[poctop]

Hi All,  Just finished Building this little magic puck,   this is an build example for the M49 in the puck Style,  it is my own flavor of the tlm49 conversion I guess ,
I Might be trying to get a hold of a TLM49 or tlm 149 body to see what happens,
It might need a dedicated mic body but for now the puck is ready for offer,   and yes it rolls..... 

Best ,
Dan, 

D-M49c and D-M49b Build Thread .

All the info Here : http://www.groupdiy.com/index.php?topic=49675.0

M49 mic body Available Here  :
http://groupdiy.com/index.php?topic=60108.msg762707#new
http://www.groupdiy.com/index.php?topic=52563.0
http://www.groupdiy.com/index.php?topic=53018.0

IMPORTANT:
You Should always have the SHLF Jumper in position in the PSU PCB ,  this will ensure that your cable shield is tied at both end of the cable and connect to 0V
you Should Also have the 0V star grounded to your case and then from there to you IEC earth ground ,

For More Information on Grounding
https://www.dropbox.com/s/6y121dasm3iw4ba/Sound_System_Interconnection.pdf?dl=0

Cabling connection From PsU https://io.groupdiy.com/file/gdiy-2017/u/39511/58d1402a053d6.jpg

BOM 
Note: missing from the BOM Styroflex Capacitor   C1  1000pf, C6  560pf  / 630V

PSU 2469 passive
http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=532017ac2f

M49 C or B Mic Parts
http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=f556c18411

For Converting the 5840 Tube to a Triode Tie pin 7-5 Togheter Do not use Pin 4 or Pin 8

5840 Tube Datasheet https://io.groupdiy.com/file/gdiy-2017/u/39511/58d1402a05413.pdf

Schematic:  M49C   https://io.groupdiy.com/file/gdiy-2017/u/39511/58d1402a05435.bmp

Schematic:  M49B   https://io.groupdiy.com/file/gdiy-2017/u/39511/58d1402a05446.pdf

M49 Schematic Poctop PCBS 49b and 49c
https://www.dropbox.com/s/ym5f8tur4y0rgw8/49c-round.jpg?dl=0
https://www.dropbox.com/s/wcym8uf65ov84vi/49b-round.jpg?dl=0
Best,
Dan,

PSU Schematic : https://io.groupdiy.com/file/gdiy-2017/u/39511/58d1402a05456.pdf
Note : the Toroidal tranformer secondary is wired in parrallel to get 120V at the input of the psu

The 20Vac traffo for Europe will not fit as per the current BOM please replace it with this one or an equivalent ,
http://www.mouser.com/ProductDetail/Hammond-Manufacturing/186B20/?qs=sGAEpiMZZMvwUzoUXIIvyQPvPmwnNFGyR%2fQB%252b1BzrOY%3d
also The fuse will be 0.1A instead of 0.2 for America



Capsule Connection both version and Floating Scheme B version


Floating Scheme connection For C version


Cardiod Only Switching Point For Full Operation ( Both B and C version) Those 2 Points needs to be bridged For cardiod Only Mode remove Bridge  ( S2a and S2b)



The Safety Manual and Considerations.https://io.groupdiy.com/file/gdiy-2017/u/39511/58d1402a054af



































































































Note:  To Operate S2 Cardiod only Switch

[poctop]

With the dimension on First Picture is there anyone having a TLM style body and check if it Might fit  or chances to ,

Let me know ,
Best,
Dan,

[tskguy]

Wow that looks very cool!!!  Can't wait to see it in a mic body.

Eric

[poctop]

Wow that looks very cool!!!  Can't wait to see it in a mic body.

Eric

Thanks Eric , I Just realized that i needed to move C5 a bit to better wire the mic ,  i just updated the picture to make sure i dont make the same mistake again, 

Best,
Dan,

[zebra50]

Looks great - I might have a shot.
I have a TLM49 that needs abusing! What do you need to know?

Cheers

[poctop]

Looks great - I might have a shot.
I have a TLM49 that needs abusing! What do you need to know?

Cheers

from the base to the top of capsule mount i have 105mm i wanted to see how the relationship would translate in a this body , if the capsule would sit a the proper level wihout too much shimming , hoping it would be shimming up  ,

Let me know,
Best,
Dan,

[zebra50]

OK - will try to find time tomorrow and measure inside the body. I have quite a lot of work on so might get distracted.

