Royer MXL Tube Mod, Is there any way to do this nowadays?

bluesbaz · Post by **bluesbaz** » Tue Aug 18, 2009 11:07 pm

Anyone with some help on that lundhal issue?

johnnydove · Post by **johnnydove** » Tue Aug 18, 2009 11:39 pm

what exactly are you having trouble with?

bluesbaz · Post by **bluesbaz** » Wed Aug 19, 2009 1:21 am

This makes it seem like i am supposed to connect 7, E, 6, and 5 all together
does that seem right? Or, could it be 7 to 5, and E tied to 6 get feed by the output of R5

audiophreak · Post by **audiophreak** » Wed Aug 19, 2009 5:28 am

Hi,

From the data sheet at K&K audio, Jump Pins 1 and 4, pin 1 is Audio (-) out, Jump Pins 2 and 3, pin 3 is Audio (+) out, Pin 8 is audio in from coupling cap,jump pins 5 and 7, jump pins 6 and E to shield ( Earth ground ).

Hope this helps,
Chip

Nate Dort · Post by **Nate Dort** » Wed Aug 19, 2009 5:29 am

Tie 1 & 4, that goes to pin 2 of your XLR male output (Yellow).
Tie 2 & 3, that goes to pin 3 of your XLR male output (Orange).
8 is your positive input from C8 (Green)
6 goes to ground (Red)
Tie 5 and 7 (Blue & Brown)
E (earth) goes to ground

audiophreak · Post by **audiophreak** » Wed Aug 19, 2009 5:31 am

...Bluesbaz..you beat me to it, with diagrams no less..

Nate Dort · Post by **Nate Dort** » Wed Aug 19, 2009 5:32 am

audiophreak wrote:Hi,

From the data sheet at K&K audio, Jump Pins 1 and 4, pin 1 is Audio (-) out, Jump Pins 2 and 3, pin 3 is Audio (+) out, Pin 8 is audio in from coupling cap,jump pins 5 and 7, jump pins 6 and E to shield ( Earth ground ).

Hope this helps,
Chip

1 & 4 are positive, not negative.

bluesbaz · Post by **bluesbaz** » Wed Aug 19, 2009 6:53 am

Thanks guys!

audiophreak · Post by **audiophreak** » Wed Aug 19, 2009 5:51 pm

Hey Nate and All,

Quote from the original Royer article : " Do note though, that the audio signal at the cathode of a cathode follower microphone will be out of phaze ( the capsule flops the phaze ), so allowances will need to be made. "

... so that's why I have mine wired pins 4-1 (-) , and pins 2-3(+). at the trans.

b3groover · Post by **b3groover** » Wed Aug 19, 2009 8:50 pm

Snarl 12/8 wrote:
b3groover wrote:http://www.organissimo.org/pub/FTLOAW.mp3
Turn that organ up about 3db in that mix!

Heh.

What's funny is I was thinking the same thing, but that was just my rough reference mixes. The tracks where taken to a pro studio for mixing and the organ was actually pushed WAY far back.

http://www.cdbaby.com/cd/gregnagy

It's track 2.

But hey... not my record. I just tracked it (and played the organ!)

It's a very good record and I'm proud of it. The organ isn't the centerpiece anyway.

Still loving the tube mod'd 603s.

Snarl 12/8 · Post by **Snarl 12/8** » Wed Aug 19, 2009 11:19 pm

Well, with git and vox it's a bit of a different story. Still could use more organ, more like 6db on that final thing. Good tracks. They come off a little strident, I feel, in the final mix. I often feel that way about that sort of blues though. I guess that's a style. I like my blues way dirtier.

audiophreak · Post by **audiophreak** » Thu Aug 20, 2009 6:13 am

Hi All,
Not sure if any of you saw my post from awhile ago, thought I might post it here as well.
unfortunately my brother-in-law got laid off so I had to go to another machine shop to have these made, so the price went up.
I have made an Adapter that screws on the MXL 603 mic body and allows you to use any AKG CK series capsule or any Bayonet style capsule, Blue,Red, Neumann etc.
They are made of Stainless steel, delrin insulator and a brass or beryllium/copper center contact.
Cost would be $68.00 each , shipping INCLUDED.
I have used all the capsules pictured with my Modded 603's and they sound AWESOME ! Very Happy

http://picasaweb.google.com/audiophreee ... uleAdapter#

.... some other stuff .....

