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Fender M80 Overdrive Channel
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Originally posted by loudthud View PostYes, my bad.
What ever sounds good to you!
I found that increasing C4 beefs the lows and low mids nicely and I Like .0047 there..
As far as C7 and C10 I don't hear any tonal (pf) changes while switching different caps across the pcb standoffs..
Something tells me I needed to tweak C8 and C9 also..The .47 caps since we changed to 10k at those resistors.
I wonder if the substitution box and leads has it's own pf readings and that makes the changes within the circuit un-noticible?
I haven't messed with the two caps across the Contour control yet but I will...
If I could get the presence control to where I can hear it,I'd be golden leaving the OD as is...It's 100% better.
Reminds me still of a TS circuit being pushed into a clean amp..Has some compression to the tone,yet cleans up nicely on the guitar volume..Nice!Last edited by JSpina911; 08-01-2016, 01:25 AM.
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Sorry for reviving this dead topic, and forgive me if I'm way off... but I've got an M80 head in the attic that I never use for anything. I don't play 80's metal. But after looking at the schematic I got to thinking. If I took out the LEDs altogether, and replaced them with a jumper, I'd just have feedback loop symmetrical clipping, right? If I did that along with the tone shaping changes here, I think that might give a less shrill tone & also a lighter OD on the gain side. I guess there's no point, I could just put a TS in front of one of my other amps... but I can always use more projects for the hell of it.
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I'm going to resurrect it again!!
Have had this amp for 20 years.
I was into metal and what not when I first got it, so it was usable, as that's what it is made for.
Then I used it on clean in front of a digital processor for awhile.
Then didn't touch it for 10 years.
Always thought it was a bit of a piece of crap.
But dug it out on the weekend and it is way better than what some give credit for.
Subtleness is often lost on youth!
I probably never had the gain below 7!
It's funny, I had a Digitech GNX4 on it, which was probably 3 times the price of the amp at the time, and although you can get an amazing range of accurate sounding mimic tones with that, I was surprised when I dusted that off how little I liked it.
Saturated as hell!
Back then I thought the GNX was 'the shit' and the amp was literally 'shit'.
Just listening the other day, the amp is much closer to a tube sound than the GNX.
To my ears anyway.
The clean is great, and with the gain on like 1, you can actually get a half decent broken blues tone, which is what I'm after.
Interested in doing these mods, just wondering if old mate who did them is still around?
Want to know what kind of specific success he had.
I could just put a cheap TS mini in front of it, but even then don't know what it would sound like.
I too would just like to do it for fun.
Was probably the first real amp i ever owned.
Got it at the pawn shop cheap in about 2001, would like to keep her going.
Mine was a slightly later model in black shag
Not mine pictured, but same same, minus a missing knob.
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