 RoeTest (Röhrentest) |
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RoeTest von Thomas L. Frobase, USA   He send me above pictures and following text: Helmut, I hope you are doing well! I wanted to send
you a note to tell you I finished my build. I only had a few problems,
all of them self-inflicted.
I had an open pin
on one of the SMD i2c chips on one of the relay cards, which
manifested itself as a short on the filament bus. I reflowed each of
the boards in an oven prior to building the through hole portion. I
guess I missed the open connection when inspecting the boards. The
other problem was the 300 volt supply would not adjust. Turns out I had
a 1k ohm instead of an 1100 ohms resistor. Incidentally if you read a
1000 ohm 1% with bands backwards it looks like 1100 ohms. Calibration
went well, I have been testing away for a couple of days.
I
ended up 3D printing the socket bed and covers. I also developed a
slide in tube socket holder. This is a lot easier than buying boxes
and cutting them out. I machined a piece of 3/4" aluminum to house the
socket receptacle. I would be glad to provide the STL files if others
would like to do the same.
It took a little
over 40 hours of labor to build. The reference to Reichelt was very
helpful. I bought the majority of the parts from them, relay's came
from one of my asian suppliers, Mouser supplied the rest.
Reichelt seems to be a pretty reliable supplier with a European twist,
freight was not unreasonable.
When I went looking for the ML A12 DIN they seem to be rare here in the states, again Reichelt had the best price.
Thank you again for
your innovation, I look forward to working with you in the future ...
Best Regards ... tom
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