1.) MXL 603s have 3-- thats right THREE different bodys styles/styles....all the threads are the same)

One is the original body style with the three tiny little screws that secure the body tube to the connector base
I found a second style - the " MXL 603 Mogami " - and the Body tube on THIS one is BRASS and THREADS on to the connector base... MUCH BETTER!
And yet a third style that is like the second but it does not say "Mogami" and the label or badge is PRINTED on the body tube not embosed or engraved like the first two. :Smile

2.) I just finished a Gyraf G9, my first lage project and it KICKS ASS !!! - Thanks Jacob - anyway, I had these PCB mount screw connectors hanging around, and had an Idea.... the perf board I had was the right spacing and the connector fit, and it also fit inside the body tube, I just hot glued it to the perf board ..making a socket for the tube, I used a 5703wb tube and copied the C60, but with the pin combining of the 5840 in this and Royers circuit it makes for a nice tiddy Mod without having to fly the leads over, under and around, you just run the wire from the connector to the terminal pins. - sweet right? Wink

Here is a link to show the differences, I left the one w/ the printed label out because other than that, its no different than the brass threaded one

http://picasaweb.google.com/audiophreee ... directlink

all the best,
Chip

Hey b3groover, good to see/hear from you, hope all is well.

Skipwave · Post by **Skipwave** » Thu Aug 20, 2009 8:51 am

Nice work Chip!

That adapter might be the thing to push me into doing up a pair of 603s. I've built the Royer cathode follower circuit into an LD MXL and like it a lot. It is just different in a useful way from the standard common cathode 5840 circuit. I do need to experiment with more of the available transformer options. Right now mine all have Cinemags.

audiophreak · Post by **audiophreak** » Thu Aug 20, 2009 9:55 am

Thanks Skipwave !

I have not tried the Cinemags, I used the jensens in the MXL 2001s and the Lundahls in the 603s.

As b3groover states the tube mod turns the 603s in to a whole new mic, the stock capsules sound fine, but I like to have options and the AKG CMMS CK series of capsules are proven timeless capsules, also being able to put on a LD capsule just opens up the possibilities of uses and sound great too.

vintageblue · Post by **vintageblue** » Sat Aug 22, 2009 11:18 am

audiophreak wrote:Hi,
I have been "Lurking" around here for a few months and have gotten a lot a great information on all kinds of things and I want to thank you all.
I have now completed two MXL 2001 mods and almost done with a pair of 603s.
The first 2001 has a ck12 reissue and the second has a Neumann K67 - ( witch fits nice in the stock MXL saddle ). They both sound awesome.
The 603s I used a 5703wb tube and copied the circuit from my AKG C60, and am waiting for a pair of output transformers from Oliver at AMI- TAB/Funkenwerk.
Here are some pics of my work, all questions and comments welcome.

http://picasaweb.google.com/audiophreeek/MicModEdit#

Thanks again to you all for helping make this a FUN, learning experience.

General Parts List

2001 PSU box from Circuit Specialists #LA-5 about $14
603 PSU box from Allied Electronics #EX-4521 about $26
IEC fused chassis mount power connector from Parts Express #090-443 about $1.64
Switchcraft 5pin xlr chassis mount from Surplus sales of Nebraska about $4
Tubes from Triode Electronics Inc. 5840w- $6 and 5703wb - $7
Wall transformer for 603s from Jameco #10102 about $14

Thanks again,
Chip

So then this mod is good for a stock M-Audio Nova LDC? This would be my first foray into anything this extensive. I've only made/modded guitar pedals for friends prior to this. Is there an all inclusive parts list somewhere?

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Royer MXL Tube Mod, Is there any way to do this nowadays?

anyone?

To clarify my question

thanks

Re: Yes, you can do the Royer MXL Mic Mod these days

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