one wire mod?

johnnyeggz · Post by **johnnyeggz** » Sat May 07, 2005 12:29 pm

what is and how do u install the one wire mod?...how dose it alter the tone?.....thanks ....johnny eggz

Dan · Post by **Dan** » Sat May 07, 2005 5:52 pm

I dont I know what the one wire mod is. By name anyway.

Dan

johnnyeggz · Post by **johnnyeggz** » Sat May 07, 2005 6:21 pm

i saw it on another site it says...." one of the common mods for a super lead is to cascade (not bridge) the front end mixer circuits also known as the one wire mod"....make any sence to u?

Flames1950 · Post by **Flames1950** » Sat May 07, 2005 6:25 pm

The "one-wire" mod is a way of cascading the the channels in the standard four-input amp for more gain and a pseudo-MV arrangement of the volume controls (one volume for one gain stage, one volume for the next gain stage and the overall amp volume.)
I can tell you how I would assume the mod is done; but understand I have never actually done the mod nor seen it done.
The two channels come together at two 470K resistors (one of which usually has a 470 or 500pF bright cap across it.) Disconnect the wire going to the resistor with the cap across it (ch. I) which will need to be connected to the input of the other channel. You can connect it by connecting to the green wire on channel II's high input jack, or you can remove the wires going to channel II's pair of 68K resistors and connect to one of those terminals (if it is a PCB amp this is not an alternative to take lightly.)
I would connect to the high input jack on ch. II myself, in hopes that you can still use the ch. II jacks as a regular-sounding Marshall input. You may have to adjust the channel I volume to prevent your signal from bleeding off into that channel when using channel II by itself though.
Anyone out there actually done this mod to verify what I'm saying?

johnnyeggz · Post by **johnnyeggz** » Sat May 07, 2005 6:40 pm

well i already jumped the pins on v1....and added a rich mod mv....so is that kinda the same thing?

Flames1950 · Post by **Flames1950** » Sat May 07, 2005 6:50 pm

No, it won't be the same thing at all.
What pins did you jump on V1? Jumping 3 and 8 (after disconnecting the yellow wire that was goin to pin

will run the amp as shared cathode; Jumping pins 2 and 7 will let you only use two input jacks to run both channels at once.
Neither is the same as cascading the channels.

johnnyeggz · Post by **johnnyeggz** » Sat May 07, 2005 7:22 pm

2 and 7

5150loveeddie · Post by **5150loveeddie** » Sat May 07, 2005 8:55 pm

check this out also...

http://www.metroamp.com/forum/viewtopic ... ht=cascade

This was giving to me by ****** himseft but I didn't try it yet still, some say it's to harch sounding, I'm using an extra stage instead now on one of my SLs and its fantastic!

johnnyeggz · Post by **johnnyeggz** » Sat May 07, 2005 10:35 pm

how do u add a gain stage?

5150loveeddie · Post by **5150loveeddie** » Sun May 08, 2005 2:18 am

You've jumped 2 and 7 on V1? Why?

johnnyeggz · Post by **johnnyeggz** » Sun May 08, 2005 9:17 am

it jumps the channels internally.....so u dont need a patch cord....just plug in hi 1 input and use both volumes to blend channels....for some reason it sounds better than using the patch cord method

Billy Batz · Post by **Billy Batz** » Sun May 08, 2005 10:57 am

Now that I read that I have heard of it refered to as 'one wire mod' before. Your JCM800izing your super lead is all.

5150loveeddie · Post by **5150loveeddie** » Sun May 08, 2005 1:30 pm

yeah ok got ya, you don't have that drop (with the 1mg resistor ) from the jacks and no wirering so less capacitance loss......

johnnyeggz · Post by **johnnyeggz** » Sun May 08, 2005 9:35 pm

hey batz...do u mean jumping pins 2 an 7 is 800izing the amp or do u mean what 5150loveddie said for me to do is 800izing the amp?.......and go get ur shine box

Billy Batz · Post by **Billy Batz** » Sun May 08, 2005 10:54 pm

I mean cascading the gain stages is 800izing. Jumping pins 2 and 7 just bridges the channels so there both always active like using a jumper patch cable.

That quote used to be my signature but I got tired of it.