(http://i.imgur.com/CcQ2mgb.jpg)
K
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Franco,
It looks to me like you have a ground loop
You have two paths to ground from your pre amp bus
I would run it like this
A wire from your pre bus to the input jack ground
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Ciao Doug
On my draw I was thinking to use an isolated jack intake
Do you mean it will be better I use a not isolated jack intake at the input ?
Is my trouble on the buss soldered to pot chassis that are connected to ground ?
So, if I understand well, 6ak5 and 6j6 (preamp and PI) go to ground at the input jack, the other part of the amp to the bolt near PT, correct ?
Grazie per la risposta
Franco
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Hi Franco,
I don't know
I have never used an isolated jack and pot assembly
You could easily move ground wires around once the amp was built to find the quietest grounding points
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Grazie ancora
Franco