R/E/P Community

Please login or register.

Login with username, password and session length
Advanced search  

Pages: 1 2 [3] 4 5   Go Down

Author Topic: SM57 mod  (Read 20559 times)

maxdimario

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 3811
Re: SM57 mod
« Reply #30 on: December 13, 2005, 06:29:18 am »

DivideByZero wrote on Wed, 07 December 2005 22:16

12-13Ω on a bare 545 (57) capsule.


M



is that actual impedance at 1000Hz or DC resistance??
Logged

compasspnt

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 16266
Re: SM57 mod
« Reply #31 on: December 13, 2005, 09:33:27 am »

maxim wrote on Tue, 13 December 2005 05:30

terry wrote:

"Like an SM7, only better"

and quite a bit cheaper!

i'm definitely going to try this one


Max,

I was not claiming that a de-trans'd 57 could replace an SM-7 in all respects.  Part of the 7's sound is the "cage" surrounding it, and part of its sound is the humbucker winding in series, coupled with the passive inductor based onboard EQ (learned from maxdimario on Fletcher's 'SM-7 v. RE-20' thread yesterday).

But the general sound was reminiscent.
Logged

Tidewater

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 3816
Re: SM57 mod
« Reply #32 on: December 13, 2005, 03:40:59 pm »

Imp @ 1k


M
Logged
Time Magazine's 2007 Man of the Year

Joe Crawford

  • Full Member
  • ***
  • Offline Offline
  • Posts: 107
Re: SM57 mod
« Reply #33 on: December 14, 2005, 01:07:59 pm »

Does anyone know where to find the R
Logged

compasspnt

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 16266
Re: SM57 mod
« Reply #34 on: December 14, 2005, 03:08:11 pm »

I got mine in Australia, so not sure about US.

I suggest calling a good dealer which carries R
Logged

maxdimario

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 3811
Re: SM57 mod
« Reply #35 on: December 14, 2005, 03:30:22 pm »

I just did one and am pleased with the sound, but I am afraid that the impedance is too low for a normal mic transformer.

I'm going to solder two 68 ohm resistors in series with each leg of the capsule and see if that calms the highs down a bit.

68+68+mic coil= roughly 150 ohms.

I have no sm7 to compare with, level wise.. are the levels similar?

if the sm7 is higher that would mean a higher amount of turns on the sm7 coil.


.... you can also pass the two wires inside a ferrite bead, to cut down some of the RF that may get into the signal from the capsule.
Logged

hrasco

  • Newbie
  • *
  • Offline Offline
  • Posts: 11
Re: SM57 mod
« Reply #36 on: December 14, 2005, 05:23:47 pm »

Found naked D-Power here:

http://www.frontendaudio.com/Rode_D_Power_Internal_In_Line_P ower_for_Dynamic_Mi_p/3427.htm

Hank
Logged
http://img.photobucket.com/albums/v311/tarmadilo/TeamInterstate2.gif " border=0 alt=" http://img.photobucket.com/albums/v311/tarmadilo/TeamInterstate2.gif ">

Synth Tuba Tech

Joe Crawford

  • Full Member
  • ***
  • Offline Offline
  • Posts: 107
Re: SM57 mod
« Reply #37 on: December 14, 2005, 05:33:38 pm »

hrasco wrote on Wed, 14 December 2005 17:23

Found naked D-Power here:

 http://www.frontendaudio.com/Rode_D_Power_Internal_In_Line_P ower_for_Dynamic_Mi_p/3427.htm

Hank


Thanks, that's just what I was looking for.  Think I'll order a couple to play with.

Joe
Logged

maxdimario

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 3811
Re: SM57 mod
« Reply #38 on: December 14, 2005, 08:00:37 pm »

I put the resistors in series, and that tamed the highs a slight  bit, but this mic sure is bright without the rolloff of the transformer, and the proximity effect is back into the equasion.
the mod also affects the voicing of the mic on a freq. response level..

very clean highs though in comparison, and real live sounding...

