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Larry/Star ground link ?
Posted: Tue Mar 18, 2014 10:18 pm
by Tone Slinger
Hi everyone, I was wondering if anyone has a link to the Larry ground layout for a 50 watt plexi build ?
Re: Larry/Star ground link ?
Posted: Fri May 16, 2014 5:55 pm
by Did J
This is for a JTM45 but works for what you're asking for. I follow the same node for my 1987:
http://forum.metroamp.com/viewtopic.php ... 41#p269137
Re: Larry/Star ground link ?
Posted: Mon May 19, 2014 9:11 pm
by catalin gramada
Hi.
It's not quite a "Larry" and not even a "star" but the same basic rule. My bus grounding for a 50w plexi style circuit. Despite some opinions those caps are easy replaceble if need it.Hope this help.
1-v1 cathodes resistors
2-v2 cathodes resistors / volume pots
3-presence pot / mid pot / output jacks ground
run the bus to a point bolted to chassis (near power section filter caps). tie at this lug: the bus /main filter cap /screen filter cap and power catodes
more few important directions: tie rectifier "-"pole or common PT right to main filter cap lug; tie common OT secondary right to output speaker jacks. it really not matter where you tie bias circuit and heater references but best to avoid places where currents traffic are, to not rise potential noise into signal chain. use nearly available points to chassis for instance.
ps; please not laugh.those power wirewound resistor are there just for tone consideration.
Cheers