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Old 18th October 2013, 03:47 AM   #491
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Been happily listening to my BII for over a year now. I'm using the Feastrex transformers. Audio Nirvana no regrets. Very minimal design. My own design tube output buffer and outboard separate digital and anaol power supply.

JD
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Last edited by Jeffrey Davison; 18th October 2013 at 03:55 AM.
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Old 2nd November 2013, 07:50 AM   #492
Raj1 is offline Raj1  United Kingdom
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How much did the feastrex trannies cost?
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Old 2nd November 2013, 01:54 PM   #493
Bunpei is offline Bunpei  Japan
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Hi, Raj1!

As for the price of Finemet Core Line Transformers and its availabilities, please contact to Mr. Teramoto.
His address is;
teramotosp < at > gmail < dot > com

Bunpei
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Old 8th November 2013, 12:10 PM   #494
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Quote:
Originally Posted by Raj1 View Post
How much did the feastrex trannies cost?
They are selling on eBay for US$1030 a pair by the name of seller Fulken.
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Old 8th November 2013, 06:22 PM   #495
Raj1 is offline Raj1  United Kingdom
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Originally Posted by commstech View Post
They are selling on eBay for US$1030 a pair by the name of seller Fulken.
Thanks a lot!

-raja
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Old 31st January 2014, 12:25 AM   #496
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I am using the Buffalo IIISE dac with step-up transformers and forced current output into a simple tube output stage - and the sound is indeed excellent. I want to thank Joe Rasmussen for sharing his brilliant schematic with the diy-community and Mars2 for the inspiration.

A little tip on transformers for those on a tight budget: Raphaelite Sinovt PM30 7K Permalloy Step Up Transformer for MC Phono Pair | eBay
(I'm using them and they sound really nice)

Regards,
Vidar
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Old 31st January 2014, 02:03 AM   #497
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Quote:
Originally Posted by Vbenonisen View Post
Raphaelite Sinovt PM30 7K Permalloy Step Up Transformer for MC Phono Pair | eBay
(I'm using them and they sound really nice)

Regards,
Vidar
Hi Vidar

The link didn't work for me. But I did Google it and somebody sells them on ebay:

Raphaelite Sinovt PM30 7K Permalloy Step Up Transformer for MC Phono Pair | eBay

How adventurous do you feel?

Do you have access to a scope and a disk or files (if you play back files) with 1KHz sine wave and 20KHz sine wave?

I can post some files which you can use - or burn onto a disk, but you will need a scope - or a very flat to 20KHz True RMS AC Meter would also do.

What I am about to ask you to do has been disputed by a number of people, but only because they are only armchair critics saying "how can that make any difference" and yet many have now heard it - and one even dubbed it the 'Rasmussen Effect' and then it got really heated, so much that I had to ask the Moderator to step in.

So what am I talking about. Well, this has also been tried by somebody I asked to do it, in Malaysia, to a Buffalo DAC, also with transformers. So you won't be the first to do it to a transformer/Sabre combination - but hopefully you will like it just as much.

Play 1KHz sine wave and note the level on the scope. Now play the 20KHz sine wave and chances are that it will be level or slightly down relative to 1KHz.

This is where it gets interesting - add a single film capacitor across the output of the Sabre DAC. Adjust this cap - or use a combination of parallel caps, to bring the response down 0.85 (85%) at 20KHz relative to the ariginal level you established at 1KHz. Follow?

The response should be down between -1.3dB to -1.5dB at 20KHz.

In fact 0.85 should give you -1.4dB.

Those who have heard the effect have described as "not even subtle" and also as "very obvious" - but I would like to hear from you and your choice of words to describe it.

What I will say is this, it may sound like we are slowing down things - limiting rise time means it has to be slower, but in fact, other have noted the exact opposite. The sound will in fact be faster and may I say, and no more, also cleaner.

It has been blind tested.

So are you game?

Cheers, Joe
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Last edited by Joe Rasmussen; 31st January 2014 at 02:05 AM.
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Old 31st January 2014, 04:02 AM   #498
GaryB is offline GaryB  United States
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Or try this link Raphaelite Step Up Transformer
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Old 31st January 2014, 01:35 PM   #499
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The Vanderveen MC-10 step up transformer also looks like a good choice and is not very expensive (72€).
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Old 31st January 2014, 03:45 PM   #500
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Quote:
So are you game?

First of all - sorry for the "missing link". Yes I'm indeed game but I'm afraid I don't have any scope and I'm still learning how to use all the functions of my Fluke 287. Maybe it works so please post files. I'm travelling at the moment so I have to come back to you on this experiment. But anyways I need some general guidelines to the capacitor size, brand and such.
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