PX25 / KT66

If they glow, this is the place to be
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pre65
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#1 PX25 / KT66

Post by pre65 »

This should cause controversy. :lol:

Quote.

"The PX25 is directly heated and feeding the filament to minimise hum is not straight forward. Williamson, who worked for M-OV and then Ferranti, indicated that the modern indirectly heated KT66 when strapped as a triode was almost identical in performance to the PX25."
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Paul Barker
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#2

Post by Paul Barker »

My test results.

One of my KT66's

Image

One of my Balloon PX25's

Image

One of my 4P1Ls

Image

What the Chinese come up with when asked to make a PX25

Image
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ed
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#3 Re: PX25 / KT66

Post by ed »

pre65 wrote:This should cause controversy. :lol:

Quote.

"The PX25 is directly heated and feeding the filament to minimise hum is not straight forward. Williamson, who worked for M-OV and then Ferranti, indicated that the modern indirectly heated KT66 when strapped as a triode was almost identical in performance to the PX25."
would it be fair to say that it's only controversial if you substitute the word performance for 'sound quality'?
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IslandPink
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#4

Post by IslandPink »

Just what I was thinking .
Now - here's something someone should bring to Owston next time - a PSE 4P1L amp. I know Andy Evans ( on DIY Audio ) is very happy indeed with his one.
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pre65
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#5

Post by pre65 »

Funnily enough, I have 4 of those in a drawer somewhere. :)
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
Alex Kitic
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#6

Post by Alex Kitic »

Paul Barker wrote:
What the Chinese come up with when asked to make a PX25

Image
This may not look like a true PX25, but I like the curves.

I would enjoy playing with it.
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