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Messages - Freddie

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Amplifier Discussion / Re: Frontman 25R mods
« on: February 08, 2014, 06:56:09 PM »
I was asked why d1 d2 were stupid. Well they are whats known as hard clipping diodes. The problem with the distortion is it is too hard. Getting rid of the hard clipping stage would leave only soft clipping like a tube screamer pedal sounds so much nicer.

The Newcomer's Forum / Yamaha ba-10, ga-10
« on: May 11, 2010, 07:19:37 PM »
Anybody have a schematic for these amps ? Can not find one anywhere. :loco

Amplifier Discussion / Re: Frontman 25R mods
« on: February 11, 2010, 07:27:47 PM »
Being poor and not able to afford anything that glows in the dark I have to work with what I have. NO I don't play loud I hardly ever turn it above 3. I play at home for my own pleasure not giging too old at 56 for that. I would like to replace the nickle and dime opamps with some OPA2228's. Just wondering what the hell Fendr put the stupid diodes in there for. If they are not needed for the JFET switching circuit it would sound better without them. I don't want to start changing things without a plan. Would also like to get a Ramrod speaker in there.

Amplifier Discussion / Frontman 25R mods
« on: February 11, 2010, 06:37:11 PM »
Trying to get a better drive sound from the 25R. Looking at the schematic of the 15R and the 25r the difference in the two circuits seems to only be the switching and two diodes. What would be the purpose of D1 and D2 in the 25R drive circuit?

Tubes and Hybrids / 12AX7 Driver in Fender 25R
« on: February 07, 2010, 05:45:40 PM »
Wanting to hybreed My 25R Wondering where in the circuit to put the tube driver ? I am thinking of removing R55 before the final amp and putting the driver there. :loco

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