Fender frontman 25w mex modificaciones

[kmilo100fuegos]

Bueno, tengo este amplificador Fender frontman 25w mex, si bien tengo un mejor amplificador, queria modificar este para usarlo para practica  ya que es pequeño y me sirve para su traslado.

Ya le he cambiado el parlante y mejoro el sonido ahora estuve buscando por la red y encontre estas modificaciones al circuito del mismo: http://music-electronics-forum.com/t13690/

 

 

There are a lot of points for intervention, although little that would make it a) behave like a tube amp (if that's your taste), or b) behave like a higher-powered amp.

That being said, although 25 watts is enough to manage many situations, the smaller (10") speaker and smaller cab will offer less overall loudness than a larger, more efficient, speaker and larger more efficient cab. Speaker efficiency is rated with respect to how many decibels of sound-pressure level are produced in response to 1W of input at one meter distance. If one speaker is rated at 96db, and another is rated at 99db, the second will prioduce twice as much perceived loudness as the first, even with the same wattage. So, consider a more efficient speaker. The goal is not so much to make you louder. Rather, there may be tones you like that are hard to achieve without moving to levels/settings that introduce too much harshness. Having a bit of reserve power, by making more with the power you've got, might let you tap into tones you like more easily.

The distortion channel could benefit from some different tone shaping. At present, it introduces a midscoop by means of C9/C10/R16/R17. It also doesn't seem to introduce enough"treble-taming" in the distortion channel for my tastes. I've never played one, but just from looking at the schematic, my sense is that it would be a bit harsh.

So, if you can find these spots on the board, try to do the following:

1) Stick a 2k2 resistor between C10 and ground to lift the midscoop a little and make it less pronounced.

2) Stick a .01uf cap in parallel with D1/D2 to roll off some treble at the first clipping point.

3) Stick a 68-100pf capacitor in parallel with R22, to roll off a little more treble at the second clipping point.

All 3 suggested changes, taken together, will introduce a bit more lower mids, and make the upper midrange and treble bite in the distortion tone less intense. This may be more in the direction of the "bluesy" sound you want, and also require less tonal adjustment when switching from clean to overdrive.

 

Parecen ser cambios faciles, quisiera saber si alguien tiene idea si no voy a meter la pata metiendo mano.

Muchas Gracias!

 

[peterloved]

Bueno, tengo este amplificador Fender frontman 25w mex, si bien tengo un mejor amplificador, queria modificar este para usarlo para practica  ya que es pequeño y me sirve para su traslado.

Ya le he cambiado el parlante y mejoro el sonido ahora estuve buscando por la red y encontre estas modificaciones al circuito del mismo: http://music-electronics-forum.com/t13690/

 

 

Parecen ser cambios faciles, quisiera saber si alguien tiene idea si no voy a meter la pata metiendo mano.

Muchas Gracias!

a que llamas meter la pata? en mi concepto es un ampli de transistores que practicamente no perdes nada modificandolo, yo estoy en lo mismo con uno igual y me fui del todo para el otro lado, le estoy metiendo un preamp a valvulas emulando el Fender Bassman 1959, y el canal de distorsion le meti un fuzzface de germanios!!! hubo que rehacerlo por dentro y incluso bobinar un nuevo transformador pero la idea era convertirlo en algo para practicas pero que suene muy bien!! aun no esta ensamblado pero no falta mucho, cuando lo termine espero subir algun video del resultado...lo que quiero decir es que, si crees que puedes hacer la modificacion y lo logras, muy bien, pero si lo destruyes, pues mejor porque puedes hacer algo mas!!! adelante sin miedo!!