Any updates?

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PeterCapo

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Any updates?
« on: 10 May 2022, 05:18 pm »
Greetings,

Been watching for the availability of the Ultravalve - hope the parts shortages end up being temporary.  Also wondering about the status of the solid-state and hybrid power amplifiers that haven’t been available for a while.  The listing for the Vision SET 400 mentions new chassis-work and a reintroduction by mid-April 2022… 

Updates on any of the above?

Thanks.
Peter
« Last Edit: 11 May 2022, 12:10 am by PeterCapo »

avahifi

Re: Any updates?
« Reply #1 on: 11 May 2022, 01:38 pm »
Since transformers and vacuum tubes for the Ultravalve remain unavailable, there is no plans for offering this amp again any time soon.

Regarding the new SET 500 amplifier, the pesky details of getting the chassis metal perfect has taken far longer then we anticipated, its announcement day is pushed back a couple more months.

It will be worth the wait.

Frank

gryphongryph

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Re: Any updates?
« Reply #2 on: 11 May 2022, 02:46 pm »
Will the SET 500 be the same design inside? But with new chassis?
Or will you make design changes inside also ?
Thanks!

danielgk

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  • AVA engineer/technicion
Re: Any updates?
« Reply #3 on: 11 May 2022, 06:11 pm »
SET500 - no design changes, but
1)  soft start power supply board (which has been in the SET400 for almost a year now) allows higher output power, 200--> 250 wpc.
2)  plastic TO3-P Exicon mosfet transistors rather than the metal can TO-3 package which is  more expensive and possibly soon to be discontinued (as many transistors that use to offer TO-3 don't anymore) .
3)  new style chassis increases cooling capacity by a substantial amount.


Dan

gryphongryph

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Re: Any updates?
« Reply #4 on: 11 May 2022, 06:14 pm »
Thanks

Komoyuki

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Re: Any updates?
« Reply #5 on: 13 May 2022, 07:43 pm »
SET 500 then seems like an update from the SET400 which has been a beast in my system for about a year now. I guess a real upgrade would be those M225 monoblock  :icon_twisted:

avahifi

Re: Any updates?
« Reply #6 on: 13 May 2022, 11:31 pm »
Actually the.internal layout is new with much shorter signal paths.  It looks much like the M225 but scaled up to 17” wide, 5.5” high, and about 12” deep.  Heat sinks the full width and height of the sides.  Layout allows much better access to connections. Weight about 40 pounds. Much easier to build and service.

All the new metal parts will go to the fabricators next week. Top, bottom, back, inner front panel, and faceplate. Heatsinks being fabricated right now.

Frank

aln

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Re: Any updates?
« Reply #7 on: 14 May 2022, 11:09 am »
What about the FET-valve designs?

avahifi

Re: Any updates?
« Reply #8 on: 14 May 2022, 07:33 pm »
Our tube hybrid power amps will take a lot more work to adapt into our new big chassis layout. Remember that our SET designs are scale invariant, so scaling them up and moving parts around to fit the much improved layout was pretty easy for me. We have had the new upscaled circuit boards finished and running for some time now, totally bug free.

My EE suggests that since the Fet Valve amps are our oldest current designs, it’s time for a complete new design rather just fitting the current design into a drastically new layout. Given the current unavailability of reasonably priced vacuum tubes, this plan is on hold until we find out if the unavailability of tubes is just a short term issue.

Frank

aln

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Keep us posted!
« Reply #9 on: 14 May 2022, 07:58 pm »
It may be time to raid the retirement fund.

wgallupe

Re: Any updates?
« Reply #10 on: Today at 02:40 pm »
Are there any plans for a power amp that fits (output power wise) in between the 60wpc SET 120 and the forthcoming SET 500?