TW-inspired "Marshall" 1987 layout/build complete

[KGW]

Greetings all. I posted this over on the Metroamp/50W forum, but I thought that the many excellent amp builders at ampgarage would appreciate this.

After building a TW Express clone over the Winter, I was inspired to design a new layout for a 1987. My original version with the standard Marshall layout sounded great but was getting a bit messy from me messing with it (we all like tweaking).

Anyway, the noise floor on this new version is very low. Almost no hum or buzz. I also added bias test points and a 10-turn bias pot with a turns-counting dial (like in the Komet amps). I used 1W carbon film resistors on this version as well. I used 0.5W Vishays in my previous version. Both sound nice. I think that the carbon films sound a bit warmer.

If anyone is interested, I can share my layout files (images).

[m.alexander]

If anyone is interested, I can share my layout files (images).

Very Nice!! Wonder if you'd be able to share the layout and chassis design with me?

thanks!!!

alexander_mo at hotmail dot com

[KGW]

If anyone is interested, I can share my layout files (images).

Very Nice!! Wonder if you'd be able to share the layout and chassis design with me?

thanks!!!

alexander_mo at hotmail dot com

I sent you some emails - Kevin

[m.alexander]

I sent you some emails - Kevin

Thanks!!!!!!!! Nice work!!!

[wawa]

can you forward me a layout, I'm interested what cans you used for the amp. They look better than the traditional TW caps glues together!

[KGW]

can you forward me a layout, I'm interested what cans you used for the amp. They look better than the traditional TW caps glues together!

The caps are F&Ts. Nice caps, but a PITA to install the way I did. You'll need a big punch or hole saw of do a lot of filing.

I'll have to look around for the layout. There are more pictures here: http://beggingdogrecords.tripod.com/PPEL34.html

[Richie]

I think rockstar over there at the metro forum posted one of his amps he did.Which started as a marshall.

[KGW]

can you forward me a layout, I'm interested what cans you used for the amp. They look better than the traditional TW caps glues together!

Here are some layout drawings that I found. You may have to move the cap under the PSU/bias board (look at the pix on my website). Also, notice that my newest version has the bias feed resistors on the tube sockets and the raw bias voltage goes there as well.