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In Reply to: RE: Yet MORE conflict posted by pictureguy on July 11, 2021 at 12:44:41
Are you keeping your Maggies or still considering the Klipsch Forte?
You know the latter was recently upgraded to the IV? With the high efficiency that could simplify your amp needs, but I don't blame you for wanting to audition them first.
Regarding your rectifier question, this may be circuit specific (I don't know enough to say) but I'll offer it for thought. When my friend Jud had Joule Electra, in the early days he offered two similar line stages. The LA-100 was all tube while the LA-75 had SS rectification. Very few preferred the LA-75, saying it only worked well playing R&R. He soon discontinued that due to very low demand.
Anyway, good luck.
"The only cats worth anything are the cats who take chances. Sometimes I play things I never heard myself." Thelonious Monk
Follow Ups:
Yes.....100%.....Will I like the Forte IV enough to part with my panels?
And yes, again....My current amps, a PAIR of A23 Parasound is quite a bit of amp for such speakers.
I'm considering the VTA ST120, based on the Dynaco model with some meaningful improvements.
Better iron and more capacitance, as well as ability to run 6550 / KT88 and a few other output tubes.
If you were still in town, I'd ask you to join me for a trip to the nearest Klipsch Heritage dealer, maybe 80 miles to the north.....
Too much is never enough
Not all SS diodes are the same. Standard diode makes a lot of noise unlike a tube. Hexfred or CIS Schottky make little noise just like a tube. Yes, you can hear the difference.
I trust your opinion and enjoy reading your comments. So thanks for that.
Have you done, or know of any testing to see exactly what the REAL world effects are with various diodes in the PS. Are we talking about audible noise or some ringing in the 50kHz range?
Compared conventional diode to Hexfred and CIS Schottky. The Hexfred and CIS Schottky had a slightly, but noticeable quieter sound. All diodes feed extra large capacitors. If the caps were factory stock capacitance, the difference would have been larger.
I don't expect you to do it, but it would be interesting to see some scope tracings on an "average" stereo with and without low noise diodes. But who feels like taking that much time out of our week when we're talking about a difference of a few cents in diodes.
Conventual diode- 50 cents. Hexfred or CIS Schottky- $6.
I MANUFACTURED the HEXFRED while working for International Rectifier, prior to the sale to Infineon.It was a relitively quick process (number of steps).
It is or SHOULD be a commodity cheap product. 12x a conventional diode is ridiculous. The main
source of increase in cost is the EPITAXIAL Silicon used as start material....But each wafer held LOTS
of potential parts....And since the process was so simple, we got Very Good yield, indeed.
Don't let anyone tell you they are 'Expensive' to make or whatever. In-Fab yileds are high as are
probe yields. The MOST expensive part is the start wafer. We would start 'em 100 x 6" wafers at
a time. A single lot would yield THOUSANDS of parts. And require a fraction of the time and steps
used to make a MOSFET......or in our case.....a HEXFET device.
Too much is never enough
Edits: 07/28/21
I worked for a compamy that manufactued discrete devices.
I helped make more HEXFREDs than you could possily imagine.......
a 6" wafer held maybe 500 to 1000 usable die and each 'lot' was 100 wafers.
Being a simiple process, the yield was good......And resulted in what amounts to a commodity cheap product.
Too much is never enough
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