KM84 DIY Body & PCB kit – CLOSED

Help Support GroupDIY:

Banzai

Well-known member
White Market Member
Joined
Apr 6, 2013
Messages
972
Banzai_KM84.png


DIY KM84 kits - Sold Out

Parts included in kit:

– KM84 DIY PCB designed by Graeme Woller
– Maiku cardioid SDC capsule
– Raw brass body-tube
– Polished and plated capsule head and connector housing
– 2N3819 JFET

Parts needed to complete build:
– Components outlined in Mouser BOM
– BV-107 type transformer (Cinemag CM-5722, AMI T8, or 3U GZT-84)

That's it ;)

------------------------------------------

Pricing incl. all fees and shipping:
EU – 140,00 EUR
Rest of world – 162,00 CHF

If you're in Switzerland, please send PM. Shipping is much cheaper.

If ordering more than one kit:
EU – only add 120 EUR for every extra unit.
ROW – only add 133 CHF for every extra unit

Order example:
EU 2 kits = 140 + 120 = 260 EUR total
ROW 2 kits = 162 + 133 = 295 CHF total

------------------------------------------

3U GZT-84 transformers SOLD OUT
EU – 25 EUR / transformer
ROW – 28 CHF / transformer

Order example:
EU 2 kits + 2 transformers = 140 + 120 + 25 + 25 = 310 EUR total
ROW 2 kits + 2 transformers = 162 + 133 + 28 + 28 = 351 CHF total


------------------------------------------

How to order:
Send your Paypal payment directly to [email protected] with your name, shipping address, and order details. In current state of postal services, best to also include phone number.


------------------------------------------
 
Last edited:

Banzai

Well-known member
White Market Member
Joined
Apr 6, 2013
Messages
972
Graeme's Build Guide:
http://bit.ly/2ML5aOv

PCB Schematic:
https://www.dropbox.com/sh/s2pfjwo7bb3a0zr/AABnKkG5hzBzXf-Ha7VlZ7Kaa?dl=0

Mouser BOM:
https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=f5036488e2

NB: 279-RGP0207CHK1G0 can be replaced with 588-MOX-200001007JE
 

Banzai

Well-known member
White Market Member
Joined
Apr 6, 2013
Messages
972
3U GZT84 wiring:

RED wire -> G
BROWN wire -> R
YELLOW wire -> B
ORANGE wire -> Y

Transformer board pads:

KM84-PCB-Transformer-pads.png



Stock 3U diagram:
s-l500.jpg
 

Ericbazaar

Well-known member
Joined
Mar 21, 2013
Messages
176
Location
Germany
Hello Banzai,

Can you tell me more about the micbody? Internal diameter and length?
More Infos about the capsule would be nice.
Is it possible to fit a submini tube inside?

Best
 

TillM

Well-known member
Joined
May 21, 2016
Messages
603
Location
Berlin - Germany
Ericbazaar said:
Hello Banzai,

Can you tell me more about the micbody? Internal diameter and length?
More Infos about the capsule would be nice.
Is it possible to fit a submini tube inside?

Best
I know Banzai could give you better informations but as far as I know, if they have the same diameter like the beesneez lulu a submini tube should work. Ben use the same body for his tube mic small condenser mics.
 

Banzai

Well-known member
White Market Member
Joined
Apr 6, 2013
Messages
972
Ericbazaar said:
Hello Banzai,

Can you tell me more about the micbody? Internal diameter and length?
More Infos about the capsule would be nice.
Is it possible to fit a submini tube inside?

Best

Original Neumann is 21 x 110mm
This body is 22 x 130mm. It's short and fat, very nice looking mic.

Capsule is based on KK84. Same materials (mylar/gold)

No problem for sub-mini. Plenty of space inside (ø19mm)
 

Banzai

Well-known member
White Market Member
Joined
Apr 6, 2013
Messages
972
Vac11 said:
Is there compatibility between this body and the geniue Neumann KM84 capsule?

The connecting pin is different and the Neumann is slightly smaller in diameter. But unless you have one lying around, it's not really worth it: new KK84's are €535. Might as well buy a complete vintage KM84  ;)
 

midwayfair

Well-known member
Joined
Apr 7, 2015
Messages
526
Location
Baltimore
Aw man, This is a great deal and we really don't have many options for these, and I even have the transformer Ina drawer upstairs, but I don't think I can swing this while in classes.

Is this likely to be a one-time thing, or do you plan on doing runs every once in a while?
 

TillM

Well-known member
Joined
May 21, 2016
Messages
603
Location
Berlin - Germany
PAyment sent for a second one.  ;)
I will try it, really like the sound of the KM84, will see how it sounds compared to each other.
 

Banzai

Well-known member
White Market Member
Joined
Apr 6, 2013
Messages
972
TillM said:
PAyment sent for a second one.  ;)
I will try it, really like the sound of the KM84, will see how it sounds compared to each other.

Thanks x2  :D


midwayfair said:
Aw man, This is a great deal and we really don't have many options for these, and I even have the transformer Ina drawer upstairs, but I don't think I can swing this while in classes.

Is this likely to be a one-time thing, or do you plan on doing runs every once in a while?

For the moment it's just a one time thing. With Graeme we wanted to create a high quality project that's really easy to build and accessible to anyone with a soldering iron. This might be the simplest project on Groupdiy: fill the board, set bias, screw on the capsule and you're done!

The metalwork is also a custom run made for this project, the only off the shelf parts being the springy bit and the connector housing. We left the body tube raw on purpose, so everyone can decide whether they want to leave as is, polish, beadblast, powdercoat, spray paint, or plate. Leaving as is, it should get a nice patina finish after a while (you can accelerate the process by beadblasting).
 

midwayfair

Well-known member
Joined
Apr 7, 2015
Messages
526
Location
Baltimore
Banzai said:
For the moment it's just a one time thing.

Sigh ... time to see if I can move some guitar pedals on Craigslist then before these sell out. Or might just ask the wife for an indulgence :)
 

r2d2

Well-known member
Joined
Jan 16, 2011
Messages
535
Location
A-rea 51
Hi
Any info about capsule and rest of parts cost to complete the mic ?

Any sound sample like acoustic guitar and voice  recorded with a transparent preamp (as well) ?
And better more  some sound comparison with an original unit .

 

TillM

Well-known member
Joined
May 21, 2016
Messages
603
Location
Berlin - Germany
r2d2 said:
Hi
Any info about capsule and rest of parts cost to complete the mic ?

Any sound sample like acoustic guitar and voice  recorded with a transparent preamp (as well) ?
And better more  some sound comparison with an original unit .
this is a first time offer, so there will be no sound comparison at this time.
Anyway, Banzai uploaded a schematic and a BOM.
And as Banzai already said, the capsule is based on the KK84.
 

Banzai

Well-known member
White Market Member
Joined
Apr 6, 2013
Messages
972
Potato Cakes said:
Payment sent for four (4) kits.

Thanks!

Paul
Ericbazaar said:
Money sent for two Kits. Will build nice little Tube Sticks  ::)

Thanks Mike for doing this!

Thanks!  :D

r2d2 said:
Hi
Any info about capsule and rest of parts cost to complete the mic ?

Everything is included except for parts listed in Mouser BOM and transformer
 
Top