Hi there,

I just finished my first build and I'm having some problems. It's Ceriatone plexi super lead 100watt. The amp is running way to hot even when I bias it for 60% plate dissipation. The V5 & V6 power tubes are flashing red when ever I push the amp and there is a nasty buzz coming from the PT. I've measured the plate voltage at pin 3 of the power tubes and I'm getting 518VDC. According to Nik it should only be about 460-470VDC. I'm also getting 3.45VAC for the heaters, this should be 3.15VAC.

The amp is pretty much stock except for a couple of minor tweaks : Reduced Screen filter Caps from 50+50 down to 32+32, I bypassed the voltage selector (I'm in Australia so I routed the 240V tap straight to the mains, Point "C" on the layout diagram, and tied off the 100 and 120 volt taps with heat shrink). Ive used the voltage selector switch to make the Negative feedback loop switchable from 4 to 8 to 16ohms rather than just fixing it at the 8ohm speaker tap.

I can't see anything obvious and Ive checked all of my connections a number of times. Could I have the wrong voltage tap from the PT, I used the red wire labeled 230V on the layout (Australian wall voltage is 240VAC @ 50Hz 10Amps).

I geuss I jumped in the deep end with this build but I've been very methodical about it and have spent nearly a year researching before I started the build.

Nik has been very patient and helpful, but I thought I might get a few more ideas from people.

If anyone thinks they have an answer, please drop me a line.

Cheers

Scott

Hi everyone,

I'm new to this forum and I'm looking to buy a Kit to build. I've narrowed it down to a 100watt Plexi super lead. Can anyone give me an idea on the main tonal difference between the standard Super lead and the "Brown MKII". I have been  trying to find some decent clips for the Brown variant but most of them seem to be laden with effects (everyone is trying to sound like EVH, not entirely a bad thing but I'd just like to get a straight comparison). javascript:replaceText('%20:)',%20document.forms.postmodify.message);

Thanks

Scottypb71