it's really quiet here at the moment, but nevertheless posting what i have done this week up to now, so here is
the modder 's diary part 04:
finally found and ordered the 3.5mm connectors i will use:
they are made by Lumberg and as you see they are easy to mount, to solder, and the quality seems to be very good. also the connectors are nice looking when mounted on the frontpanel.
you won't believe, but this ultra small funny little pcb is a full functional dc/dc step down converter (with a dl92 tube for size comparison):
it can provide any voltage lower than the input voltage - 2 volt up to one ampere and can be adjusted even down to 1.4 or 1.25 volt. it's so small you even could mount it directly under each tube. i will use this pcb's for the filament / heater voltage. also you can use the boards to drive led's, but i found even smaller pcb's providing 1 to ten LED's with a constant current.
after my first try to make a frontpanel out of aluminium (really a hard job and material if you have only a small bench drill and no dedicated workbench with large tools, i now used doublesided copper plated pertinax:
i must say that Pertinax is much easier to cut and drill, also it has the benefit that it's much easier to paint than aluminium. to try also painting pertinax i mounted two pertinax pieces together before drilling to have two of them, the first to mount the components and the second as front panel:
i painted the front panel with five layers of DUPLICOLOR copper bronze effect laquer, while typing here the front panel has the night to get dry after 5 times beeing painted with clear varnish.
while this is also only a prototype to learn and exercise (the front panel is too small, i need a longer one for all the switches), a case made out of pertinax sheets and aluminium rods will look like this:
next week i will go to the local carpenter to get all the pertinax sheets cut for the final size case.
Edited by GermanGuy - 11/23/13 at 4:22pm