The 50CA10 is a triode tube built for Luxman by NEC. It doesn't get much mention because originals are very rare. Fortunately Shuguang has started producing them again so I don't have to panic. I've been waiting for Thomas Mayer over at Vinyl Savor to write about them because I do not have very much information on them and his write ups are great. Don't expect any tube dissections here.
There are only two amplifiers that I have found that actually used this tube. One of them is the Luxman MQ60 which is a 30WPC Push Pull amp . Now that the Shuguang is manufacturing these tubes again I've seen several DIY amplifiers use them in SET and Push Pull amplifiers.
Here are the well used and loved 50CA10s my Lux MQ60 uses. They will need to be replaced soon I'm sure.
Here is a pic of the replacement option from Shuguang via Leisure Audio.
Now that I have my tube amp stable and sounding great I thought I'd indulge in some tube rolling.
Well I pop in this sold to me on ebay as NOS Hytron CBS branded tube...
The sporadic sound can only be described as 1,000 fingernails down a chalkboard
while 10,000 eagles screeched at their prey. I snapped this photo right
before that noise happened. I must have jumped pretty high. Since this was not a success I put the RCA or Sylvania back in and all was well with the world again.
This article was released on the heels of Bruce Edgars Voigt article and PWK interview. I have great appreciation for Bruce Edgars early work. This article by Brian Taylor is rather recent for what I usually post.
I really like the unfolded Klipschorn pic. Amazing that this was folded into something so small as the Klipschorn bass bin.
Jim Hunter Klipsch engineer and historian posted this great pic on the Klipsch site. Not sure what is going on here but that is a big plywood and foam horn. I'd like to see a better pic and get more of the story.
Jim and Hunter are rather tall guy's so this horn should be large 6ft-8ft x 6ft-8ft. I'd like to see more of these experimental fun horns they built.
This is a great article about Moondog. There are several pictures in this article I have never seen of him. I had no idea that he lived like this in the hills of NY. Just unbelievable that a national treasure lived like this... WTF.
For a sense of scale here is Kevin Harmond with the Klipsch HLS. That is a good size for a horn loaded sub. It would be a blast to put all manner of larger horns on top of this perhaps a Jubilee and some tractrix horns. That would only be about 15ft high lol.
Nice of them add a cherry beauty panel.
This guys room has to be huge.
Top notch construction hand made in Hope, AR USA.
"commanding 20hz bass response"
After Klipsch latest showing at CES it is clear that Klipsch pro cinema is where the true principles of PWK are being kept and built upon. The new consumer stuff just leaves me baffled.
“I like big horns and I cannot lie, those little horns make me cry” Tom Danley "Simple. A horn is just a reasonably rigid boundary for an air column. Now all you have to do is figure what shape to make it." PWK