Rank: Member
Groups: Member
Joined: 9/2/2009(UTC)
Posts: 8
Location: Italy
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I saw the Buffalo24 on Twisted Pear Parts Bin and i suddenly orederd one. I received it and i have to say that it's a really well done piece of electronics, thanks to Brian and Russ. I always am very eager so to have quickly something playing i built a PSU with two lm317 and all that i had in my home so i get 5.9 VDC for VD and 6.9 VDC for VA. For now i don't have an I/V stage and so i connected the buffalo out to the primary of a 1:1 (600ohm:600ohm) transformer (monacor ltr-110) with a load of 10Kohm on the secondary and from there the rca out to my pre (opa2134 buffer + pga2310). I really like the reults of this preliminary implementation (in terms of sound quality). I also have an unpopulated ivy board with only the opamp soldered and when i found the right components i can make a comparison. I would like to ask to Russ and Brian (and to anyone who want to answer) two questions: 1) are the values for VD and VA OK even if different from the recommended ones? 2) keeping this transformer output stage (i know that you consider this a suboptimal solution) are there some better way to couple it to the buffalo (a better impedance matching on the primary and/or secondary) Here the same post on diyaudio with photo. Ciao Andrea
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Rank: Member
Groups: Member
Joined: 6/30/2008(UTC)
Posts: 12
Location: South Worcestershire, UK
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I am sure the voltages will be OK; there are onboard regulators which take things down to the target voltages.
Your transformer approach should be fine, if the transformer primary is connected between the + and - outputs. Don't connect from say + to ground, otherwise lots of DC flows in the winding, probably saturating the transformer.
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Rank: Administration
Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 3,979
Location: Nashville, TN
Thanks: 25 times
Was thanked: 89 time(s) in 83 post(s)
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PD once again is spot on with his advice. Thanks!
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