ETL GR10K

The GR10K is an early Nixie tube manufactured by ETL in Great Britain sold under the brand name &lsquo;Digitron&rsquo;. It is identical to the GR10H except for the omission of an anode grid. While this gives the tube a highly unique and appealing appearance with great visibility of the digits, it also means that there is nothing preventing sputter from the cathodes accumulating on the inside of…