Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Instruments and Amps Everything that makes music, Especially including instrument amps.

Basic DIY microphones
Basic DIY microphones
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 18th September 2019, 01:45 AM   #61
PRR is offline PRR  United States
diyAudio Member
 
PRR's Avatar
 
Join Date: Jun 2003
Location: Maine USA
> has a small 1:1 transformer inside

Are you sure?

I had the impression it was like 10:200 step-up. The coil is easier to wind to low impedance, but medium impedance is better for long lines. And I think I have seen people bypass the tranny, getting a very low output voltage but ample when used on LOUD sources.
  Reply With Quote
Old 18th September 2019, 02:27 AM   #62
benb is offline benb  United States
diyAudio Member
 
Join Date: Apr 2010
Basic DIY microphones
Quote:
Originally Posted by PRR View Post
> has a small 1:1 transformer inside

Are you sure?

I had the impression it was like 10:200 step-up. The coil is easier to wind to low impedance, but medium impedance is better for long lines. And I think I have seen people bypass the tranny, getting a very low output voltage but ample when used on LOUD sources.
No, you're probably right. It's been a few years (decade or two) since I opened op a SM-57. But I do remember it's small. :-)
  Reply With Quote
Old 18th September 2019, 03:11 AM   #63
PRR is offline PRR  United States
diyAudio Member
 
PRR's Avatar
 
Join Date: Jun 2003
Location: Maine USA
> it's small. :-)

What is the Power out of a dynamic microphone?

I figure like 0.02 milliWatts. Stands to reason it could be much smaller than the 100mW transformer from a pocket radio.
  Reply With Quote
Old 18th September 2019, 03:46 AM   #64
dotneck335 is offline dotneck335  United States
diyAudio Member
 
Join Date: Dec 2012
Quote:
Originally Posted by PRR View Post
> has a small 1:1 transformer inside
Are you sure? I had the impression it was like 10:200 step-up. The coil is easier to wind to low impedance, but medium impedance is better for long lines.
That can't be right, if I am figgerin' correctly----a Shure SM-57/58 is listed as a 310Ω source impedance; a 20:1 transformer would then have to have a 0.775Ω coil to appear as 310Ω. I don't think they wind them THAT low.
  Reply With Quote
Old 18th September 2019, 03:53 AM   #65
benb is offline benb  United States
diyAudio Member
 
Join Date: Apr 2010
Basic DIY microphones
Yeah, but I've seen these larger audio transformers on some preamp inputs, they're big enough so the magnetics don't saturate with a large low-frequency signal. But then those also carry the signals from a LDC condenser which have a lot more output than a dynamic mic.
  Reply With Quote
Old 18th September 2019, 07:29 AM   #66
Gnobuddy is offline Gnobuddy  Canada
diyAudio Member
 
Join Date: Mar 2016
Quote:
Originally Posted by dotneck335 View Post
...that's EXACTLY what the Bose "Hi-Fi" speakers always sounded like, to me......
I'll take your word for it - I've never had the dubious pleasure of listening to any of the Bose "Hi-Fi" speakers.


-Gnobuddy
  Reply With Quote
Old 18th September 2019, 08:35 PM   #67
PRR is offline PRR  United States
diyAudio Member
 
PRR's Avatar
 
Join Date: Jun 2003
Location: Maine USA
> a 20:1 transformer

Impedance. Not voltage. Sorry for the ambiguity.
  Reply With Quote

Reply


Basic DIY microphonesHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Microphones GerardLardner PA Systems 7 26th February 2019 05:48 AM
DIY microphones regiregi22 Analogue Source 27 3rd March 2014 06:22 PM
Microphones lpd Swap Meet 0 29th February 2012 03:11 AM
Which Microphones, When, Where? abrogard Everything Else 0 16th September 2011 04:24 AM
SPL microphones? thylantyr Multi-Way 3 18th June 2005 06:19 PM


New To Site? Need Help?

All times are GMT. The time now is 06:07 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki