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Old 2nd February 2006, 09:19 AM   #481
poynton is offline poynton  United Kingdom
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Default ... have you drilled holes in the top? ....

is this a working prototype??

More details please......
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Old 2nd February 2006, 09:21 AM   #482
SimontY is offline SimontY  United Kingdom
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Quote:
Originally posted by 6h5c
Or.....try a tubestage!

Whooohoooo!!!!!

SOUNDSTAGE!

DYNAMICS!

EMOTION!

....MUSIC!
Oohh, niiice

Not for me tho, I'd probably kill myself with high voltage
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Old 2nd February 2006, 09:22 AM   #483
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I may try a OPA627 * 2 browndog just to see what it sounds like.

whooooooo just seen the tubes.

nice work my friend, I am very interested in this.

Tell us lots more please

mmmm
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Old 2nd February 2006, 09:26 AM   #484
6h5c is offline 6h5c  Netherlands
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This is the first attempt to get Thorstens Delta-Sigma circuit working and see what it does. So I mostly built it out of components I had laying around (especially notice the ugly blue ceramic suppression caps, since I didn't have 100n film caps...).

I used a piece of aluminium with two holes for the tubes and hardwired the circuit. I wired the passive filter on a piece of veroboard and connected it to the outputs of the DAC.

I have a HV tube PSU that I use for the supply to the circuit and used a small PCB tranny for the heater voltage. In the end I want to mount the tubes horizontally and fit everything in the player.

Ray.
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Old 2nd February 2006, 09:27 AM   #485
6h5c is offline 6h5c  Netherlands
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Temporary heater tranny.

My first impression: WOW!
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Old 2nd February 2006, 09:30 AM   #486
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Quote:
Originally posted by 6h5c
I have a HV tube PSU that I use for the supply to the circuit..
You'll never fit *that* psu in *that* cd player!

/hehe, I think I got there first

So, err, is it all like tubey distortion, or is it just 'correct'? I've never heard tubes
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Old 2nd February 2006, 09:30 AM   #487
poynton is offline poynton  United Kingdom
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Quote:
In the end I want to mount the tubes horizontally and fit everything in the player.

I don't think the big bit on the right will fit the standard case!

Is this a copy of the Thorstens circuit or have you changed it at all??
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Old 2nd February 2006, 09:31 AM   #488
poynton is offline poynton  United Kingdom
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Quote:
Originally posted by SimontY




/hehe, I think I got there first

By a millisecond !!!!!!!!!!!
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Old 2nd February 2006, 09:32 AM   #489
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Quote:
Originally posted by poynton

By a millisecond !!!!!!!!!!!
Hahaha, had I been a second slower my post would've looked silly! lol
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Old 2nd February 2006, 09:36 AM   #490
poynton is offline poynton  United Kingdom
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Quote:
Originally posted by SimontY

............ I'd probably kill myself with high voltage .....

.....Part of the fun of working with valves...... Have a go !!!!!


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