Author Topic: Eden Nemesis Bias Adjust  (Read 385 times)

Offline aussie dave

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Eden Nemesis Bias Adjust
« on: April 06, 2018, 11:53:33 PM »
Hi guys,           

tech question here.... I recently acquired a Nemesis NC320 that had faulty caps.  I replaced them and the amp seems to be working well.  I'd like to make sure everything else is good.  There seems to be a bias adjustment pot on the pre-amp board (100k ohm trimpot)  and 2 pads nearby marked "Gate N"  and "Gate P".  The schematic shows them as literally being connected to the gates of the N channel and P channel FET's.  (Seems logical)  What I'd like to know is what the adjustment should be?  I presume I will measure some amount of millivolts across these pads and adjust to an optimum setting?  I know it is 7 mV for the WT800's, etc, but is it different for this circuit (being FET's)?

Thanks,
Dave

Offline Rip Van Dan

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Re: Eden Nemesis Bias Adjust
« Reply #1 on: April 08, 2018, 04:40:50 PM »
Hi Dave,

Welcome to the Garden!

Armin (Bassman1968) will probably make an appearance shortly and should be able help you with those specific questions.

Dan
Rip Van Dan
Dan Gracia
'82 US-made Fender Jazz Bass with maple neck
5-string Rogue LX405 Pro (Surprisingly good "no-name" bass)
WT500/800 Highwayman (signature model)
D.N.S 410-8
Line6 X2-XDS wireless
=========
spares:
Eden RS400, GK BK250, GK 115 cab, acoustic B410 cab, Sunn Beta 202 (2x12)

Offline Bassmann1968

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Re: Eden Nemesis Bias Adjust
« Reply #2 on: April 09, 2018, 03:14:02 AM »
Hi Dave and welcome to the Garden,
should be 0.33V DC.
Rock on!
Armin

PLEASE LIKE EDEN ON FACEBOOK!!!
No schematics available!!! Don't ask for it.
;)

WTP-Pre,1350,WTX260,WT300/400,WT1000,WTX1000N,NAV,WTDI
D112XLT,D210XST,D410XLT,D810RP,DNS410,DNS112

Offline Rip Van Dan

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Re: Eden Nemesis Bias Adjust
« Reply #3 on: April 10, 2018, 05:50:08 PM »
And it's Armin to the rescue again! Way to GO Armin!

Dan
Rip Van Dan
Dan Gracia
'82 US-made Fender Jazz Bass with maple neck
5-string Rogue LX405 Pro (Surprisingly good "no-name" bass)
WT500/800 Highwayman (signature model)
D.N.S 410-8
Line6 X2-XDS wireless
=========
spares:
Eden RS400, GK BK250, GK 115 cab, acoustic B410 cab, Sunn Beta 202 (2x12)

Offline Bassmann1968

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Re: Eden Nemesis Bias Adjust
« Reply #4 on: April 11, 2018, 04:00:58 AM »
;)
Armin

PLEASE LIKE EDEN ON FACEBOOK!!!
No schematics available!!! Don't ask for it.
;)

WTP-Pre,1350,WTX260,WT300/400,WT1000,WTX1000N,NAV,WTDI
D112XLT,D210XST,D410XLT,D810RP,DNS410,DNS112