Elrog 300B vs Takatsuki 300B tubes

Well, that bodes well for the end results of Charles' cathode resistor modification experiment, which was explicitly suggested to decrease a surge in voltage at power-up.  Hopefully that does indeed fix Elrog reliability problem... I guess we'll know in 6 months.

What I am referring to is the filament voltage at turnon and this has little to do with the value of the cathode resistor.  If the filament glows brighter at first and then settles down to "normal" it is being unduly stressed on turnon.  This goes for all directly heated tubes and it just so happens that the thoriated tubes make the situation much more visible due to their quick turnon.

dave

Charles, I did get your email and responded.  Did you not receive it?  Things are going reasonably well here, but I am doing everything I can to get lost in the hills.  Yesterday's hike was 14.4 miles with 3700 ft elevation gain.  Four hikes altogether in the last week. Paradise.   Not getting much listening time in.  2-3 hours a week at best.  I've been following the fuse discussion, and want to hear your thoughts on black vs red, especially in the CSL.  I still have a stock fuse in mine, so this could be a big step forward.  Keep me posted and let me know if I need to resend the PM.

Hi Bill,
I'm very glad that you are doing so well and indulging in your  hiking passion 😊
No  I didn't get your reply email, I am very interested in your in your thoughts on the two speakers. Bill the SR fuses are something quite special. The many positive comments about them are legit. If you only want to try just one,  put it in the CSL. The Red is excellent but the Black is a step above. They're terrific tweaks for the CSL.
Charles,