I expected something more complicated 🙂, but im really interested how the circuit looks. I would build one for comparation.
Hi Goran
The circuit is nice and easy - I just never heard it yet - I have 2 finished
7805's ready to go in - one for 7310 and the other for Ram.
They'll both have their own transformer, rectifier and caps.
I was waiting till your board arrived so I could take it all to pieces at the same time and fit them all at once.
I took some chances on my Oscon's and bought them off E Bay from a good seller called Vintage Audio Lab - where I got the clock.
So far everything I receive from this company has been excellent and genuine. ( I think
) !!
Andrew
The circuit is nice and easy - I just never heard it yet - I have 2 finished
7805's ready to go in - one for 7310 and the other for Ram.
They'll both have their own transformer, rectifier and caps.
I was waiting till your board arrived so I could take it all to pieces at the same time and fit them all at once.
I took some chances on my Oscon's and bought them off E Bay from a good seller called Vintage Audio Lab - where I got the clock.
So far everything I receive from this company has been excellent and genuine. ( I think
) !!Andrew
I see, but i think it will be better to not do all mods at once, for me is better to go step by step to see which mod will bring the best improvement.
The 7805 can handle the current of 200 mA easily if its mounted on a heatsink. But i suggest the discrete PSU for all chips.
Try those teddy's and tell us if they are worth to use. Im really interested if they will improve something..
Thanks for the information abt Vintage Audio Lab.
Acctually, i think the biggest improvements can be achieved with separated trafos, no matter if you use discrete or some 78xx or LMxx. (Of course the advantages of an discrete PSU are obvious).
Goran
The 7805 can handle the current of 200 mA easily if its mounted on a heatsink. But i suggest the discrete PSU for all chips.
Try those teddy's and tell us if they are worth to use. Im really interested if they will improve something..
Thanks for the information abt Vintage Audio Lab.
Acctually, i think the biggest improvements can be achieved with separated trafos, no matter if you use discrete or some 78xx or LMxx. (Of course the advantages of an discrete PSU are obvious).
Goran
Agree - have already 7805 on the 7220 and it works well with a heatsink.
The teddy reg can not handle the 200 ma of the 7220 because of the BC 547 limits but is ideal for Ram and 7310.
I'll try the regs in the player this weekend and let you know how they work - they are VERY good apparently.
Maybe I'll put them in crap system first to make sure
Andrew
The teddy reg can not handle the 200 ma of the 7220 because of the BC 547 limits but is ideal for Ram and 7310.
I'll try the regs in the player this weekend and let you know how they work - they are VERY good apparently.
Maybe I'll put them in crap system first to make sure
Andrew
Thatway i wanted to take a look at a circuit. I wondered why the BC547 is there. Now its much more clear.
What's your reference system? My "reference system" ((Amp and preamp), speakers i have are commercial product) is still waiting for modded CD40, I wonder how it will sound.
What's your reference system? My "reference system" ((Amp and preamp), speakers i have are commercial product) is still waiting for modded CD40, I wonder how it will sound.
It'll probably sound fantastic Goran - then the clock and even more improvements to come.
Whole reference system is DIY :
4 way loudspeakers ( solid slate - LUPEK ? - and 25mm beech wood ) drive units all vintage 1960's ovals with alnico magnets ( 13 x 9 inches Bass units - 9 x 6 inches Lower midrange units - 6 x 4 inches upper midrange units ) and inverted 60's microphone elements for tweeters.
Pre Amp is a lightspeed attenuator, 4 x LM 3886 mono blocs for lower mid, upper mid and tweeter, large dual mono stereo power amp for bass drive units.
2 x 6N6P buffer nearly finished for the main system - passed the test on the crap system - just have to make it look nice 🙂 ( I have a wife to please )
This made a big positive change to the sound - the midrange is astonishing tbh and I may eventually take the signal straight off the dac to this in the future - once I know more about what I'm doing - passive i/v etc. ( more reading )
Lots more still to do 😀
Andrew
Whole reference system is DIY :
4 way loudspeakers ( solid slate - LUPEK ? - and 25mm beech wood ) drive units all vintage 1960's ovals with alnico magnets ( 13 x 9 inches Bass units - 9 x 6 inches Lower midrange units - 6 x 4 inches upper midrange units ) and inverted 60's microphone elements for tweeters.
Pre Amp is a lightspeed attenuator, 4 x LM 3886 mono blocs for lower mid, upper mid and tweeter, large dual mono stereo power amp for bass drive units.
2 x 6N6P buffer nearly finished for the main system - passed the test on the crap system - just have to make it look nice 🙂 ( I have a wife to please )
This made a big positive change to the sound - the midrange is astonishing tbh and I may eventually take the signal straight off the dac to this in the future - once I know more about what I'm doing - passive i/v etc. ( more reading )
Lots more still to do 😀
Andrew
Well, well... 🙂 nice setup!! IM jealous 🙂 esspecialy on the speaker units. How do you separated the signal for all those amps? Active crossover?
Also, how that LM3886 sound?
I have completely different aproach, just single ended tube preamp and SE follower in A class. The best sound for me is when im connecting the CD source directly to the SE follower without any volume control, in this case the sound level is enough for the listening in a small-middle room . About my speakers.... have no comment ... Wharfedale diamond 10.4 🙁
Now im stacked with my marantz pm-44SE because of the phono section, i have to build some phono stage for the tube preamp in a future. Mostly im listening the LP's.
