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Old 3rd November 2011, 03:48 PM   #381
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by buzzforb View Post
...... and have FE separate in module with connection to both amp and psi.
that will be very fine too

but if having other amps, like say tube mono power amps, it will be harder to change amps

in that sense you are right that it depends on individual setup

you could ofcourse design power buffer tube amps, using the BA3 frontend as preamp/driver too
I have thought about that, but.....a bit too special

anyone know of a good balanced digital/chip controller/attennuator ?
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Old 3rd November 2011, 03:59 PM   #382
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I have made several tube FE's.
With e.g. an output tube like KT66 in triode. Man that was a fat sound.
Or 6SN7 stacked.
Bad thing: I had it integrated so threw things away all the time. I like the new 'mod game'.

Quote:
anyone know of a good balanced digital/chip controller/attenuator ?
I am thinking of the miniDSP. Would be fun.
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Old 3rd November 2011, 05:54 PM   #383
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Quote:
Originally Posted by tinitus View Post
anyone know of a good balanced digital/chip controller/attennuator ?
Short of building your own, I think that's an oxymoron...

Roscoe
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Old 3rd November 2011, 07:11 PM   #384
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Default trim pots

I just want to make sure I'm ordering the right pieces. What
is the appropriate wattage rating, and are there preferred peices?

thanks,

Skip Pack
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Old 3rd November 2011, 10:00 PM   #385
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Originally Posted by buzzforb View Post
I would do what I have suggested and will be doing personally. Put output board and bias boards in main case with Psi and have FE separate in module with connection to both amp and psi.
not too late to change my mind about this


Skip Pack, I think its 0,5watt Bourns or Wishay, but watch leg configuration on the board


.
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Old 3rd November 2011, 10:44 PM   #386
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Quote:
Originally Posted by Skip Pack View Post
I just want to make sure I'm ordering the right pieces. What
is the appropriate wattage rating, and are there preferred peices?

thanks,

Skip Pack
ok, looking at the board
it seems like Nelson have made sure that almost all kinds of this trim pot type can be used
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Old 3rd November 2011, 11:50 PM   #387
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Quote:
Originally Posted by tinitus View Post
not too late to change my mind about this


Skip Pack, I think its 0,5watt Bourns or Wishay, but watch leg configuration on the board


.
Great thing about setup provided by Nelson is that you can run any decent pre-amp into the BA output stage. You can set it up to run off output PSU or it can have its own special setup. Aa Triode AL said, this does away with the constant re-integration of new ideas. PLug and PLay. This may not be the purist route taken in some of his FW stuff, but it does afford great flexibility. For me it is an experiment in sound. I hope to learn an identify different types of musical reproduction and the associated topology and hopefully make a decision about what my finally will be. Then again, I could just keep them all
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Old 4th November 2011, 12:12 AM   #388
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Originally Posted by buzzforb View Post
Great thing about setup provided by Nelson is that you can run any decent pre-amp into the BA output stage.
you still need a preamp with good gain, but yes

isn't it 30db fore the BA3 frontend ?

I don't know BA-2 input impedance ?
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Old 4th November 2011, 02:46 AM   #389
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Thanks for the reply Tinitus,

Looking at the stockage quantities at Digikey and Mouser suggests that
Murata is the standard choice in .25W parts. I'll use those unless I hear
some horror stories.

Skip
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Old 4th November 2011, 03:35 AM   #390
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no 0.5watt trim pots ?
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