the picture u choose not more than 100k or 600X400 by size.
Ah.. thanks krub. Sorry cannot type in Thai on this PC.
I don't know AHT in person & just a client since I am new to tube, no time & afraid of high voltage -- though having working on solid states, chipamp and the Zen for several years since Magnet PR + MA-3 1 in the old days(still remember that?

) ... just don't want to mention any things that may negatively impact to the commercial ones.
The funny thing is that, at first my (fault) reason for DIY is about saving money however I usually spent more over budget than expected and keep spending on other projects....