BTW what i noticed, after I add the PSU for SAA7310 the upper middles and highs sounds very close to the midds and highs of an LP.
Really ?
I wasn't sure what would happen - I thought the main gain was with 7220.
Since I fixed a transformer, bridge and cap arrangement for the regulator to the 7220 I have similar gains in all areas.
So there is still a lot more to come then ?......Good.
I've just asked the guy where my inspiration came from about using super regulators on the dac board ( -5 / + 5 / - 15 rails )
He's done it already but I'm hoping he says ' BIG ' gains from doing this.
Sometimes it is hard to imagine how it can get better !!
Andrew
I wasn't sure what would happen - I thought the main gain was with 7220.
Since I fixed a transformer, bridge and cap arrangement for the regulator to the 7220 I have similar gains in all areas.
So there is still a lot more to come then ?......Good.
I've just asked the guy where my inspiration came from about using super regulators on the dac board ( -5 / + 5 / - 15 rails )
He's done it already but I'm hoping he says ' BIG ' gains from doing this.
Sometimes it is hard to imagine how it can get better !!
Andrew
Hi Andrew,
I went trough the same think. I can tell you the discrete psu is totally different then others. Just read this:
http://www.diyaudio.com/forums/digi...ding-ultimate-nos-dac-using-tda1541a-368.html
Danico Hi
Just to let you know the package I sent was returned to me empty today😕
They can not explain why this has happened ?
I have now posted another one.
The new pack contains the 470 uf Nichicons you need, the BC 550 CG and Arcotronics 1 uf film cap.
I have lots of these three items and thought it may help a little.
Post Office said 4 Days this time
Look out for it
Andrew
Just to let you know the package I sent was returned to me empty today😕
They can not explain why this has happened ?
I have now posted another one.
The new pack contains the 470 uf Nichicons you need, the BC 550 CG and Arcotronics 1 uf film cap.
I have lots of these three items and thought it may help a little.
Post Office said 4 Days this time
Look out for it
Andrew
What ?
All of it ? 😱
OK, I read the important part !!
25 boards please............hahahah
Andrew
All of it ? 😱
OK, I read the important part !!
25 boards please............hahahah
Andrew
Hi Andrew,
Very sorry for your (our) lost.
Yes I did read the treat over from the beginning . Actually 2 times cause I deleted all the info I have saved.
For you the last 2-3 pages answer your psu question.
If you need I can send you all the info I saved.
But I use linux and the text file saved together with the corresponding picture that windows cannot see ;-((
And the text file (txt) is readable with wordpad.
the schematics in jpg from that you can get some idea.
I try to separate the text from the picture right now.
Very sorry for your (our) lost.
Yes I did read the treat over from the beginning . Actually 2 times cause I deleted all the info I have saved.
For you the last 2-3 pages answer your psu question.
If you need I can send you all the info I saved.
But I use linux and the text file saved together with the corresponding picture that windows cannot see ;-((
And the text file (txt) is readable with wordpad.
the schematics in jpg from that you can get some idea.
I try to separate the text from the picture right now.
Last edited:
Goran Hi
The Teddy regs work very well around the 7310 and ram chips..
A bit more of everything but mostly in midrange - which I like.
More noise has gone I guess and drums have gained hardness, speed and slam.
So, once your boards are installed I will build more Teddy's and use around the dac on the -5 / +5 and 15 volt rails.
It'll be so simple to take out the standard 317 / 337's and just drop in these replacements.
Your boards will take me to a new level of sq and once I get my valve output stage installed and working I could have something very nice indeed.
I am looking forward to finally putting the lid on and leaving it alone !
How is your machine now it is burning in ?
It must be pretty nice already.
Najlepsze życzenia
Andrew
The Teddy regs work very well around the 7310 and ram chips..
A bit more of everything but mostly in midrange - which I like.
More noise has gone I guess and drums have gained hardness, speed and slam.
So, once your boards are installed I will build more Teddy's and use around the dac on the -5 / +5 and 15 volt rails.
It'll be so simple to take out the standard 317 / 337's and just drop in these replacements.
Your boards will take me to a new level of sq and once I get my valve output stage installed and working I could have something very nice indeed.
I am looking forward to finally putting the lid on and leaving it alone !
How is your machine now it is burning in ?
It must be pretty nice already.
Najlepsze życzenia
Andrew
Witam Andrew 🙂
🙂 You learned some polish, very nice 🙂
Im 2 years here and im learning it still 😉 extremly hard language but sounds awesome 🙂
Abt project, I would suggest You to use the discrete PSU for TDA1541 also. I have never tried teddy regs, maybe you can send me a circuit? So I can make a comparation.
My player sounds very nice and im not turning it off at all for a week. Today im finishing the PCB(tda1541) for Danico and I have also 2 more boards for him, for saa7310 and for saa7220 already finished. I hope ill send them all tomorrow.
Then I can go on with my project, first i would try the discrete PSU for the audio stage. I still have LM388. Maybe the tube output can be a good solution..will see.
Also i have to build the phono stage and finally put in my "reference setup.
Regards
Goran
Wow - serious stuff !!
Does it make a big improvement ?
I'd be interested in one of those in the future when you have time.
Andrew.
Does it make a big improvement ?
I'd be interested in one of those in the future when you have time.
Andrew.
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