Tag: D3a driver

300b driver experiments

01a preamp
300B Amp in action
I’ve been enjoying and carefully listening my new 300B amplifier. I have to say that I love every bit of its sound, treble detail and strong bass. The amplifier is fast and can drive very well my speakers. I only discovered that due to my low level DAC, the gain of the D3a in triode is yet not enough to get it to maximum power. So, I hooked in my beloved 01a preamp. The overall gain is too much of course so had to place the volume control at the output of the 01a stage.

I think a gain of about 130-140 should be ok. Perhaps if I get around in adding the 6SF5 stage then it may be good enough.

So this got me thinking. Of course I have on my list 2 driver tests:

Continue reading “300b driver experiments”

300B SE Amp: build part III (Layout)

Playing with the layout a bit, here is a view of potential layout of the amplifier board. The PCBs for mounting sockets, turrets and switches are very handy. It accelerates the build process and provides full flexibility.

You may not like the open look and feel, but who cares! I love the aesthetics and those OPTs are enormous!

300B Amp board layout