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In Reply to: RE: HK Citation II modern equivalent? posted by hahax@verizon.net on February 14, 2016 at 15:34:28
Without the very wide bandwidth Freed O/P "iron", Stu Hegeman's all pentode small signal circuitry can't "do its thing". A extremely necessary part of whole "Deuce" setup is missing. The defect is lethal.
Eli D.
Follow Ups:
The Cit.ii output iron is around 3k2 a-a. If you're going to build an amp to the Deuce's power output, with its B+ level, you're going to need comparable loading. When John Atwood tested output Iron, the Deuce and the W6m 16439 were the top of the heap in terms of bandwidth and power handling( across that bandwidth). The Dynaco Mk VI was nowhere near, even though it was lower in a-a loading. The MC amps are even lower in effective a-a load, but with their local FB thanks to evenly divided plate and cathode loading, are remarkably wide bandwidth considering their less complex interleave geometry.
If you're going to build an amp of that power/bandwidth, you're going to need an exceptional output trans. There is no way around it. IOW, there are no modern equivalents.
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
Thanks for sharing that.
In your experience; Are there any modern ttransformers that compare to the Citation II and Heathkit W-6?
Meat; It's the right thing to do. Romans 14:2
I guess transformer design and build reached its zenith 50 years ago.
Why?
Meat; It's the right thing to do. Romans 14:2
IF that's the (a) reason for shortcomings in new amps it doesn't make sense.
"Once this was all Black Plasma and Imagination" -Michael McClure
If the vaunted transformers of the McIntosh Mc60, Heathkit W6, Harman Kardon Citation II, and a few others are as good as everyone says they are (I believe they are); Then why the hell hasn't someone else been able to build a equivalent, or even better output transformer in the past 50 years?
As I stated in a earlier post, everything else in life has improved.
I'm trying to create a shit storm, but I would like to know the reason(s) for this.
Meat; It's the right thing to do. Romans 14:2
There are good, no excellent transformers out there. The myth of the "old" iron is just that - a myth.
Magnaquest and Hammand come to mind. Or Bob Latino who offers the ST-70 and ST-120 uses custom made BETTER transformers than the original dynacos.
The only reason you are not seeing good transformers in commercial/new offerings is price savings. And I really should also mention PS designs have improved. Off loading the heavy load placed on some trannies. But basically companies are trying to save a buck. Unfortunately good audio does require a pricey price tag.
Eli D.
Honestly don't know if the Chinese tried to copy the transformers too. I have heard the amps driving KEF Blades at Harry Weisfeld's sounding awfully good.
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