D-EF47 Tribute To Oliver Archut U47 Build Thread.

Help Support GroupDIY:

poctop

Well-known member
White Market Member
Joined
Jul 15, 2009
Messages
2,263
Hi GroupdiY,

Lately i was working with Oliver with his consent To make a little PCB kit to Build his version of the U47 with EF800 tube.
As you may already know Oliver passed away but I decided to go ahead and finish it in his memory.
This mic once finished will be called the OA tribute U47.

here some partial insight on the construction , the mic will be using Oliver Clasic BV08 series Transformer and Ef800 tube that he personnaly sent to me , I am honnored, I could never thank Oliver enough.


PSU

58d1402a0708b.jpeg


58d028199431a.jpg


PCBS
58d1402a070c5.jpg


Mic
58d1402a070dc.jpg


To be continued.............
Best,
Dan,

Hi All, Just finished Final Testing this microphone,  Everything Works as expected and I am incredibly happy with the sounds of this microphone  :) :) :) :) ,  Many thanks To Oliver for this Awesome Creation.
and one of the most impressive thing not to say the least  this microphone is Incredibly QUIET with this Ef800 Telefunken tube in it ,
This kit will b able to Drive Ef800 , eF802 and Ef80 Telefunken tubes  ;)
Absolutely Love it.

I am opening the Kit to the DIY community as we speak,  there is some minor Adjustemet I had to do with the PSU resistance Value
there is notes on the Shared mouser BOM about Those changes.



PSU PCB SilK Errata


Needs to be

H+
R2 = 6.8ohm 3W
R6  = 4.7 ohm 3W
R11 = 4.7 ohm 3W


B+
R1 = 20K 2W
R3  = 20K 2W
R8 = 25K pot.


This Project need to be adjusted to B+ 105V and H+ to 5.05V as Per Oliver Schematic
Make sure you Follow the component number on the schematic that is posted here , they are not the same as Oliver schematic

The BOM do not contains the Reed Switch but are available at those location ,

the PCB is designed to support these 2 Reed Relay 24V and 48V, Only one resistor is specifically used on the psu for 24V or 48V relay. Notes are in the BOM as well,  Rcoil Relay on the Psu denotes the resistance for either 24V operation or 48V operation.

58d1402a070e8.jpg



48V Shielded Reed Relay Available in the Order Page within the D-47 or D-EF47 order Selection box
http://www.vintagemicrophonepcbkit.com/orders.html

Link to alternative 24V Relay
http://www.digikey.ca/product-search/en?vendor=0keywords=7101-24-1010 Relay Coto PN 7101-24-1010


Here is the tubes datasheet for this project,

https://cdn.groupbuilder.com/groupdiy/u/39511/58d1402a070fa.pdf
https://cdn.groupbuilder.com/groupdiy/u/39511/58d1402a0710a.pdf
https://cdn.groupbuilder.com/groupdiy/u/39511/58d1402a0711b.pdf


The Silk Screen will be corrected on the next Batch if Any,

The PCB was specifically design to have package for AMI BV08 Classic Series and AMI T47 Transformer ,
Other transformer can be fitted as well.  Here is the 2 Mounting Strategies that will permit the Use of about any transformer.

https://cdn.groupbuilder.com/groupdiy/u/39511/58d1402a0712b.zip


could not be happier with this Toy,
Thanks Oliver.

Hope you will enjoy,
Best,
Dan,

Schemo Mic
https://cdn.groupbuilder.com/groupdiy/u/39511/58d1402a0713c.pdf


Schemo PSU

https://cdn.groupbuilder.com/groupdiy/u/39511/58d1402a0714e.pdf

BOM Psu
https://ca.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=acb9dba578

BOM Mic

https://ca.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=f104b8493a

D-EF47 Schematic Thanks toTrans4Funk1
https://cdn.groupbuilder.com/groupdiy/u/39511/58d1402a0715f.pdf



This is Hoe it happened, :)
Best,
DAn,

Pictorial. :)

