TDA1541A Diy Pcb - "Distinction-1541 v2"

[ryanj]

If you make a CEN PB, I would be interested in one! A friend has a Lampizator, and I get its appeal, but I'm not sure its me. Very lush and colored, but nice. There is a thread on DIYA where someoen has refined a CCDA tube stage and I find this appealing. Although Thorsten first went with an SRPP stage, it seems the consensus from what I have seen is that it's probably not the best topology for i/v use. I think his last published i/v was a single 6922.

Hi Luke,

If I end up making a new CEN pcb, i'll definitely share what I have. Still much work to be done. It may be a better option to make a SEN instead, since it uses only N channel devices and not matched P to N channel. BF862s may be worth looking into to use in the SEN instead of k170s, although BF862 are in a SOT-23, so may be fun to match...

Cheers.

 

[Luke]

Thanks Ryan. I have a few k170 so will use these probably. If you do the bf862 thing i may be tempted or else drill holes in those lovely smt pads🙂

 

[ryanj]

Quick sim

Hi guys,

Just thought I'd share this simulation to compare the two circuit scenarios of -5V and -6 within the zener string stacked supply.

I mentioned this a few pages back but now i've upped the current to match the heat dissipation off the pass PNP for -15V (main circuit restriction) when operating with -5V to demonstrate there really is no downside to this -6V config, although input voltage to the supply should be no less than 26.5V instead of 26V.

cheers

 

[Greg Stewart]

Ryan,

I keep poking my head in here to see how the project's going, looks like I can get boards soon!

I also want to say MANY THANKS for trying out the Rubycon PML caps, I have some 10uf and 22uf here for some other projects, was very curious how they'd work. Sounds like you like them!

Looking forward to this coming together!

Greg in Mississippi (#1 on the GB list!!!)

 

[ryanj]

PCBs ordered.

Ryan,

I keep poking my head in here to see how the project's going, looks like I can get boards soon!

I also want to say MANY THANKS for trying out the Rubycon PML caps, I have some 10uf and 22uf here for some other projects, was very curious how they'd work. Sounds like you like them!

Looking forward to this coming together!

Greg in Mississippi (#1 on the GB list!!!)

Hi Greg,

I see you put your name on the list December 2014! Thanks for being patient, and remaining interested in this project. PCBs have finally been ordered so the wait is coming to an end. The PML caps from Rubycon were recommended to me by someone very helpful on this forum. I haven't had a huge amount of experience with them but they certainly fit my design criteria.

Cheers.

🙂

 

[Extreme_Boky]

PML caps:
Product Information: Features and applications of polymer thin film multi-layer capacitor "PMLCAP"/Capacitor, Power Supply Units RUBYCON CORPORATION

Seems like Rubycon managed to cram huge capacitance into a very small package. As the result, according to their product info, series inductance and resistance are very small - negligible.

 

[ryanj]

BOM

Hi Guys,

Here is the link to the Distinction-1541 v2 BOM.

D2 BOM

Cheers.

 

[ryanj]

Pricing information and order form.

Hi All,

PCBs have arrived!

Please find below a link to fill out an order form.

Order form and Pricing information

Thanks to all that have followed along with this project, its been a great experience!

Cheers.

Ryan

 

[Ludwig Haus]

Hi Ludwig Haus,

So you want to compare my schematics with somebody else's? That's fine but as I said - I have to finish the final design first.

Ryan

Dear Bryan,

Are you ok to post the schematic now that the design is finished?.

LH/S

 

[Luke]

Hi Ryan, thanks for the update. This is obviously a bit more complex than Vs1. Will there be an overlay silkscreen showing where to put the correct part?

 

[ryanj]

Hi Luke, Ludwig

An overlay silkscreen can be organised if that will help, no problem, just give me a few days. I'll also make a more detailed schematic available.

Ryan

 

[ryanj]

Schematics and overlay.

Hi Guys,

Here is the link to the schematics and pcb overlay.

Schematics and overlay

Once file is opened and saved onto your computer, open in a pdf viewer, you will see a bookmark button menu on the left if using Adobe Reader. Every designator is listed, it will zoom into the part on the pcb and schematics for your convenience.

Cheers.

 

[ryanj]

Hi Guys,

First lot of orders will be sent out tomorrow.

Cheers,

Ryan

 

[ryanj]

Updated Silkscreen overlay.

Hi Guys,

Please download the latest Schematics and silkscreen overlay on post #172, as I had to correct a mistake.

Cheers.

 

[ryanj]

Confirmation of paid and posted orders will be sent via the email address's provided in the order form when I get home tonight.

Ryan

 

[Green77]

Hi all.
What are you using for output stage?
I have build a tda1541 before and then used a lampizator 6n2p stage...
Any good easy discrete stage?
Best Regards //Daniel

 

[Luke]

Hi Daniel, I'm considering a vacuum state fvp5a, but i need to work out the gain. I will likely use a low value resistor for iv, maybe 56 ohms. There is a guy on this forum who has done alot of work around iv resistors and tube gain stage, I think he used a ccda and the thread goes by this name. Check it out, it has links to his website. If used anything else it would be jfets i think.

 

[Green77]

Thanks.
Op stage maybe?
BR //Daniel

 

[Luke]

What do you mean by op stage? My comment above was for output stage.

 

[Green77]

Hello.
Yes, sorry, i should made myself clear.
I did understand your post above with a tube stage as output.
My second question, not so easy to understand sorry, is if anyone have a easy and good op output stage?

BR//Daniel