DAC build TDA1541A/SAA7220P/B *will take som time*

Fantastic name isn't it ?
It's perfect for me - like my middle name.

I contacted the other e bay company who had the Vanguards but did not advertise .3ppm 11.289.
A lady replied saying she had the Vanguard .3ppm in 11.289 but wanted to do a private sale via pay pal - it spooked me a bit.
I would not be covered by E Bay if the product was not OK.
Then I worried about fakes...

Where did you find yours ?
 
Fantastic name isn't it ?
It's perfect for me - like my middle name.

I contacted the other e bay company who had the Vanguards but did not advertise .3ppm 11.289.
A lady replied saying she had the Vanguard .3ppm in 11.289 but wanted to do a private sale via pay pal - it spooked me a bit.
I would not be covered by E Bay if the product was not OK.
Then I worried about fakes...

Where did you find yours ?

You've got PM
 
It's not pretty, but the damage to PCB was made by previous owner.

B1_jumpering_3.jpg
 
B1 buffer is awesome.
should be good 🙂

I've been told that the second pair of AD797, the ones B1 would replace, is a 12db/oct filter, and that the B1 isn't suitable. The one who told me this said he'd look into it more tonight.

Originally I planned to connect the B1 back to the DAC PCB (just put a jumper instead of 10uF filmcaps on PCB since B1 already has them), this could cause positive feedback and oscillation according to a member on a Swedish forum.
 
Put in one more order for this month:

2pcs Mundorf Mcap 8,2uF 250V
1pc CS8412-CP
1pc DV709
2pcs NE5534 (will test the DAC with no buffer by making a jumper socket per channel, pin3 to pin6, to plug into sockets for buffer opamps. If succesfull, I'll order 2pcs AD797).
 
Just realized that I'm up to 280USD in all so far 😱

But I DO believe the parts I'm using are far better then the ones supplied w the kit.

There had better be no smoke when I power on this dac 🤐

Still to buy: Transformers and TCXO....and later AD797 and maybe OPA627.

The B1 will become a preamp that I'll sell if it doesn't vastly outperform my arcam.

I found a top to my enclosure, original piece rather cheap.
 
What do you guys clean of flux with?

I tend to use aerosol isopropanol (isopropyl alcohol?) and a toothbrush.

Asking because my better half has been cleaning the apartment and doesn't know where she put my isopropanol...

Got other forms of alcohol, for cleaning wounds, not ethanol.