Cheers
Stewart

[dmp]

Diameter is 40mm? Is that what the first pic says? Much smaller than I thought - I recall 60mm?

[poctop]

Diameter is 40mm? Is that what the first pic says? Much smaller than I thought - I recall 60mm?

the puck is 60mm dia and from the pcb base to the top of capsule mount is 105mm
Best,
Let me know,
D

[poctop]

Just had the measurement form Winetree ( Thank, )

approximatively 105mm & 104.7mm , this must be a miracle,

Best,
D

[dmp]

But... a tlm49 is over $1000! To use for a mic build?

[poctop]

But... a tlm49 is over $1000! To use for a mic build?

there is tons of options to explor still. 
 but yet still a tlm49 comes with a body and a neumann K49 or K47 not that bad 


I wander if the cheaper tlm102-103 have the same body Anyone ?>

Best,
DAn,

[HellfireStudios]

But... a tlm49 is over $1000! To use for a mic build?

Neumann M49 is around ten thousand dollars these days. A TLM49 conversion at a fraction of the price sounds like a great deal for essentially the same mic.

Does anyone know of any similarly sized/shaped donor bodies for the D-M49 (hopefully cheaper than a Neumann)?

-James-

[poctop]

is the K49 and K47 the same thing  ?
D

[poctop]

got it ,  from Mr, Neumann.

there is no problem at all. The official name now is "K47/49", part no.
53291.

In earlier days we made a distinction, K49 was the best possibly matched
capsules front/rear; K47 was the second best classification; and for the
U47fet we needed only one side to be perfect, so that capsule was called
K47fet.

Now, our tolerances in the production of this capsule are so small that we
do not make this distinction anymore, and both K47 and K49 are now called
K47/49, and are used for all U47, U48, M49, M249, M149Tube.

[micaddict]

I wander if the cheaper tlm102-103 have the same body Anyone ?>

TLM 103 is smaller, with the headbasket of the U67/87.
TLM 102 is smaller still.
And neither has a K47.

[poctop]

I wander if the cheaper tlm102-103 have the same body Anyone ?>

TLM 103 is smaller, with the headbasket of the U67/87.
TLM 102 is smaller still.
And neither has a K47.

Thanks Henk,
Best,
Dan

[gary o]

Hi I been watching these build threads trying to learn about great mic circuits as experiments I have knocked up some M49ish circuits using 5940 tubes & Olivers TLM149 conversion schematic... was also thinking buying a TLM149 for body & real capsule

Poctop you say this is your flavour of this mic so are you using the schematic posted at beginning I have only just noticed the neuman schemtic seems to have some sort of feedback built in, I havent made that part of the circuit for my experiments  YET

https://www.google.co.uk/search?q=samson+usb+mic&hl=en&source=lnms&tbm=isch&sa=X&ei=MC9UUa-dAoHU0QXSpYHICw&sqi=2&ved=0CAcQ_AUoAQ&biw=1920&bih=955#hl=en&tbm=isch&sa=1&q=samson+g+track+mic&oq=samson+g+track+mic&gs_l=img.12..0j0i24l4.5634.9968.0.12686.12.12.0.0.0.0.103.973.11j1.12.0...0.0...1c.1.7.img.wSqdXi6Bu8c&bav=on.2,or.r_cp.r_qf.&bvm=bv.44442042,d.d2k&fp=43934509a21db43&biw=1920&bih=955&imgrc=b2TUAxZ6ucIV3M%3A%3BybJju97crrLbZM%3Bhttp%253A%252F%252Fwww.maclife.com%252Ffiles%252Fu36%252F0911_samson_gtrack_380_2.jpg%3Bhttp%253A%252F%252Fwww.maclife.com%252Farticle%252Freviews%252Fsamson_gtrack%3B380%3B585

Anygood for a cheap body

[micaddict]

I'll let Dany chime in about the schematic, but regarding the Samson body, that one only has a 54.2 mm diameter. On the outside that is. The round D-49 PCB is 60 mm.

The good news is that the D-49 also comes in a square version. This will fit nicely in the Alctron GT-2B body or Thomann's SCT-700.

http://www.vintagemicrophonepcbkit.com/DM49.html

The guy thought of everything.

[gary o]

Thanks micadict thats a shame Samson a little too small thought would look nice ..... I could prob squeeze my point to point version in that body tho so might grab one they cheap enough

Thanks

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