Elrog 300B vs Takatsuki 300B tubes

Hi Dracule1

>Let's hope Elrog makes a version that can handle AC filament supply.

ER300B can handle AC filament supply...the problem is the residual hum...depending on the speaker sensitivity. Thats why we recommend DC heating.
The problem is the very small thermal mass of the very thin filament wires, necessary matching the heater specification of WE (5V,1.2A) using thoriated tungsten filaments (Filament temperature is about 1650°C instead of about 700°C).
We could build 300B using oxide coated filaments, but this would be another (boring) copy of the 300B only...
Using thoriated tungsten is the reason of sound improvment, because the behavior is very different.

Matthias

Matthias,
I find it quite interesting that the filament material so positively influences the sound quality of a tube. All I can do is confirm what I'm hearing, beautiful music reproduction.
Charles,

Dear Matthias, thank you for responding to my concern. I have never used your 300B tube so I have no practical experience with AC filament supply with your tube. I have the Lampizator Golden Gate DAC that can use 300B, 45, or 101D tubes at the output. I really wanted to try the Elrog 300B tubes, but I was told by one of your former retailer in the USA that the Elrog will certainly FAIL if AC filament supply is used. The Golden Gate uses AC filament heating, so I was very disappointed. Do you think Elrog 300B is compatible with the Lampizator Golden Gate DAC?

Dear Matthias, given Elrog 300B failure in Wyan001's Lampizator DAC, I would not take the risk of buying a pair of your 300B tubes, unless I can be assured by you that your tubes will work fine with the Lampizator GG DAC and will be backed up by prompt replacement or refund if failure does occur. I'm really hoping you can assure me. Regards.

Well after comparing the Elrogs to the Taks I can say the Elrogs are the better sounding tubes with my Franks.
They have wonderful weight and fullness of tone without losing detail and transparency. They are very musical, with piano in the lower registers they are so natural.
The Taks are a little thin in the upper bass and lower midrange in comparsion, but excels in the upper midrange and treble.
The Taks have excellent air and spaciousness and tighter bass.
They are both excellent, but IMS the Elrogs are better.

Hopefully, Elrog fixes the reliability problems. This is my second set that George Lenz gave me to better match my Franks. One of them failed in less then 40hrs. He replaced the bad tube and I'm keeping my fingers crossed that they will last.
They are really wonderful tubes and just make music hopefully, we'll have no more problems, we'll see. George stands behind his tubes and has great customer service so no worries there.

Joe