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In Reply to: RE: The old no hum no fun posted by drlowmu on November 09, 2015 at 08:49:42
Pics, or it didn't happen! ;>)
Follow Ups:
Got pictures for you. L1, 500 mHY Stancor C-2708 is at the top, below three ( white , gray, yellow) doubled-up wires running horizontally, 1 1/2 inch lead length to rectifier tube. L2 is green, mid-right side of chassis.Note my (1) extensive use of doubled-up wiring, (2) extensive film cap bypassing across every cap location, all done by my ear.
This 45 amp totally ROCKS on the A-4 ( full range, Kloss ) !! "Killed" the fella's Yamomoto A-08 last Sunday, it's wideband playing - EASILY plays an octave higher and lower, with color and HUGE dynamic range and finesse. Its in a different league.
Next time I do some more work at the A-4 site in KC, I'll take speaker photos for you. I am having A-4 owner totally rewire his A-4s, for maximum transfer efficiency. Those ALTEC 210 bass-horn enclosures weigh 440 pounds each, with no drivers in them
Jeff Medwin
Edits: 11/11/15 11/11/15
Curious, what is the output iron? Series or parallel feed?
Steve,I am proud to report the output transformers were NOTHING SPECIAL at all !!!
Recall, myself and a designer friend, a few years ago on this Forum, saying we could build a SET with a doorbell transformer output, and it will outperform all others?? This, in a way, is it.
Only I am using an INexpensive BUDGET SE output transformer, with a multiple primaries, as I recall, 2.5K, 3.5K and 5 K. Of course, 5K used for Type 45.
With my wiring and multiple value film cap bypassing EVERYWHERE, we easily play an ocatve higher and lower, with great tone, finesse, and dynamics, that puts that fancy Yamomoto C-Core ( ?? ) output transformer into an irrelevant status. Mr. Yamomoto-San would have possibly gone into cardiac arrest Steve, it would have shaken him up, but good.
THIS was FUN to hear and do !! Wow !!
Jeff Medwin
Edits: 11/12/15 11/12/15
nt
Here is a link to a Stereophile review of those amps.
The specs indicate full bandwidth , but the circuit is a lot different from the drlowmu amps.
Look up Jeff Day's " glowing " review from 6 Moons on the A-08. Likely, that review made the Kansas City ALTEC A-4 owner buy the A-08. He told me it was a "big" purchase for him.
Now he will sell it !!
Jeff Medwin
Jeff Day waxes lyrical about most equipment he "reviews" - I don't place value in his advertorial.The Yammy looks pretty, but does not set the bar particularly high. Reviewers have used the Yammy as an example of fine build quality (?!) - but it looks to me to be designed for simple construction and troubleshooting while looking organised... "agricultural".
Still, people praised it... before moving onto other designs. I am guessing the Yammy is an example of "impressive first impression versus long term enjoyment" type of contention.
Cheers,
91.
"Confusion of goals and perfection of means seems to characterise our age." Albert Einstein
Edits: 11/12/15
No, yammy 08 is really a good sounding amp with well defined voicing.The problem is in general 45 type FR amp has a very restricted usefulness due to lack of capable speaker systems. Do not forget that yamy costs $3k and Serious stereo $15k.
Agreed, it is pretty decent value
Cheers,
91.
"Confusion of goals and perfection of means seems to characterise our age." Albert Einstein
One of those Yamaha amps paid a visit. I don't think you were by during its stay, but it completely delivered the verdict that flea power is not for me.
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
No , I wouldn't expect you to fall for Yammy 08 considering what you have there BUT keeping things in perspective , what you have there would be in a range of $50k + If it were commercially available.
I thing it is a really nice, limited purpose weekend amp. It was a hit on the market and I assume there were many sold. Not that many resurface on used market and they tend to sell quickly if the price is right.
Hello,
Very well said. I agree with you.
Jeff Medwin
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