Mini-Me phono preamp

[flancfuster]

Fine by me, go ahead and share the gerber files.

 

[Boydk]

Allright then 🙂
Here they are.

 

[krca45]

Coupling caps are Wima mkp10, 0,1 on them in small lettering , 400V, 10 big code number.

Will check R2, R9 & R19.

Impedance of the next stage should be 50K, tube amp with selector & vol ctrl.

Thank You very much

 

[pamook]

🙂 Thank you for reposting the files

 

[Boydk]

You´re welcome.
It´s not a repost, since these were never posted before. Just the GB that ended some time ago 🙂
Just needed Koifarm´s & Flancfuster´s permission before posting them, so the thanks goes to the two contributers 🙂

 

[Koifarm]

I have made a new Mini-me PCB.
Just ordered 10 pieces.

This PCB you can(not needed) mount tubes and dip switch on solder side.
Then dip switch can changed at upper side of casing and the tubes stick out of the casing.

PCB has all the parts for a MM Mini-me except the transformer.

After PCB is tested, rest is available.

 

[Boydk]

Looks great 🙂

 

[sebuschi]

Mini-me PCB

Hi Ronny,
if the test is successful I would like to buy one or two of the PCBs.
BTW: Do you also have a PCB for the PSU?


Best regards
Achim

 

[Koifarm]

The PSU is already on the PCB, only the transformer is not on the PCB. You can separate the PSU part from the PCB.
But this is not required.

 

[gapmedia]

I would be interested in a board also.

 

[arg_]

and one for me please, if available

 

[Koifarm]

Today i received the pcb's. I shall test one first next week.
And will show the result.

 

[Koifarm]

Did some soldering today. Test it tomorrow.
Had to drill 2mm holes for 3 biggest capacitors.

Further simple build.

 

[Boydk]

Looks amazingly good 🙂

 

[Koifarm]

This afternoon i have tested the PCB. There was one short between ground top copper and + C10a. I could disconnect this joint from the top copper with a 8mm drill.

And now the mini-me plays like it should. I fit this PCB in a 110 x 160mm eurocard housing with the transformer mounted at the outside.

Here you can apply for a PCB, just 9 to share.
https://www.diyaudio.com/forums/group-buys/362704-mini-tube-phono-preamp-pcb.html#post6403338

 

[Koifarm]

Members l'flu, sebuschi, gapmedia,arg_ you have all a PM from me.

Ronny

 

[Koifarm]

All pcb's are sold.

 

[sebuschi]

Hi Ronny, what are the specifications for the Zener or maybe a product number in one of the bigger distributors' catalogue?
Many thanks Achim

 

[Koifarm]

Z1 is not a zener but a fuse in the AC powersupply, it is not on the PCB.

 

[Boydk]

Maybe you should have named it F1 instead?? 🙂