Shure 97U29 / S-36

[KM5WX]

I think I asked this before but I'm not sure so bear with me. Thanks. This is a desk mic that was on a Motorola business band rig back in the 70's. I belive the 97U29 is the model number and the S-36 is the stand. What I want to know is what the inpedance is and is it dynamic, electret or what? If it's a decent mic I might try it on my Kenwood hybrids. Thanks again, and I believe I have at least one electro-voice 638 I may sell if the price is right. Make me an offer! Richard KM5WX@bellsouth.net

[W9GB]

Yes, you asked this question on April 15, 2012 at eHam.net Boatanchor forum
http://www.eham.net/ehamforum/smf/in...?topic=82379.0

The 1950s era model 97u29 refers to the Shure 510MD Hercules and S36 stand which were sold as
the Fixed-Station Dispatcher microphone to many LMR mfg (GE, RCA, Motorola, etc.).

Shure 410 and 510 series -- Manual
http://www.shure.com/idc/groups/tech...pro_410_ug.pdf
Shure 510MD series -- Manual
http://www.shure.com/idc/groups/publ...o_510md_ug.pdf

Shure made this Style in TWO versions,
a MID-Z, 4,000 ohm (Rudak), Controlled Reluctance element and

a HIGH-Z 100,000 ohm (Hercules), Controlled Magnetic element.

Current Shure classic designs (in production)
http://www.shure.com/americas/products/microphones

This microphone can be found on many web sites.
http://vintagemike.wordpress.com/201...c-model-97u29/

PHOTOGRAPHS are more useful in positive ID of OEM microphones.
97u29.jpg

[KM5WX]

Thanks Greg, I thought I had asked before but the short term is gone if you know what I mean!!HIHI Thanks for the info. The mic was in a box when I got it. It's in real nice shape so I thought I'd look for a use for it. Thanks again es 73 Richard

[W9GB]

The mic was in a box when I got it. It's in real nice shape so I thought I'd look for a use for it.

It would be a nice microphone for that Vintage look of a 1950s amateur radio station.
Now you need that classic Boatanchor to pair with it !

[KM5WX]

Well I have a Drake RV-4c with the rv-4 remote vfo. The ms-4 speaker and matching power supply. Or several Kenwood hybrid rigs. Which do you suggest. Oh I just noticed it's low impedance. What will happen if I try it. no work or work poorly? Thanks again Richard KM5WX

[W9GB]

I just noticed it's low impedance.

Did you actually look at the internal Shure sticker on the microphone element,
to see which one is installed?

IF it is a low impedance mic element, What will happen if I try it?
No work or work poorly?

Whether the electromagnetic wave is 60 Hz power frequency; audio/music (200-20,000 Hz) or
Radio Frequency (RF) ... it is just a matter of "impedance matching" !!

For audio, you use audio transformers. Heil sells he XT-1 for this purpose.
Mouser has catalog pages on various models.