Mezmerize B1 Buffer Preamp - Page 3 - diyAudio
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Old 13th November 2013, 08:22 PM   #21
tommy_o is offline tommy_o  United States
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Quote:
Originally Posted by Salas View Post
I don't think there is such a thing. Newark and Mouser, a beer, and an hour of browsing their parts stock should do the trick.
Salas, can you suggest a replacement for the relay part numbers in the BOM? The ones listed are no longer available (from Digikey or Newark) and I frankly don't have enough experience with relays to pick a correct part.

Thanks!
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Old 14th November 2013, 12:33 AM   #22
Salas is online now Salas  Greece
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NEC EA2-12NJ
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Old 13th January 2014, 09:12 PM   #23
sibbeli is offline sibbeli  Sweden
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is it possible to "hot rod" thé Mezmerize also?

I wonder as it seems that thé hot rodding really makes difference.

I need atleast 4 different inputs and something that is complete with build guide as a preamp, and thé mezmerize seems to be really good.

Just hoping it's possible to hot rod it too..
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Old 13th January 2014, 09:45 PM   #24
Salas is online now Salas  Greece
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For down to 8.2R 3W per side setting resistors and circa 200mA will hold for reliability and rectification/filtering capacity as built standard. A 50VA 15+15VAc Tx will suffice. Keep the bridge diodes bit off board for air to can move around them.
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Old 14th January 2014, 02:36 PM   #25
Turbon is offline Turbon  Sweden
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Quote:
Originally Posted by Salas View Post
For down to 8.2R 3W per side setting resistors and circa 200mA will hold for reliability and rectification/filtering capacity as built standard. A 50VA 15+15VAc Tx will suffice. Keep the bridge diodes bit off board for air to can move around them.
So that would be enough for hot rodding the mezmerize?
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Old 14th January 2014, 03:40 PM   #26
Salas is online now Salas  Greece
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So that would be enough for hot rodding the mezmerize?
Yes, more it would stress it enough. When going for more than 0.2A on the specific board it needs TO-220s botch job, leg trick, more uF in the filters, a drag. When from 60mA to 200mA there is an appreciable difference already that should satisfy.
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Old 21st January 2014, 06:34 AM   #27
Turbon is offline Turbon  Sweden
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In the bom you referensed the b1 build when deciding on the value of the pot.
Now, we have 6 inputs and the simplistic phono will be one that will be connected.
What value do you recommend that fits this and the rest of my stuff (dacs, tuners and cd players)?

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Old 21st January 2014, 10:42 AM   #28
Turbon is offline Turbon  Sweden
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Obviously you cannot promise anything about my other stuff but the simplistic .
My fear is that optimizing for one may make things worse for the others.

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Old 21st January 2014, 10:46 AM   #29
AndrewT is offline AndrewT  Scotland
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Each Source can be separate and quite different.
They are each selected individually by the Input Selector Switch.

If some have a low output voltage compared to your normal Source, then look at adding a gain stage for those low level Sources only.
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Old 21st January 2014, 10:51 AM   #30
Salas is online now Salas  Greece
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The FS has a B1 style AC coupled buffer integrated as output stage so it will drive a 20K DCB1 pot with no problems.
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