The first production UltraValve tube power amplifier

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avahifi_lj

Hello:

Here is a picture of the first "production" UltraValve amplifier.  Actually it's the second UltraValve built using all the final parts -- Frank built and kept the first one  :D

It sure looks nice powered up in a darkened room!

Larry





Wayner

Re: The first production UltraValve tube power amplifier
« Reply #1 on: 18 Jan 2010, 12:23 am »
Thanks Larry! It sure looks swell.

Wayner  :D

oneinthepipe

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Re: The first production UltraValve tube power amplifier
« Reply #2 on: 18 Jan 2010, 01:16 am »
That's gorgeous! 

martyo

Re: The first production UltraValve tube power amplifier
« Reply #3 on: 18 Jan 2010, 01:19 am »
Very nice!

pardales

Re: The first production UltraValve tube power amplifier
« Reply #4 on: 18 Jan 2010, 01:31 am »
Beautiful!  :drool: :thumb:

jtwrace

Re: The first production UltraValve tube power amplifier
« Reply #5 on: 18 Jan 2010, 01:32 am »
I echo all the above...

Toka

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Re: The first production UltraValve tube power amplifier
« Reply #6 on: 18 Jan 2010, 03:11 am »
Wow, looks great!  :drool:

rajacat

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Re: The first production UltraValve tube power amplifier
« Reply #7 on: 18 Jan 2010, 03:15 am »
I like the naked trannys.  :thumb: No chrome covers please!

The chrome top is excellent for reflecting the tube light though. :wink:



-Roy

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dB Cooper

Re: The first production UltraValve tube power amplifier
« Reply #8 on: 18 Jan 2010, 04:48 am »
 :drool: :drool: :drool: :drool: :drool: :drool: :drool: :drool: :drool: :drool: :drool: :drool:

trebejo

Re: The first production UltraValve tube power amplifier
« Reply #9 on: 18 Jan 2010, 05:00 am »
Oh, that is so pretty!

Any chance of seeing a picture of the innards?  :wink:

avahifi

Re: The first production UltraValve tube power amplifier
« Reply #10 on: 18 Jan 2010, 12:12 pm »
The chassis is not chrome plated.  it is highly polished stainless steel.  The faceplate is double anodized light gold made in USA aluminum as is the complete unit.  Many foreign aluminum alloys don't meet spec and end up with mottled finish results.

Regards,

Frank Van Alstine

Wayner

Re: The first production UltraValve tube power amplifier
« Reply #11 on: 18 Jan 2010, 01:47 pm »
Some neat new physical features of the new Ultravalve include new test lead receptacles for bias adjustment. These black and red receptacles will accept standard test probe pins on a volt ohm meter.

In the back of the amplifier, we have placed the common, 4, 8 and 16 ohm speaker jacks in a geometrical configuration so that a double banana jack can be used with any combination:

   (       8       )
   (    4 c 16   )  (this may not be the exact order, but you get the idea).

Wayner  :D

robinje

Re: The first production UltraValve tube power amplifier
« Reply #12 on: 18 Jan 2010, 07:07 pm »
That sure is a nice looking amp.  I bet it sounds great, too!   :green:

mmurt

Re: The first production UltraValve tube power amplifier
« Reply #13 on: 19 Jan 2010, 11:36 pm »
soooooooooo what's the lead time on these babies?

avahifi

Re: The first production UltraValve tube power amplifier
« Reply #14 on: 20 Jan 2010, 12:13 am »
We are building and shipping the new Ultravalve amplifiers right now.

The lead time is about 30 days from time of order as we are running busy.  Note that we do not charge your credit card until we are ready to ship.

Best regards,

Frank Van Alstine

satfrat

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Re: The first production UltraValve tube power amplifier
« Reply #15 on: 20 Jan 2010, 01:43 am »
Frank, has the UltraValve amp been added to your website yet? If not, maybe you could post the spec details here? Thanks.
 
Cheers,
Robin

PeterCapo

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Re: The first production UltraValve tube power amplifier
« Reply #16 on: 20 Jan 2010, 04:40 am »
Congratulations, Frank, it’s a real beauty!

Which transformers are those, exactly?  Triode?  Dynakitparts?  Hammond?  Do you screen output transformers and pick only ones that meet certain criteria?

Thank you.
Peter

avahifi

Re: The first production UltraValve tube power amplifier
« Reply #17 on: 20 Jan 2010, 01:17 pm »
The production transformers are made for us by Dynakitparts.  We have also tried Triode and Mangaquest transformers too with just fine musical results in testing.  Kevin at Dynakitparts has simply been great to work with and he is making the polished stainless steel chassis for us too.

With our circuits the small amount of residual very high frequency overshoot that sometimes is seen on some output transformers is gone.  It never was the transformer's fault, just less than perfect circuit design ahead of them.

The amp is supplied with National 6GH8A tubes, Sovtec 5AR4 tube, and matched quad sets of EH 6CA7 tubes at this time.  These have given us excellent reliability and performance.

Power output is about 35W per channel.  Noise is very low.  Bandwidth is down 3 db at 50K Hz and 5 Hz.

Obviously the amplifiers are carefully bench tested and go through a 24 hour burn in in my reference system before shipping.  Any issues with performance are of course put right before the amp goes out the door in our very special custom designed packaging material.

Regards,

Frank Van Alstine

salb203

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Re: The first production UltraValve tube power amplifier
« Reply #18 on: 23 Jan 2010, 02:53 am »
That sure is a nice looking amp Frank. If it sounds half as good as it looks, it will be a winner.

Regards,
Sal

satfrat

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Re: The first production UltraValve tube power amplifier
« Reply #19 on: 23 Jan 2010, 04:29 am »
That sure is a nice looking amp Frank. If it sounds half as good as it looks, it will be a winner.

Regards,
Sal

Gee Sal, I'd be hoping that it would sound twice as good as it looks myself.  :lol:
 
Cheers,
Robin