kooma

Royer tube mic
« on: January 15, 2018, 05:33:35 AM »
This is work in progress, but I thought I share it;
I made body for Blue Jinn's exellent royer pcb some time ago,
Aluminium tube , mesh was glued with epoxy and long pcb stands connecting top and bottom plates.
Röde capsule&holder.


kooma

Re: Royer tube mic
« Reply #1 on: January 15, 2018, 05:37:40 AM »
This was the first version of PSU.
I went totally crazy with filtering caps ;D

kooma

Re: Royer tube mic
« Reply #2 on: January 15, 2018, 05:52:24 AM »
I didnt like the thin aluminium and since I happend to have some REALLY sturdy 5mm thick steel tube,
I thought I'd try how it would dampen the body..and it did.

original body was painted and this tube was glued (with eleastic)glue on top of that.

MagnetoSound

Re: Royer tube mic
« Reply #3 on: January 15, 2018, 06:04:21 AM »
These days we don't see DIY like this any more. Cool.

Dan

I don't think people realize what an embarrassment of riches this place is   -  Paul Gold

kooma

Re: Royer tube mic
« Reply #4 on: January 15, 2018, 06:08:17 AM »
These days we don't see DIY like this any more. Cool.
thanks.
I'm just mostly too cheapskate to buy bodykits
and since I have acces to lathe and tools at local school then why not try to make them myself :)
« Last Edit: January 15, 2018, 06:16:12 AM by kooma »

kooma

Re: Royer tube mic
« Reply #5 on: January 15, 2018, 06:27:28 AM »
I'm still working on getting the mic's background noise as low as possible;
I place the mic in a "quiet" place and crank  gain on preamp to full..
first modifying groundings on mic on psu got noise down about 10dB.
then ripping my psu back to basic and slowly adding capacitance and coils got me few dB'slower.

attached current version of psu.
all this filtering on HV compared to basic royer voltage tripler psu dropped noise only 1-2dB,
while on the heater side difference was more drastic.

kooma

Re: Royer tube mic
« Reply #6 on: January 22, 2018, 03:22:43 AM »
Finished PSU.
with previous build I didnt notice any noise with same kind of psu,
but maybe I was just too paranoid with this build;
Funny that that first I had grounding issues->psu didnt make much difference.
once that was fixed I noticed the  mic grille mesh was too open and it was picking rfi/emi.
after all that was fixed I noticed small improvement in noise with choke added in heater supply
and thats what I ended up with.

KrIVIUM2323

Re: Royer tube mic
« Reply #7 on: January 22, 2018, 03:58:52 AM »
Very nice build! Bravo. 8)

kooma

Re: Royer tube mic
« Reply #8 on: January 22, 2018, 04:01:30 AM »

ln76d

Re: Royer tube mic
« Reply #9 on: January 24, 2018, 06:35:20 AM »
Nice 8)

That's the diy spirit!


vitopower

Re: Royer tube mic
« Reply #10 on: June 03, 2018, 12:35:48 AM »
This is really cool, Kooma, any chance you could re-upload the pics?