|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
89.25.40.89
In Reply to: RE: My 3 years to the goal of the non-compromise SET and still learning.. posted by TubeDriver on August 22, 2016 at 11:39:46
The first monoblock is already running. I made the addition of making a simple fixed bias. The output tube is dissipating 45W on the plate. Don't be scared, it's a sturdy tube. I've ran a pair for a year without any signs of noticeable deterioration. I have a few friends who have ran it even at 55W. I cannot guarantee the same for a western EL519 though.
It is apparent that the plate glows on one side only. This is due to structural inside asymmetry. A perfect tube will share an even redness on both anode sides. Unfortunately, when I tried matching tubes by this criteria, only 2 from 20 did it.
Follow Ups:
Thanksfully, only two tubes red plate out of 20 tubes. Some tube may red plate (even a little) due to the a little more sensitive grid voltage or some kind of shorts or leakage between elements.
Are you using those tubes with the redness on the plate? I think it's called a red plating!
And no, you don't want to match tubes with the color of the redness on the plate!
.
.
.Thou shall not stand where I type for I carry a bottle of Certified Audiophile Air and a Pure Silver Whip.
You did not understand my point. All 20 tubes red plated, but only 2 of them did it symmetrically.
Currently, I'm using it with the little red plating. This is a tube that doesn't mind it, deducing it by my own and the experience of others.
Yes, I did not understand before but now I do! You are one lucky guy to find all 20 tubes that will red plate at "normal operating condition" or you are pushing the tubes too hard so all of them are red plating.
What's so desirable about the sonic quality of the red plated tubes other than being somewhat useful in the Class C/D/E transmitters?
.
.
.Thou shall not stand where I type for I carry a bottle of Certified Audiophile Air and a Pure Silver Whip.
I'm pushing the tube a bit harder because the temptation for more power, the pushing of a tube in a more linear region and the lack of possibility to lower B+.
Regards,
Alexander.
Updates??
Well, at least they are a lot cheaper than most triode output tubes!
The truth is, each time I go to a radio flea market, I get some at the cost of cents. I've gathered nearly 30 pcs.
Regards,
Alexander.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: