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GB for DC coupled B1 buffer with shunt PSUs

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#2,764
Hi Teabag et al,
I've done a search and found two spreadsheets, one at
https://spreadsheets.google.com/ccc?key=0AnAnd3RI56NmdFJPNGVjSzB1T2F6X1MwNlNDeHBDamc&hl=en#gid=0
and another
https://spreadsheets.google.com/ccc?key=0An3nVM43ZbQndHJSMVNSLVBwbVFUSEh5cXI3WnpDRnc&hl=en#

One has your name on it, but has a column for relays. I've also seen references to Takman resistor packs.

I'm after a dc buffer one a single ended, stereo channel, with the shunt reg psu and turn on delay. So do I need one Hypnotize or two ? Are any of the parts available in this GB, resistors, fets or relays ?

Sorry for these questions late in the GB day, but it is rather confusing as I haven't been following this thread for the last two years.

Perhaps a new thread should be started for new GB, which will make it easier for late entrants to find the relevant inforamtion ?

Thanks
fs
 
#2,765
firestorm, no problem.
The correct spreadsheet is attached to my signature.
Those are older versions.

There are no resistor packs this time or relays.
Ed Lafontaine has been offering matched LED's and may have relay's available.
There are also several people offering matched 2sk170's, such as Blues and Spencer.
Take a look at my blogs for info on the mesmerize, and the new larger hypnotize.
diyAudio - Tea-Bag
The hypnotize continues to be the most popular platform for this build.
 
#2,774
There are a few things worth noting.
The max width on the new hypnotize is 25mm for the 4700uf caps, and up 10mm with snap ins.
The 68R's are now 2x47 (4 total), or one can go much lower in 'hot rod mode' to 10R 5 watt or so, with really adequate heat sinking.
 
#2,775
Update,
I did order the boards during the Chinese New Year, so they will take a week or so longer to get here. They are going into production NEXT week. I apologize if I made promises to get your boards sooner.
 
Last edited:
#2,776
Good morning,

I´ve been trying to follow the thread for the last couple of weeks but got lost in the meantime.
I´d like to built the DC-coupled B1 too but I haven´t really understood what I have to order. The Hypno seems to be the latest version of the PCB - correct?
What´s the Mesmerize?
And apparently there is also the option of buying matched JFETs - correct?
I can supply a paypal account so paying shouldn´t be the problem.

I´d appreciate some explanation/advice.

Cheers,
Kai
 
#2,777
Hi Kai

Hypnotize is a DC coupled version of the B1 buffer that is optimized for hotroding ( run in higher current -ICCS- == better sound quality ) and offers no input selection ( which can be implemented by you )
Mesmerize on the other hand is a version that is not optimized for hotroding ( but can be hotroded with some modifications ) and offers input selection ( 6 inputs through relay on the board ).

Appart from that, the boards have no other difference.

Leds, relays, matched or unmatched fets are being offered by other members of this forum. You will find them in Swap Meet.

Cheers
Michael
 
#2,778
Hi Miachael,
thx for the quick reply- much appreciated.
Since I don´t need to switch between sources I would be fine either way without having to tweak anything.

Further on to my previous question I am wondering whether there is a way of setting the B1 up for symmetrical (XLR) in- and outputs.
I think this topic has already been discussed here but unfortunately I cannot find it here.

Thanks!

Cheers,
Kai
 
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