Mark Huss plexi with 6v6

[chuckb]

Hey guys, I need some direction in wiring up the preamp in this amp. Are the bass and mids pot inverted on the schematic as opposed to the treble pot? I wired them as if they were backwards to the treble. I have been having trouble with the treble wired this way as it seems to increase the volume when turned up.Don't seem to have much bass and mid controll either. The amp plays good other than the preamp problems. Also I'm still getting sound from my guitar when the standby switch is in the off position, It's not loud but very noticable. what's causing this to happen? any help would be greatly appreciated?

thanks,
chuck.

[chuckb]

[ATTACH=CONFIG]24620[/ATTACH][ATTACH=CONFIG]24620[/ATTACH]

Hey guys, I need some direction in wiring up the preamp in this amp. Are the bass and mids pot inverted on the schematic as opposed to the treble pot? I wired them as if they were backwards to the treble. I have been having trouble with the treble wired this way as it seems to increase the volume when turned up.Don't seem to have much bass and mid controll either. The amp plays good other than the preamp problems. Also I'm still getting sound from my guitar when the standby switch is in the off position, It's not loud but very noticable. what's causing this to happen? any help would be greatly appreciated?

thanks,
chuck.

anyone?

[defaced]

Schematic, layout and pics of this section of your build would be helpful. I think you'll find most here can help you with anything, but they need the basic reference documents to get started.

[big_teee]

Probably this one.
The Plexi 6V6
http://mhuss.com/Plexi6V6/Plexi6V6c.gif

[chuckb]

yes, i posted a copy of the schematic but i guess it didn'yt go through. here it is;

Chuck.

[chuckb]

attachments doesn't seem to be working. Big teee has the one I'm talking about. the schematic is there.

[chuckb]

[chuckb]

finally!

[g1]

The bass and mid pots are not inverted, wire them the same direction as the treble. The arrow beside each pot shows that they all go the same way. The way the wiper looks different is just for drawing purposes so he doesn't cross lines. The wiper can be drawn on either side of the main track.
As far as the standby, do you still hear something after you go on standby for a minute or so? It will take a few seconds for the caps. to discharge and you will still have sound during this time. But once the caps are discharged you shouldn't hear anything. If so, double check your wiring.

[chuckb]

thanks g-one, i have the pots wired wrong then. when i turn on the power switch when the amp is in standby mode I hear the guitar when the amp is supposed to be quiet.

[52 Bill]

thanks g-one, i have the pots wired wrong then. when i turn on the power switch when the amp is in standby mode I hear the guitar when the amp is supposed to be quiet.

Traditionally when there is an arrow alongside the pot on a schematic, the arrow points in the direction of clockwise shaft rotation.

If the amp is still making sound when the standby switch is open, check the switch and check the wiring, because you must still have some voltage getting to the audio circuits.

[chuckb]

Traditionally when there is an arrow alongside the pot on a schematic, the arrow points in the direction of clockwise shaft rotation.

If the amp is still making sound when the standby switch is open, check the switch and check the wiring, because you must still have some voltage getting to the audio circuits.

yes, i've since changed out the switch for a new one but it's still happening. Anywhere else i can check?

[52 Bill]

yes, i've since changed out the switch for a new one but it's still happening. Anywhere else i can check?

If you have it wired like the schematic, there will be no positive voltage on any of the circuits when the standby switch is open.

Measure the voltage at the first filter cap with the switch open and closed. If there is any voltage there with the switch open, then trace the wiring to see where it is coming from.

[chuckb]

If you have it wired like the schematic, there will be no positive voltage on any of the circuits when the standby switch is open.

Measure the voltage at the first filter cap with the switch open and closed. If there is any voltage there with the switch open, then trace the wiring to see where it is coming from.

Hey bill, yes I'm getting a voltage reading of 185v when the switch is off and a reading of 168V when the switch is on.

[big_teee]

Got any pictures we could see of the wiring side?
T