Hello,
Yes, there are some challenges on the ER300B...
This tube is really new. The first series where build in October 2014. This are the first (300B like)tubes using thoriated tungsten as cathode/filament. To fit the 1.2A/5V filament specifications a VERY thin cathode wire is required.
That makes thinks difficult. An oxide coated filament is much more simple and much easier to handle but the sound is the same as the russian or chinese derivates...so we dicided, to build 300B like RF tubes using thoriated tungsten as filaments because the sound is MUCH better.
@brownsfan
We will replace the failing tubes, doesn't matter they where fail 2days, 2month or 2years post warranty.
Matthias
Yes, there are some challenges on the ER300B...
This tube is really new. The first series where build in October 2014. This are the first (300B like)tubes using thoriated tungsten as cathode/filament. To fit the 1.2A/5V filament specifications a VERY thin cathode wire is required.
That makes thinks difficult. An oxide coated filament is much more simple and much easier to handle but the sound is the same as the russian or chinese derivates...so we dicided, to build 300B like RF tubes using thoriated tungsten as filaments because the sound is MUCH better.
@brownsfan
We will replace the failing tubes, doesn't matter they where fail 2days, 2month or 2years post warranty.
Matthias