Taperssection.com

Gear / Technical Help => Ask The Tapers => Topic started by: nigelsh on May 10, 2009, 11:03:33 PM

Title: CA STC-11 > CA-9100 - non symmetrical recording
Post by: nigelsh on May 10, 2009, 11:03:33 PM: Hi I'm hoping that someone can suggest a possible reason why a recording would go 'non-symmetrical' part way through. If you look at the attached picture you will see that my recording is fairly evenly spread above and below zero until approximately 53 minutes in - at that point the sound below the zero midpoint is significantly less than that above zero.

I've noticed this phenomena in most of my recent recordings but have no idea what might be causing it - hence my hope that someone here may be able to suggest what might be wrong.

Thanks
Nigel
Title: Re: CA STC-11 > CA-9100 - non symmetrical recording
Post by: heyitsmejess on May 11, 2009, 04:28:19 AM: the battery in the preamp is dying.

are you using rechargeables?
Title: Re: CA STC-11 > CA-9100 - non symmetrical recording
Post by: nigelsh on May 11, 2009, 09:11:25 AM: yes, I'm using a rechargeable 9v battery. I'll try my next show with a new battery - thanks for the suggestion
Title: Re: CA STC-11 > CA-9100 - non symmetrical recording
Post by: Belexes on May 11, 2009, 09:19:19 AM: Chris Church doesn't recommend those rechargable 9 volts. You can get a lot of hours out of one new, non-rechargable.
Title: Re: CA STC-11 > CA-9100 - non symmetrical recording
Post by: nigelsh on May 11, 2009, 10:02:44 AM: I'm glad I mentioned that I was using a rechargeable! I'll try a regular 9v for my next show on Wednesday. Thanks
Title: Re: CA STC-11 > CA-9100 - non symmetrical recording
Post by: Chaosu on May 15, 2009, 03:16:12 PM: Quote from: Belexes on May 11, 2009, 09:19:19 AM
Chris Church doesn't recommend those rechargable 9 volts. You can get a lot of hours out of one new, non-rechargable.

It's more like he doesn't recommend common 8.4V accu, You just have to look for 9.6V one.
Title: Re: CA STC-11 > CA-9100 - non symmetrical recording
Post by: sst4270 on May 15, 2009, 05:07:19 PM: Such as this?

http://www.amazon.com/Maha-PowerEx-MH-96V230-Battery-rechargeable/dp/B0002LAKOS
Title: Re: CA STC-11 > CA-9100 - non symmetrical recording
Post by: Church-Audio on May 15, 2009, 05:15:06 PM: Quote from: sst4270 on May 15, 2009, 05:07:19 PM
Such as this?

http://www.amazon.com/Maha-PowerEx-MH-96V230-Battery-rechargeable/dp/B0002LAKOS

Yes this one is very good. I recommend it to all of my customers it saves money in the long run and its better then throwing batteries in a landfill.

Chris
Title: Re: CA STC-11 > CA-9100 - non symmetrical recording
Post by: sst4270 on May 15, 2009, 05:42:09 PM: Just found this...

http://www.batteryjunction.com/tpeh-t9-6v260.html

Anyone have any experience with them, yet?
Title: Re: CA STC-11 > CA-9100 - non symmetrical recording
Post by: nigelsh on May 15, 2009, 05:45:05 PM: Thanks to everyone who has responded. A regular 9v battery fixed my problem - but now I'll probably pursue one of these 9.6v rechargeables

Nigel
Title: Re: CA STC-11 > CA-9100 - non symmetrical recording
Post by: heyitsmejess on May 15, 2009, 07:30:04 PM: i run my 9100 open alot. when i do, i rigged up a connector so i can use a 9.6v RC battery. ive let it run for 18 hrs straight at a festival and STILL had plenty left to record for a week straight.
Title: Re: CA STC-11 > CA-9100 - non symmetrical recording
Post by: Jeremy Lykins on May 15, 2009, 07:46:07 PM: Quote from: heyitsmejess on May 15, 2009, 07:30:04 PM
i rigged up a connector so i can use a 9.6v RC battery.

That's pretty awesome. You should make a DIY thread about that and put a link to it into the Team Church thread. I'm sure that a lot of people would be interested in learning how to do that, even if they don't end up doing it.
Title: Re: CA STC-11 > CA-9100 - non symmetrical recording
Post by: heyitsmejess on May 15, 2009, 09:31:52 PM: i would have to take some pics, but it was easy! let me get the parts again, and ill do a full tutorial