Return-to-zero shift register FIRDAC

[nautibuoy]

I think way more for full equiped board?

JP

Possibly, but I don't think there are pick and place files in the Gerber set.

 

[JPS64]

Possibly, but I don't think there are pick and place files in the Gerber set.

You could ask Marcel?

JP

 

[MichRT]

Looking forward to a possible Group Buy for RTZ DAC boards, it will be useful to get an idea of the level of interest from fellow audio DIY'ers so, if that's you, maybe you could add your name to the list below;

nautibuoy - 3 sets

1 set please!

I’ve been meaning to catch up on this project, still very interested. Very awesome to see the progress, thanks for putting this together y'all

 

[SonnyMarrow]

nautibuoy - 3 sets
pgour - 1 set
Raj1 1 set
rfbrw 1 set
wealas 1 set
barryblue - 1 set
randytsuch - 1 set
Mich - 1 set
Sonnymarrow - 2 sets

 

[Twinkletoes]

nautibuoy - 3 sets
pgour - 1 set
Raj1 1 set
rfbrw 1 set
wealas 1 set
barryblue - 1 set
randytsuch - 1 set
Mich - 1 set
Sonnymarrow - 2 sets
Twinkletoes - 1 set

 

[porcupinetrain]

porcupinetrain - 1 set

Glad to see this project making very positive progress.

 

[nautibuoy]

You could ask Marcel?

JP

Yep, but he's already contributed so much to these projects...

 

[nautibuoy]

nautibuoy - 3 sets
pgour - 1 set
Raj1 1 set
rfbrw 1 set
wealas 1 set
barryblue - 1 set
randytsuch - 1 set
Mich - 1 set
Sonnymarrow - 2 sets
Twinkletoes - 1 set
porcupinetrain - 1 set

 

[JPS64]

What is used insted of not available OPA2210?

JP

 

[MarcelvdG]

Good question. When I built the prototype, OPA2210s were still available.

 

[MarcelvdG]

The OPA1602 and OPA1662 look interesting as possible alternatives, I'll have to have a better look at their datasheets.

At Mouser, the OPA2210ID should be back in stock again on 13 February 2023.

 

[Mark Johnson]

Very happy with (currently sold out) OPA209. Excellent noise, excellent bandwidth, and the cute-as-can-be SOT23-5 package, same size as a split pea.

 

[MarcelvdG]

Interesting, the OPA2209 datasheet is almost the same as the OPA2210 datasheet, although the offset, bias current, 1/f noise and noise current are somewhat worse. Pity it's also sold out.

 

[MarcelvdG]

The OPA2209 would be a good and cheaper alternative for the OPA2210, but they are out of stock until late July, at least at Mouser (at least the variants in an SO-8 package).

The OPA1602 should also be a good alternative, Mouser has 1566 + 503 of those in stock.

The OPA210 is also out of stock, the OPA209 is a good and cheaper alternative. There are three OPA209AID in stock at Mouser, but they expect to get more of them and new OPA210 already in December this year.

 

[JPS64]

And for the OPA1678?

JP

 

[nautibuoy]

I tested a HV regulated power supply today - its a Statistical Regulator kit based on Morgan Jones's ideas - and it's now ready to use with the valve output stage for the RTZ Dac.

 

[MarcelvdG]

Reply to post 195: NE5532. In fact the prototype also has NE5532's because the OPA1678's have been out of stock for quite a while.

 

[NickKUK]

Do we know the rough PCB cost? I’m interested in a set 🙂

 

[nautibuoy]

Do we know the rough PCB cost? I’m interested in a set 🙂

Add your name to the list and I'll advise of the cost after I get some quotes when Marcel finalises the PCBs.

 

[nautibuoy]

At Mouser, the OPA2210ID should be back in stock again on 13 February 2023.

I had to place an order with Mouser so I now have a pair of OPA2210Ds on backorder - I figure it'll be the New Year before this project gets anywhere near assembly...