@ Mulveling, Its about time someone tells
It eaxtaly as needs be siad
*basic AU suck* including the Holy graisl,,,note even Siemens/Teles AU's can be had pretty cheap.
Its the AX's which go for GOLD.
Yes there are at least 2 or 3 other tubes can be ub for the AU;'s.
@
noromance
Great find, well done my friend, backs up some of my findings on the E80CC.
I have to disagree in part,, yet agree in other ideas made from this 2000 post on Audioasylum
*The E80CC projects a very odd sound stage,,,~~~indeed it does~~~which gives a MUCH LARGER THAN LIFE SOUNDSTAGE~~~ Indeed.
My defy was dead, and could not sing due to the Class D chinese clone jadis preamp,,,with the employment of the E80CC, the jadis came to life, though still at Class B/C fq resolution..Still, thats better than the Class C/D fq resolution with the AU's employed.
~~~~VERY VERY HIFI SOUNDING~~~ The E80CC is High Fidelighy.
The AU is Low Fidelity = Class C tube. The E80CC is a a Class A design.
The author goes on to say
~~~ we need futher testing to make a complete testing vs the AU..~~~
lastly he suggests that his questioner, just avoid the E80CC and stick with
~~The old tried and true~~
AU.
Based on my testing, the E80CC is The King of all AU's, while all others/Siemens/Teles are mere rogues in comparison.
Now i am on to discovering the
~~King of all AX's~~~
which i do believe have found in the
,,well the Valve Museum does not list a
12bz7
does list its cousin
The 12BH7A
The build of this 12BZ7 looks identical to the AX design, except a taller version...
http://www.r-type.org/exhib/aaa1764.htm
The 12bz7's go cheap on ebay,,now after my testing and following up witha YT vid, that market price might jump.
Note how mucha single Philips mini watt E80 got today on ebay,,~~$150~~!!!
lsiting says, pinch waist/D ring,,= pure snakeoil.
A E80CC is a E80CC is a E80CC. The Siemens did, if memory serves me, makea miniscule pop in fq resolution,,,yet i need to makea further testing vs the Philips E80, maybe tomorrow.
The author in the above Audioasylum mentioned the Philips was superior to Tungstrum,,,which i might also believe is true. But as i say, the pop is so miniscule, its reallya matter of what you are willing to pay.
A system which lacks the sensitivity to pick up the added fq resolution of the Siemens, may do equally as well just to grab any E80CC.
As I say, in order fora Class A tube to operate in
~~~pure class A~~~ resolution, the system has to possess ~~Class A sensitivity~~.
My preamp is Class D, The Cayin Class A/B The Thors Class A/B , thus the Lite LS9 pre(Class D) drags the entire Class A/B system down to class B/C.
Yet in spite of this drag on the resolution, the Defy with its Class A build, does quite well at registering the incredible life offered by the sublime E80CC.
I've got my work cut out over the next 6 months, and slowly but surely hope to acheieve Class A/B resolution by mid summer.
In 2021 I hope to achieve
Pure Class A Resolution of fq's.
