Marantz CD63 & CD67 mods list - Page 49

poynton · 2nd February 2006, 10:19 AM

is this a working prototype??

More details please......

SimontY · 2nd February 2006, 10:21 AM

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

Fidelity Audio · 2nd February 2006, 10:22 AM

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

6h5c · 2nd February 2006, 10:26 AM

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.

6h5c · 2nd February 2006, 10:27 AM

Temporary heater tranny.

My first impression: WOW!

SimontY · 2nd February 2006, 10:30 AM

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

poynton · 2nd February 2006, 10:30 AM

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??

poynton · 2nd February 2006, 10:31 AM

Quote:

Originally posted by SimontY

/hehe, I think I got there first

By a millisecond !!!!!!!!!!!

SimontY · 2nd February 2006, 10:32 AM

Quote:

Originally posted by poynton

By a millisecond !!!!!!!!!!!

Hahaha, had I been a second slower my post would've looked silly! lol

poynton · 2nd February 2006, 10:36 AM

Quote:

Originally posted by SimontY

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

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

2nd February 2006, 10:19 AM	#481
poynton Magneto the Gravity Man diyAudio Member Join Date: Mar 2005 Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)	... have you drilled holes in the top? .... is this a working prototype?? More details please......

2nd February 2006, 10:22 AM	#483
Fidelity Audio diyAudio Member Join Date: Dec 2005 Location: Doncaster England	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 __________________ Fidelity Audio - Home of quality products & upgrades - What HiFi 5 Star Headphone amp » Hifi World 5 Star Pre amp » HiFi Choice 5 Star Group test winner HPA-100

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