any recent Mic Parts builds? and what's Dachman?

[Blue Jinn]

I was just reading about capsules and Arienne Audio capsules for the Dachman maybe?...per DIY forums.
Pretty well spoken of per testing etc. seems used in upgrades.

Specs of the builders like to keep it quiet on capsules sometimes and are more open about internal parts Wima and Fets and caps, and transformers etc...
but the capsule mfg are kept in a secret vault at Hogsworths.

add: Seems Dachman buy capsules from 3U too ? I dont know.

been in the capsule rabbit holes lately.

AA Microphones has capsules made in the same factory as Peluso, except all the work is done in China. He also carries transformers. Not sure how tariffs will affect that if you're in the USA. I have a pair of AK47s I'm going to install in a pair of MXL V69s. The ones I got correct some of the flaws in the original design. There's no epoxied daughter board and the tube is oriented so the base is closer to the capsule.

 

[Blue Jinn]

In case anyone is interested: http://www.bluejinn.org/2020/05/6ak5-microphone-build-thread.html

 

[CoolCat]

thats ambitious, nice blogbuild.

K47 to a 6ak5 tube....looks complex to me, but Ive never built a board/ amp.

the voltage seems to be getting up there, a bit more needed than 48 or 60...
I was reading on WA47 capsule its 80v..K47 capsule....and it is very quiet. More sensitivity= higher voltage?

You've got some experience I assume, seems most replace a capacitor or all, but not many doing the whole Tube upgrade, imo.

 

[Blue Jinn]

thats ambitious, nice blogbuild.

K47 to a 6ak5 tube....looks complex to me, but Ive never built a board/ amp.

the voltage seems to be getting up there, a bit more needed than 48 or 60...
I was reading on WA47 capsule its 80v..K47 capsule....and it is very quiet. More sensitivity= higher voltage?

You've got some experience I assume, seems most replace a capacitor or all, but not many doing the whole Tube upgrade, imo.

I used 100v for the tube, as it's pretty similar to the Royer, which is pretty similar to the SELA. If you look at the schematic R2 and R3 is a voltage divider that drops the 100v to 60v

 

[CoolCat]

Where do you get the 100v from? the power supply dropped down from 120vac to 100v dc for the tube?
just curious.

of those parts the resistors and caps....tube....and capsule, how much do you think the discrete components contribute to tone? I wonder.
Seeing this drawing you made, I wonder if you change values in resistors is it a big deal in sound?

If you want me to remove the picture...I can delete it. But its faster to view this way...but your blog is a great read too.

 

[CoolCat]

47 circuit. Similar....

8 qty resistors, 3 qty capacitors.....a Capsule, tube, and transformer. ... seems kind of tempting.

 

[CoolCat]

47 FET schematic almost looks more difficult to build, but there's no power supply needed.

 

[Blue Jinn]

Hi,

Sorry for the late reply! For the PSU for this one, I just got a second hand MXL PSU and swapped out the zener diodes for 50v ones and the heater regulator from a 7909 to a 7906. So I don't mix up cables, I use 5 pin XLRs instead of 7 and it follows the RoyerMod wiring. I got a sweet deal on a bunch of 5 pin male XLRs from eBay, and then a bunch of jacks from Mable Audio in China. I'm not sure how much more they would cost right now with tariffs. Same with the cables. The DMX 5 pin XLR cables work fine and they were really cheap from Thomann in Germany. For the other Royers I just used the PSU board from the BigUgly circuit and transformers I had laying around and stuck them in an old PC PSU box. I've retired those in favor of some more MXL PSUs with different zeners. Sometimes these go cheap on eBay. The circuit is really just the Royer with a similar spec tube that's miniature instead of subminiature, and also has a grid leak resistor which the Royer doesn't have. If you look at the BigUgly (I might have a thread here about that) it's the Royer with the G7 pattern scheme. I have boards for that one.

I have the schematic for the MXL V69 PSUs around here somewhere if you need it.

Where do you get the 100v from? the power supply dropped down from 120vac to 100v dc for the tube?
just curious.

of those parts the resistors and caps....tube....and capsule, how much do you think the discrete components contribute to tone? I wonder.
Seeing this drawing you made, I wonder if you change values in resistors is it a big deal in sound?

If you want me to remove the picture...I can delete it. But its faster to view this way...but your blog is a great read too.View attachment 151217

 

[Blue Jinn]

47 FET schematic almost looks more difficult to build, but there's no power supply needed.

View attachment 151344

I don't know much about the 47 or how much of that is the DC-DC converter. If you haven't already register at GroupDIY.com. There is a wealth of information there, and some really smart people that post. I have a couple of other mod posts here. the BigUgly, the G7 single sided, the "U87 Front End" mod to the MXL 2001, and the "Zapnspark direct connect mod" to the MXL 2006 (and a bunch of other MXLs that use the same circuit.) Swapping out capsules seems to help too, although I've only used cheap knockoffs. I have some decent AAMicrophone capsules that are waiting to go into some MXL V69s.