Ever since coming across these tubes (before I was thinking about building an audio amplifier) I wanted to build a lamp of sorts from one of them. I just love the idea of the glow. Now I'm glad to know the glass will protect from UV.
I did build a night light out of a small VR tube that glows orange (from Neon possibly?). I still wouldn't mind trying it if I could get the items I need to make it happen. I've got an 872a wrapped up in the closet, as well as a few 3B25's (believe those are Xenon?) that I bought for the HV supplies of some tube amps that I have (part of an electromechanical carillon).
I did build a night light out of a small VR tube that glows orange (from Neon possibly?). I still wouldn't mind trying it if I could get the items I need to make it happen. I've got an 872a wrapped up in the closet, as well as a few 3B25's (believe those are Xenon?) that I bought for the HV supplies of some tube amps that I have (part of an electromechanical carillon).
An interesting thread on MV tubes. Makes me want to learn more. In any case, seems to have some good advice for anyone who does choose to use MV tubes like the 866A.
http://www.audioasylum.com/scripts/t.pl?f=DIYHiFi&m=572
In case you haven't seen it.
Carl
http://www.audioasylum.com/scripts/t.pl?f=DIYHiFi&m=572
In case you haven't seen it.
Carl
With the voltages used in our audio work, X-rays are of no concern. Even with levels of 1500 or 2000 volts. At around 10KV soft X-rays will start to be produced. These are just what they are called...soft, with little power to penetrate. Hard X-rays begin around 25KV and require some form of protection like leaded glass (as in TV CRTs) or external shielding. MV rectifiers eschew the use of copper in their construction to help prevent X-rays.
Victor
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