GEEZER1
190 posts
Jul 08, 2013
5:42 PM
|
Can anyone tell me what parts I need to convert a shure 520 slb low z ohms microphone model s36 stand 99c86mk green bullethand into a held mic? I have two of these and wish to convert the best one.
Last Edited by GEEZER1 on Jul 08, 2013 5:50 PM
|
Harpaholic
281 posts
Jul 08, 2013
6:01 PM
|
Convert to what? Hi Z? If so you need a transformer, you can find them on Ebay. I typically silicone the transformer inside the shell. You can also buy a Shure line matching transformer like the A95UF.
If you want to add a Switchcraft 2501mp connector I would recommend you send it to someone that does it the right way by drilling and taping the hole for the 2501mp or you can ruin a good mic shell.
I've always done it this way but I only do custom orders and repairs as a hobby. I'm pretty sure Greg H does it this way as well as Jeremy Snell?
|
GEEZER1
191 posts
Jul 08, 2013
7:39 PM
|
Thanks Harp, I will look through my old ham radio parts and find a connector, if I don't have one I will try to order one. Thanks a lot...Geezer
|
arnenym
162 posts
Jul 09, 2013
12:51 AM
|
A impedance transformer often make the mic feedback prone. It's better to look after a CM element on Ebay. Or let a professionell mic builder do the job. You get a better mic you can use with confidence.
Last Edited by arnenym on Jul 09, 2013 12:53 AM
|
didjcripey
576 posts
Jul 09, 2013
3:37 AM
|
Built a few low z shure cms into bullet shells with transformer; I haven't found them any more or less feedback prone.
Simplest way to do it is remove mic from stand (don't force it there is a screw to release) and hard wire it, no need for a connector, just a transformer (shoot for around 1kohm impedance with transformer) and a 1/4" phone jack at the end of the lead.
Knot the lead inside the shell so there's no strain on the solder joints, make sure to earth the shell and you're away.
----------
Lucky Lester
Last Edited by didjcripey on Jul 09, 2013 3:45 AM
|
Greg Heumann
2251 posts
Jul 09, 2013
8:43 AM
|
"A impedance transformer often make the mic feedback prone. "
Not sure where this statement comes from but in my experience it isn't true. Depending on the system an IMT MAY change the output level, up or down. If it makes the mic hotter then it will be more likely to feedback if you don't adjust the amp's volume to compensate - but shouldn't make a big difference if you do.
----------
***************************************************
/Greg
BlowsMeAway Productions
See my Customer Mics album on Facebook
BlueState - my band
Bluestate on iTunes
|
Rick Davis
2085 posts
Jul 09, 2013
11:31 AM
|
I have not found that a impedance transformer will make a mic more feedback prone.
----------
-Little Rick Davis
The Blues Harp Amps Blog
The Mile High Blues Society
Tip Jar
|
arnenym
163 posts
Jul 09, 2013
12:35 PM
|
I wrote "often" because if you don't match the element with the transformer it goes wrong very easy.
I build my statement on my experience from Lo-z mic's i have customized with transformers. I compared them to CM HI-z and original Hi-Z mic's with built in transformers.
A original mic with transformer such as a 545 or EV 6## mic is build by professionals and it matched after very careful calculations.
A Lo-z element could vary in resistance. One element could sound great and the other just scream with the same transformer.
That's my experience. If you have other experience it´s okey for me.
I still think it's best to use a original Hi-z element or a mic built by a professional customizer.
|
bloozefish
113 posts
Jul 10, 2013
2:26 PM
|
I've found that the true Lo-Z CM elements (showing about 15 ohm resistance) work very well with an internal transformer, but the mid-Z ones (around 150 ohm) don't sound so good. Anyone else concur?
james
edit: if I recall correctly, the 99C CMs are mid-Z, but I'm not positive.
Last Edited by bloozefish on Jul 10, 2013 2:27 PM
|
Ray
440 posts
Jul 10, 2013
4:36 PM
|
99C86 is Low-Z 15 ohm Mid-Z is 100-300 ohm. Found it here.
http://www.greenbulletmics.com/DATING_the_ELEMENTS.html
Last Edited by Ray on Jul 10, 2013 4:36 PM
|
didjcripey
579 posts
Jul 10, 2013
5:02 PM
|
Impedance varies from element to element.
Stick it on a multimeter and find out for sure (they're cheap as chips)
Just don't do it with a crystal element
----------
Lucky Lester
|
