SLO Preamp AiC fun !

[CrazyNutz]

Is this the one you changed the output section to EL34's ?

I did try e34L, kt77, and kt66 in this one. But no it's not the one I built specifically for el34.

 

[Ben Waylin]

I did try e34L, kt77, and kt66 in this one. But no it's not the one I built specifically for el34.

So, on that one.. did you just like drop an SLO preamp circuit into a JCM-800 ?

Basically ?

 

[CrazyNutz]

So, on that one.. did you just like drop an SLO preamp circuit into a JCM-800 ?

Basically ?

I used the same PCBs from C3. Just changed some values. 1k on the screens, 5.6k on the grid stoppers, and had to adjust the value of the bias resister (R53 on the slo-clone schem) to get the bias in the correct range for el34. Lastly I used a 800/plexi style output transformer.

Also I just used a blank generic aluminum chassis. BTW I swear there's something about aluminum chassis that make the amp quieter.
Probably magnetic decoupling from the transfomers. Some may argue.

 

[Ben Waylin]

Did you purchase the chassis from C3amps ?

 

[CrazyNutz]

Did you purchase the chassis from C3amps ?

Yeah, the steel powder coated chassis is from C3

 

[Ben Waylin]

Looking at either getting a C3 kit, or maybe just the circuit boards and building it out in an old 50W amp chassis.

SLO preamp / JCM-800 output section.