RCruz said:
It's a mm phono stage lee and myself are building for a new TT manufacturer entering the market this year - PROTOTYPE HERE
The stage will have a Burson discrete fet opamp, Spower regulation, ZA & various mundorf.
Lee compared our development one to his own discrete stage and until he used some Russian military spec caps it beat it iirc
p.s I have found the Burson discrete opamp to match any dos in sound quality (providing both have equal quality caps, resistors & regulation around them). They really are that good!
Brent
LOL - they are good. Simon is saving up for some in his philips 650 after testing some at my work.
The bearing is a custom jobby. Some guys in a small unit that build locomotive engines for large scale models apparently. Holding it in the hand with no oil and only the lower platter you can spin it gentley and it keeps spinning for minutes. With the plater it seems to spin forever. I have also built the psu for this deck, it's a simple ac motor drive cct.
Lee has seen the bearing also
Brent
The bearing is a custom jobby. Some guys in a small unit that build locomotive engines for large scale models apparently. Holding it in the hand with no oil and only the lower platter you can spin it gentley and it keeps spinning for minutes. With the plater it seems to spin forever. I have also built the psu for this deck, it's a simple ac motor drive cct.
Lee has seen the bearing also
Brent
Yeah, that bearing is a proper precision job. The TT should sound awesome, and looks awesome too.
It'll be interesting to hear it working, and to see how much you have to mod a cd63 to get close to it. My very basic TT setup sounds very good indeed, it takes a surprisingly large amount of work to make cd rival even a half-decent TT.
Cheers, Lee.
It'll be interesting to hear it working, and to see how much you have to mod a cd63 to get close to it. My very basic TT setup sounds very good indeed, it takes a surprisingly large amount of work to make cd rival even a half-decent TT.
Cheers, Lee.
Hi Brent
Can you be more specific about the AC motor psu ?
What type of AC motor ? is it a 24pole (premotec) ?
Now back to the opamps...., My initial idea (following some very experienced suggestions by contributers to this thread) was to build a buffer to replace my 101pre.
I believe this would work wonders with the CDP or the tuner, but my Riaa needs some gain, so I postponed this experiment.
After your comments on the Burson, I am wondering if it is viable to build a pre based on the discrete opamp and if it should produce similar results as a no gain jfet no feedback buffer.
PS: I agree that we need an enourmous amount of work to make a CDP sound as good as medium TT, but I also agree that vinyl is not practical, needs much care and attention to detail and only 10% of the black discs sound better than CD. But when that happens, it is Nirvana.
Ricardo
Note: Please excuse my insistent off topic but this thread magically produces briliant ideas.
Can you be more specific about the AC motor psu ?
What type of AC motor ? is it a 24pole (premotec) ?
Now back to the opamps...., My initial idea (following some very experienced suggestions by contributers to this thread) was to build a buffer to replace my 101pre.
I believe this would work wonders with the CDP or the tuner, but my Riaa needs some gain, so I postponed this experiment.
After your comments on the Burson, I am wondering if it is viable to build a pre based on the discrete opamp and if it should produce similar results as a no gain jfet no feedback buffer.
PS: I agree that we need an enourmous amount of work to make a CDP sound as good as medium TT, but I also agree that vinyl is not practical, needs much care and attention to detail and only 10% of the black discs sound better than CD. But when that happens, it is Nirvana.
Ricardo
Note: Please excuse my insistent off topic but this thread magically produces briliant ideas.
The motor is a AC synchronous motor as used in decks such as the Linn Sondek ((apparently) - my TT knowledge is limited and I am just learning whats what with all the different decks).
There will more than likely be a dc motor version later and/or dc motor upgrade path.
The new V2 Bursons have a zero dc offset btw so no cap required.
Brent
There will more than likely be a dc motor version later and/or dc motor upgrade path.
The new V2 Bursons have a zero dc offset btw so no cap required.
Brent
recently i Change opamp to discrete opamp , upgrade the clock , RCA Jack upgrade to Switchcraft than wire with 6N Silver Wire
and the section i upgrade below
PSU Regualtor - Black Gate STD
OPAMP - Black Gate N
HDAM - Panasonic FM
Analog Output - Black Gate STD
DAC - Sanyo OS-CON
all the things above i mod the price is more than the player alone
and the section i upgrade below
PSU Regualtor - Black Gate STD
OPAMP - Black Gate N
HDAM - Panasonic FM
Analog Output - Black Gate STD
DAC - Sanyo OS-CON
all the things above i mod the price is more than the player alone
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
L700 said:recently i Change opamp to discrete opamp , upgrade the clock , RCA Jack upgrade to Switchcraft than wire with 6N Silver Wire
and the section i upgrade below
PSU Regualtor - Black Gate STD
OPAMP - Black Gate N
HDAM - Panasonic FM
Analog Output - Black Gate STD
DAC - Sanyo OS-CON
all the things above i mod the price is more than the player alone
QUOTE]
Cool. Try bypassing the HDAM and tell us what you think
Brent
poynton said:
Hi Andy
No I have not reverse engineered it, it's a pretty sorted cct tbh.
HERE is a pic I took of the V2 opamp. The Fets are 2sk170. Its much more compact than the V1.
P.S I'm not allowed to show the V2 images on the web site until 1st March when this one is officially released lol so
Brent
I may look at the cct more closely in the future but what I pay for these is approx the same as what my dos cost to get made and there is alot more components on these (and can be used in almost all cdps etc). Makes me wonder how they make them for what they do. Well it's obvious really they have shed loads made.
Brent
Brent