Sam Tellig (from Stereophile) bought one of these from me back in August and has made positive mention of it as the "Mystery Preamp" in column "Sam's Space" in the November issue, and the full write up will be in the December issue.
If the write up was as enthusiastic as his email to me about how it sounded back in August, it may inspire those Stereophile devotee's to then make their own Lightspeed Attenuator.
Cheers George
If the write up was as enthusiastic as his email to me about how it sounded back in August, it may inspire those Stereophile devotee's to then make their own Lightspeed Attenuator.
Cheers George
Attachments
Congratulations George! I cant wait to read it. Hopefully you will post some of it here or let us know if you have a link.
Thats really a great step and you certainly deserve some attention from the 'audiophile' world.
Uriah
Thats really a great step and you certainly deserve some attention from the 'audiophile' world.
Uriah
I cannot reprint or quote any part as yet, they don't allow
reviews to be quoted in Stereophile until the issue that follows the one
in which the review is published.
So that means the parts in the December and January, I cannot quote copy or post till at least February. So you'll just have to purchase or read them in the magazine, don't blame them it's taking issue sales away from them if they didn't do this.
Cheers George
reviews to be quoted in Stereophile until the issue that follows the one
in which the review is published.
So that means the parts in the December and January, I cannot quote copy or post till at least February. So you'll just have to purchase or read them in the magazine, don't blame them it's taking issue sales away from them if they didn't do this.
Cheers George
Lightspeed attenuator
Interesting idea.
A number of years ago I designed an amp for another application that used matched photo-mos couplers. The two couplers in a matched pair were operated in a master/slave servo arrangement that canceled out any nonlinearities in the couplers' transfer function. Using this servo topology it should be possible to slave two or more pairs to a single log taper potentiometer. That would make the choice of the potentiometer easier. Another approach would be to employ a circuit that converts from linear to log and use a linear potentiometer. This could be done either digitally or via analog techniques.
JCM
Interesting idea.
A number of years ago I designed an amp for another application that used matched photo-mos couplers. The two couplers in a matched pair were operated in a master/slave servo arrangement that canceled out any nonlinearities in the couplers' transfer function. Using this servo topology it should be possible to slave two or more pairs to a single log taper potentiometer. That would make the choice of the potentiometer easier. Another approach would be to employ a circuit that converts from linear to log and use a linear potentiometer. This could be done either digitally or via analog techniques.
JCM
Sorry guys false alarm, the main article by Sam Tellig is now postponed till the February issue, too much Xmas cheer over the break maybe.
Cheers George
My copy actually arrived in my postbox this morning, but didn't get to open it yet..... so I'll wait for next issue now...
Fran
Fran
Hi guys, I've just been sent an email from a customer in the US, the Lightspeed Attenuator article by Sam Tellig is now available in the February issue, he said it is a very favorable review, and it seems so by the 56 pricing/shipping emails in one day I received.
Cheers George
Cheers George
! WOW !
Nice 🙂
It was a really good review. Do you have it yet George? I can email it to you if you like. Someone emailed it a few days ago to me.
He went on and on about how much he loved his Halcyon but they make it no longer and how relieved he was to find that your Lightspeed was a wonderful replacement for it.
Nice job.
Uriah
Nice 🙂
It was a really good review. Do you have it yet George? I can email it to you if you like. Someone emailed it a few days ago to me.
He went on and on about how much he loved his Halcyon but they make it no longer and how relieved he was to find that your Lightspeed was a wonderful replacement for it.
Nice job.
Uriah
Thanks Uriah, I have an issue coming from a friend in Sydney when it arrives, I believe the Halcyon was maybe a MkI configuration as well (still better than any potentiometer) as nothing was matched, that's why he needed left and right volume controls (which are PITA to use) Sam's one died also, should have used Silonex LDR's, but they weren't around back then.
Cheers George
Cheers George
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I imagine he is much more happy with the Lightspeed. I had made one with two pots to control it and sure it worked but man everytime I set the volume I had to go sit down.. see if stereo image is centered, go back to the volume pot and adjust.... go back sit down, repeat.
Uriah
Uriah
George,
You have been so forthcoming with your invention here on DIY Audio I hope the future is extremely good to you with your commercial offerings. The Stereophile writeup is long overdo. Kudos, Damn good work. Thanks for all you have given us to date.
It really is a good attenuator clear, coherent, simple.
Tad
You have been so forthcoming with your invention here on DIY Audio I hope the future is extremely good to you with your commercial offerings. The Stereophile writeup is long overdo. Kudos, Damn good work. Thanks for all you have given us to date.
It really is a good attenuator clear, coherent, simple.
Tad
Just thought I'd let you proud owners know, that your Lightspeed Attenuator has just made it into 2010 April issue "Stereophile's Recommended Components" best of the best list, with the highest $$$ rating value for money.
Cheers George
Cheers George
Copyright laws forbid me from doing so.
Issues are downloadable on line if you don't what to buy a copy, but watch out for viruses.
Cheers George
Issues are downloadable on line if you don't what to buy a copy, but watch out for viruses.
Cheers George
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