Tiny stereo preamp???

  • Thread starter Thread starter guitarlover
  • Start date Start date
Hi,

I think I've figured out how to post a link for the pictures of the completed preamp.


http://members.buckeye-express.com/sfbrown/preamp_interior.jpg

http://members.buckeye-express.com/sfbrown/preamp_frontpanel.jpg

Hope these work.

The circuit boards were made by Velleman. They are a Belgian company with distribution in North America.

Regards, Steve :D

Just checked and the links work. BTW, the on/off is a pushbutton so I put in the light so I know when it's on. It's a panel mount LED rated at 12V. It works just fine at 9V.
 
Richard Monroe said:
Here goes-

http://www.musiciansfriend.com/srs7...8502580/g=home/search/detail/base_pid/189100/
Click to expand...

Cool. Thanks, I didn't know there was anything like this for audio. I've used them in ham radio but they operate at RF. Impedance matching is very common at high frequency. I would be interested to know what the losses are through the system. It may not matter with audio but no transformer is 100% efficient. I could very well be wrong but it may just result in a SLIGHTLY higher level of amplification somewhere else in the signal chain. Once again, it may not matter with studio based audio. This is all still relatively new to me.

Thanks again Richard, I guess you can teach an old dog new tricks.

Regards, Steve
 
That's cute, that's gotta have worked out better than spending all that money on a branded one!
 
I had more fun with the ECM-MS957 today. I finally managed to cobble together enough adaptors and weird cables to get from a 1/8" miniplug to 2 unbalanced male XLR's, and plug this puppy into my Avalon. At first, I was shocked by the brutal hum and the easily visible noise floor on both channels. Then, when I matched the input gain on the 2 channels, the visible noise floor remained, but the hum...was gone! It appears this mid-side mic reverses the phase internally, so that it puts out 2 signals with the phase already reversed. I'm slowly beginning to understand this mid-side phase reversal thing. On playback, if you change the gain on either track, you immediately get hum, but whrn the output gain is matched, it's as quiet as a grave.
Furthermore, the sound is *excellent*. What a weird mic. Somebody else said they found this mic very noisy, but a couple days later, they came back and said it was the preamp. To whoever that was- take note. Match the gain on the two stereo channels, and the noise will cancel itself out.-Cool-Richie
 
You must log in or register to reply here.
Back
Top