January 28, 2011 at 7:20 pm #5183
Hey all, this is my first post on the new site (was Mewzik Man on the old forum). I’ll soon post pics of a mahogany cab I’ve been building for my 2stroke – it’s kept me too busy to start the actual amp, until now!
I’m about to start drilling the chassis, and I’m considering adding a switch to lift the negative feedback loop or vary the resistance on this circuit.
1. Has anyone experimented with the nfb loop on the 2stroke? what were the results?
2. what kind of switch will i need (heavy duty, or will any lightweight thing do)?February 7, 2011 at 7:37 am #5315
anyone??March 14, 2011 at 6:49 am #5380
I’ll come full circle and reply to myself for the benefit of anyone who’s wondering about nfb loop in the two stroke:
It sounds great both ways! With the loop intact it’s tight & a bit cleaner. With the loop lifted — more dynamics! More squishy overdrive! I debated putting in a pot to get the in between shades, but I’ve decided that on/off is all I need for a great range of tones.March 15, 2011 at 4:53 am #5381DeepBlueParticipant
Awesome, I am a new member on here, and just recently finished my first 2stroke. I love it! Id be interested in seeing your wiring or a schematic for how you have your NFB switch set up. Its always nice to learn something new, a new trick or way to get different tones.March 17, 2011 at 6:27 am #5387BluestrokeParticipant
I’m with Deepblue,I’d like to see how you wired your nfb switch.March 18, 2011 at 9:43 pm #5388
Nothing fancy. I just put a SPST mini-toggle between the 68k nfb resistor & the output jack. I’m at work & don’t have the layout drawing handy, but when I post some photos next week I’ll point it out. In one position the loop is complete, in the other the circuit is broken (not grounded).April 14, 2011 at 9:30 pm #5411BenDrParticipant
Nice gutshots! I’m curious- How often do you use the NFB switch, and did you consider wiring it to a footswitch?April 15, 2011 at 6:47 am #5412
The NFB switch is pretty much always on (circuit is broken, i.e. no negative feedback). I like the dynamics. Then again, I flicked in back in tonight for a change & the amp tightens up & shimmers a bit more. Didn’t think of the footswitch at the time.April 22, 2011 at 2:45 pm #5442AndyKeymaster
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