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Old 5th January 2008, 04:06 PM   #11
yamaha is offline yamaha  United Kingdom
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If the 6dj8 does not work at 12v, how come musical fidelity use the 6dj8/6922/ecc88 family in there head-amp and phono amps?

These seem to have good reviews and are generally well recieved
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Old 5th January 2008, 05:37 PM   #12
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What do you store your media on?
If you have a PC in the mix, you have available to you all the software that top recording artist use. This includes many tube preamps simulators. Top quality sound.

Or you can take LTspice and construct a tube preamp and send wave files through it to see what different preamp configs will sound like.
http://digilander.libero.it/paeng/spice_tube_links.htm
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Old 5th January 2008, 10:36 PM   #13
OzMikeH is offline OzMikeH  Australia
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Quote:
Originally posted by yamaha
If the 6dj8 does not work at 12v, how come musical fidelity use the 6dj8/6922/ecc88 family in there head-amp and phono amps?

These seem to have good reviews and are generally well recieved
I'm far from an expert on vacuum tubes but I have been investigating a tube buffer at the front end of my active XO/amp.

Good reviews and generally well received does not always mean they sound good. they might just be overly "warm and tubey" or just trendy. (You know that 4 letter Brand who sells the little cube speakers?) On the other hand maybe they do sound good.

Using any device that far out of it's specs is very risky. It's like using a Subwoofer driver as a midrange.
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Old 6th January 2008, 02:59 PM   #14
amsci99 is offline amsci99  Singapore
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Quote:
Originally posted by planet10


Tell us more.

dave
Here it is,

http://gadgets.boingboing.net/2007/1...er-kit-fr.html
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Old 7th January 2008, 01:39 AM   #15
zacster is offline zacster  United States
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It is possible to run a 6DJ8 at low voltage. Better though is the 6GM8 which is an almost identical tube designed to run off car batteries. 12v is still pretty low, I run my Aikido at 24v with 4 6GM8s, the 4 heaters run at 6v in series which equals 24v also so I use a single power supply for both plate and filament.
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Old 7th January 2008, 02:32 AM   #16
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Quote:
Originally posted by amsci99
Here it is,
Thanx

dave
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community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
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Old 9th February 2008, 02:51 PM   #17
Fossil is offline Fossil  Singapore
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Quote:
Originally posted by yamaha
If the 6dj8 does not work at 12v, how come musical fidelity use the 6dj8/6922/ecc88 family in there head-amp and phono amps?

These seem to have good reviews and are generally well recieved
it's not 12Vdc but 12Vac. A voltage multiplier is on the pcb to bring it to around +/-35Vdc.




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