58d1402a07171.jpg


58d1402a07183.jpg


58d1402a07195.jpg


58d1402a071a7.jpg


58d1402a071b9.jpg


58d1402a071cb.jpg


58d1402a071dc.jpg


58d1402a071ef.jpg


58d1402a07203.jpg


58d1402a07215.jpg


58d1402a07223.jpg


58d1402a07235.jpg


58d1402a07247.jpg


58d1402a0725a.jpg


58d1402a0726d.jpg


58d1402a0727f.jpg


58d1402a072ab.jpg


58d1402a072bf.jpg


58d1402a072d2.jpg


58d1402a072e0.jpg


58d1402a072f2.jpg


58d1402a07304.jpg


58d1402a07317.jpg


58d1402a07329.jpg


58d1402a07337.jpg


58d1402a07349.jpg


58d1402a0735a.jpg


58d1402a0736e.jpg


58d1402a07380.jpg


58d1402a0738f.jpg


58d1402a0739d.jpg


58d1402a073b0.jpg


58d1402a073c2.jpg


58d1402a073d4.jpg


58d1402a073e6.jpg


58d1402a073f8.jpg


58d1402a0740c.jpg


58d1402a07419.jpg


58d1402a0742c.jpg


58d1402a0743e.jpg


58d1402a07450.jpg


58d1402a0745f.jpg


58d1402a07471.jpg


58d1402a07484.jpg


58d1402a074af.jpg


58d1402a074c3.jpg



Shown is the D47 dual tube  but the principle and connection are the same just forget about the other tube
58d1402a074d5.jpg


58d1402a074e6.jpg


58d1402a074f7.jpg


58d1402a07508.jpg


58d028199431a.jpg


Best,
DAn,

 

kidvybes

Well-known member
Joined
Dec 6, 2011
Messages
280
...Good Luck with this Dany!...I know Oliver was a strong believer in implementing the Tele EF800 in a 47-style circuit...I'm looking forward to see this build proceed...I'm confident Oliver would have been pleased...

;)
 

Spencerleehorton

Well-known member
Joined
May 12, 2012
Messages
3,276
Location
Felixstowe, Suffolk, UK
Hi all,

I have been in trusted with also building this tribute mic, never had the pleasure of meeting or talking to Oliver but as a pupil of music and electronics, i think it's safe to say his influence is felt everywhere.
I am very honoured to have Dany trust me with this and as my mentor I can't thank Dany enough.

Some pictures of the start of my build.

Regards

Spence.
 

Attachments

  • image.jpg
    image.jpg
    914.3 KB · Views: 517

Spencerleehorton

Well-known member
Joined
May 12, 2012
Messages
3,276
Location
Felixstowe, Suffolk, UK
The inerts! Plenty of room to have enough to power 2 mics in here!!

Just waiting for a 2 x 115v to 230v transformer to turn up then I can test.

I will be making my own body for this build in true DIY style.
 

Attachments

  • image.jpg
    image.jpg
    732.7 KB · Views: 383

maq3396

Well-known member
Joined
Mar 20, 2013
Messages
158
I am sure that Oliver would feel honored by your efforts.
Thank you for carrying on this work.
Do you plan to make this microphone a single production for Oliver or perhaps release it to the community?

Thanks
Mac
 

poctop

Well-known member
White Market Member
Joined
Jul 15, 2009
Messages
2,263
maq3396 said:
I am sure that Oliver would feel honored by your efforts.
Thank you for carrying on this work.
Do you plan to make this microphone a single production for Oliver or perhaps release it to the community?

Thanks
Mac

Thanks Mac, Yes I will pass it on once it pass all the testing.
Best,
Dan,

 

poctop

Well-known member
White Market Member
Joined
Jul 15, 2009
Messages
2,263
Spencerleehorton said:
Few more tweaks later.

Regards

Hey Spence , The Logo is incredible , you nailed it awesomely, this is so cool.
how awesome would it be if we could have a supply chain of those alctron U47 style body I really like them and obviously a perfect fit for this project.
I am really curious what a feeler thread on this would reveal.
Best,
Dan,

 
Top