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Old 19th November 2012, 05:53 PM   #11
TheGimp is online now TheGimp  United States
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I generally use an Alps stereo 100K pot on the input of my amps. With min at 7pm and max at 5pm, I rarely go above a noon setting when driven from my CD player or the FM stereo receiver.

Since I have yet to build a RIAA corrected record preamp, I am currently playing through the record preamp in the FM receiver.

If I ever finish setting up a HT system I suppose things may change.
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Old 19th November 2012, 06:22 PM   #12
tinitus is offline tinitus  Europe
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yes, you can do that with tube based poweramp

btw, a tube pre have always been known to have rolled off top, and sluggish lows, compared to SS preamps
and a SS design might be perceived as having slightly finer 'textures'
but the tighter bottom could at the same time be perceived as rahter thin, or boring
and regarding lack of 'substance', that could be where a tube design shines

everything could depend on your other electronics, and your speakers especially
ofcourse you can always design it all to match each other

and yeah, I do know you can design tubegear to sound no different from solid state
I have even heard of tube amps that sounded 'too much of bad solid state design'
seems like almost anything is possible

if you want to build a tube pre for fun, yeah, sure, why not
if your goal is 'better sound', it could be a different and more tricky affair
on the other hand, you still might have to build one to know for yourself
talk and wise words wont do it

so what's it gonna be ?
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Old 19th November 2012, 07:07 PM   #13
SY is offline SY  United States
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Quote:
Originally Posted by tinitus View Post
you are not using passive att pot, are you ?
Yes, but buffered, like I said. There's also a transformer for CMR. It is transparent, not an effects box. I need the buffer because of impedances and cable lengths- a 10k passive is usually fine for 90% of the world.
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Old 19th November 2012, 07:25 PM   #14
tinitus is offline tinitus  Europe
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if its actively buffered its not passive, is it ?

but yeah, passive can be very transparent
though, some people might think something is missing
could depend on a lot of other factors
personally, I also prefer transparancy, surely
but I also build my own speakers to match it

and since the OP is asking about it this way, my guess is its because he is missing 'something', whatever it is ? speaker BSC missing maybe, like it often happened in the old days ?
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Old 19th November 2012, 08:13 PM   #15
SY is offline SY  United States
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Well, again, if you want an effects box, play with guitar pedals, they're cheap and work well. No need to build expensive, high voltage stuff.
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Old 19th November 2012, 08:22 PM   #16
tinitus is offline tinitus  Europe
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effect pedal ? you must be joking
and no, I dont think they dont work so well at all, not even for playing music

but maybe you could use a PA eq
actually, it would also have a buffered volume control
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Old 19th November 2012, 08:26 PM   #17
SY is offline SY  United States
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Actually, I'm dead serious.
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Old 19th November 2012, 08:28 PM   #18
tinitus is offline tinitus  Europe
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hmm, how about electrically compensated BSC, like done with actice crossover (sometimes) ?

Quote:
Originally Posted by SY View Post
Actually, I'm dead serious.
maybe you mean like taking the buffer used in effects
actually you can find 'cable drivers' there as well
only needs a 9V battery
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Old 19th November 2012, 08:28 PM   #19
12B4A is offline 12B4A  United States
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I would imagine many people build tube preamps because it's a simple and inexpensive way of getting a start at building from scratch. My first three self-designed from-scratch builds were preamplifiers.
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Old 19th November 2012, 08:38 PM   #20
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by doors666 View Post
I am a total newbie to tubes and would like to make a tube preamp.

I dont need gain as I mainly use cd players and sound cards.

This is going to be mainly for my desktop system.

I already have a pass B1 for my other system.
so lets try ask doors666 now, why a tube pre ?
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