Wow- great posts coming from the home of
@tedwoods! I’m glad to see the activity here as it seemed most had either moved onto other dacs or maybe had just settled in on the tubes they love and decided no further rolls were needed.
Not me- and tonight I’m posting a tube that I’ve had to wait two months to hear. So far, it was worth wait!
So while rummaging through the last radio swap meet I found a tube that I had never seen or heard of before. The tube is the Arcturus Type 18 pentode.
The seller had five of these, all matching date codes in original crumbling boxes- so five is what I took. I didn’t realize until I had gotten home that day that these require a UX-6 socket and 14V filament supply.
Since I have a variable voltage setup on my TRP all I needed were to order adapters with UX-6 to octal sockets with the appropriate leads- and that’s where the waiting came into play.
Finally- I’ve got these in and playing and I have to say that I really like what I’m hearing. I’m a huge fan of the early 6L6 ST glass tubes as well as the EL5 and so far these tubes have a little of both in common.
So far I’ve only listened to one release but the sound continues to open the more I play. The first thing that struck me was the power felt in the bass regions- so far a little stronger than most pentodes.
Highs aren’t exactly what I would call rolled off but are very even/level when compared to the midrange. So not overly sparkly but definitely present. These tubes have a very smooth sound, whether it’s refined or just relaxed time will tell.
I’m not sure about the overall availability on this tube as I’ve not seen them before but if you ever happen to come across a pair/quad, have UX-6 adapters and the ability to provide 14V to the heaters this is a very cool tube.