freestompboxes.org

very nice amp!

any layout? pcb? gut shots? or something?

I have a 5210, but I don't know how similar they are.

Hi There

there are some shots of the board here ...

http://www.trademe.co.nz/Music-instrume ... 032784.htm

don't know if that helps .....


a

andy123 wrote:Hi There
there are some shots of the board here ...
http://www.trademe.co.nz/Music-instrume ... 032784.htm

wow it is very simple! thank you

Ripthorn wrote:I have a 5210, but I don't know how similar they are.

please Ripthorn some shots for copy the pcb and component value

I will see if I can get some shots, the amp is in my baby son's room, so access is limited (since he sleeps a lot), but I will get some as soon as I can.

The 5210 schematics are there too : http://www.drtube.com/marshall.htm#JCM800SS-5005
It's not quite as simple ...

I took a bunch of shots, not sure what you need, but here are a few:

ohh!! thank you so much :thumbsupi

I think very difficult, it' s a 5010?

I was thinking about a pcb as the marshall lead 12 but with 30w

thank!

How is it possible that 5010 (10W) and Master Reverb 5203 (30W) with the same (identical!!!) power amplifiers (as shown in the schematics below), have different power?

http://www.drtube.com/schematics/marshall/5010.gif
http://www.drtube.com/schematics/marshall/5203.gif

Can someone explain this? And if so, how increase the power from 30W to 50W?

It seems the 5010 is 30W, not 10W, according to the manual:

http://www.drtube.com/schematics/marsha ... manual.pdf

ddpawel wrote:How is it possible that 5010 (10W) and Master Reverb 5203 (30W) with the same (identical!!!) power amplifiers (as shown in the schematics below), have different power?

http://www.drtube.com/schematics/marshall/5010.gif
http://www.drtube.com/schematics/marshall/5203.gif

Can someone explain this? And if so, how increase the power from 30W to 50W?

Hi,
Maybe this is not the case, but in principle you can use a different Vsupply value and deliver more power with the same outut stage (given you size the heatsink correctly). Power goes with the square of V, so small Vsupply variation influence much.
Regards,
lcv

Thank you for information. Name of this amp is misleading.

Going back to the second question, how to increase the power of this amp? MJ3001 and MJ2501 can handle significantly more power than the 30W. How to modify 30W to say 50W?

Hi,
It's not a trivial thing.
First you have to redesign and replace the power supply (also mechanically),
then it comes down to two things:
1) heatsinks recalculation
2) verification of the power dissipation/voltage rating/ current ratings of the rest of circuit.

To me, since usually thees products are cost-optimized, there is few margin to squeeze out more power from the same circuit w/o compromise reliability.
Just my poinion,
Regards,
lcv