I'm curious to know how it affects its placement in a working situation, anyone out there recorded their modded 57's yet?
Logged

Revolution

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 364
Re: SM57 mod
« Reply #39 on: December 14, 2005, 09:10:59 pm »

I've just done this mod only taking out the transformer and was ok with output level into my JLM 1290 (neve clone).

Have used it on 2 sessions.

I used it where I would normaly use a beta 57.

1) guide vocal track worked extreamly well.

2) close mic JCM800 sounded good.

3) top of snare wasn't to happy with snare sound but the snare itself I didn't like either.

4) close mic MessaBoogie rectifier ran quickly back to my Beta 57 which sounded better.

My conclusions would be that maybe a replacement transformer or the Rode DPlug could improve things but not 100% sold.

McAllister

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1145
Re: SM57 mod
« Reply #40 on: December 15, 2005, 12:37:40 am »

Did more tracking tonight: vocals through a RNP and acoustic guitar through some Decca pres.

Diggin' it. Mostly I am amazed at how un-57 it sounds.

M
Logged
Only put off until tomorrow what you are willing to die having left undone.

Tidewater

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 3816
Re: SM57 mod
« Reply #41 on: December 15, 2005, 01:12:17 am »

The Rode thing.. if I only wanted 10db back, can that be modified?

Think?

It'd be cool to have selectable gain, as most preamps have a sweet spot, and you could really work that, especially for snares, and guitars.


M
Logged
Time Magazine's 2007 Man of the Year

Vertigo

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1334
Re: SM57 mod
« Reply #42 on: December 15, 2005, 10:32:10 am »

I'm using mine for snare bottom now (with an un-modded 57 taped to a D19c on top). In this application it's a definite improvement - I don't need to boost high end on the snare much at mixdown and it really defines the bottom head and the strands.

I usually use a 57 combined with an M-160 for close mic'ing distorted guitar cabs (Recto's, JCM's, etc). In my opinion the purpose of the 57 in this application is to catch those aggressive upper mids, which are scooped in the modded version. So in this application I prefer the unmodded 57, although the modded one is certainly usable.

Very condenser-like for vocals, but a bit too high-endish for my RNP (when it works an unmodded 57 through an RNP is one of my favorite vocal combos). Sounds great through the PM1k and my console pre's though.

I'm thinking these modded guys are intended for drums. I'm going to try to do some experimenting on kick, snare top, and toms this weekend. If I get around to modding another I'll try them on overheads too, which might sound a little lo-fi but I'm thinking the modded 57's could definitely handle the high-end.

-Lance
Logged

Johnny B

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1134
Re: SM57 mod
« Reply #43 on: December 16, 2005, 02:49:57 pm »

Re: The Transformer Project Box

Ok, so now we have a crappy little transformer removed from the mic...

Would it be possible to re-use it in a project box? Or did the boiling wreck the little beast?...Hmmm

And in that project box could you also have say transformers from
Lundahl, Cinemag, Jenson, Rode, and even the old one you took out?

So that is what? 5 transformers in one box...a five- or six-position switch...(one switch position for bypass)....a male and female XLR and you pretty much have it...

Now one of the cool things about such a project box is that you could really see and hear how transformers color your sound...

Now I wonder if anyone around here is brilliant enough to design such a box and share the layout with others....heh...heh



Logged
"As far as the laws of mathematics refer to reality,
they are not certain; as far as they are certain,
they do not refer to reality."
---Albert Einstein---

I'm also uncertain about everything.

compasspnt

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 16266
Re: SM57 mod
« Reply #44 on: December 16, 2005, 04:02:23 pm »

Shouldn't take a Rocket Surgeon to design such a box (apologies to Fletcher).  Expensive, though.

My resident tech genius tells me a Sowter 8754 might be just the thing.  I think perhaps a 9760 also.

Terry
Logged
Pages: 1 2 [3] 4 5   Go Up