This does look great. I've been wanting to try one of these amps again, now that the wound of my previous attempt is healed and forgotten. Would this 12ax7 version use the same or similar transformer?
The only difference here would be the Tubes are Full Sized & The Nixie Supply is different, the rest is the same and the 125A Would still be the Tranformer to use, it's kinda the best of both worlds in my book (Except for the slightly larger enclosure).
I did consider making a version with the original 555 Nixie aswell, but I think the MAX1771 is more efficient so will work better with Full Tubes if I understand it correctly... which I don't.
Pete, I find that type of layout really hard to visualise compared to DIYLC, but I think it's really neat how you've got everything onboard. The whole concept is very attractive to me actually, I'll have to build one! BTW, I've used a single 0R1 resistor in MAX1771 based builds with success. I also altered the trimmer and associate voltage divider values slightly.
Ahh, I did wonder about visibility, if you try and print the image of the layout the same as DIYLC though it all comes out in all black and looks even more confusing... or in colour in XML documents but I have sod all clue what an XML document is or how to use it.
It does connect up properly though, i'll tweak it and check it some more and add a final version up tommorow, i'm certainly going to build one up in the future once i've got hold of a PCB and Transformer, let me know if you beat me to it though! Be great to verify this one.
Cause I think we can all agree... wiring Pots by hand is a right pain in the Arse.
I'll leave the extra pads for the parallel resistor... just incase someone can only find a 0R2, doesn't really make a whole lot of difference to the layout.