Taperssection.com
Gear / Technical Help => Battery Boxes, Preamps, Mixers, ADCs, and Processors => Topic started by: austaper on September 28, 2007, 10:41:21 PM
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Anyone have any info on how many hours you can go before you need to change out the battery? Will it matter where the gain is set? Mostly I am powering the Church Audio cards but sometimes I am running Nak 100's with batteries in them.
Some other posts have mentioned green and red lights. I have the version with 1/8" stereo mini input. It shows a red light on the left side of the gain knob when turned on. There is another light on the other side of the knob that I have not seen come on. I assume it is a clip indicator.
I have done 8 hours using the cards and some gain without problem but I would love to know whether there was more life in the battery or if I did the right thing by changing. Any feedback would be appreciated.
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why is ~40 hours coming to mind?
ah, there it is... "The battery draw is about 10mA so expect about 40 hours of use from your preamp."
http://taperssection.com/index.php/topic,80892.msg1119618.html#msg1119618
searched on... 9100 battery hours
and yes, that light is a clip light.
don't you just love that little preamp?
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The new version 3 draws about 15mA at full output level.. This preamp will operate on 7 volts if need be.
Chris
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I nice feature to add to the 9100 would be a DC jack on the front, with a charging circuit for nimh 9v's!
I
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The new version 3 draws about 15mA at full output level.. This preamp will operate on 7 volts if need be.
Chris
Is there a way to tell the version of a preamp just by looking at it? (I bought a used one from Richard M).
And/or, will the older versions simply not power up on 7V or will they run with reduced performance?
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The new version 3 draws about 15mA at full output level.. This preamp will operate on 7 volts if need be.
Chris
Is there a way to tell the version of a preamp just by looking at it? (I bought a used one from Richard M).
And/or, will the older versions simply not power up on 7V or will they run with reduced performance?
All of the 9100's will power up on 7 volts but they will not perform well on anything less then 7.5 volts.
I dont know what version Richard M has Pm his last name to me I might be able to look it up.
Chris
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Chris, I bought my 9100 pre from you last june, would that be version 3? Harold May
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Chris, I bought my 9100 pre from you last june, would that be version 3? Harold May
I would say its probably is if it has a red LED it will be a version 3.0
One place to look is under the pad in the battery compartment. Some of them have a 3.0 marked in there some have it under the Church Audio label. And sadly some are not marked at all. It all depended on how busy I was when they were going under final assembly.
Chris
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Mostly I am powering the Church Audio cards but sometimes I am running Nak 100's with batteries in them.
I have the version with 1/8" stereo mini input.
Hey austaper,
I just got myself a set of Nak 100's, so I'm curious to know your setup, since I've been planning to get the 9100 too.
Are the 100's stock or modded? How do you power them, just 1.5V internal, or higher voltage (as suggested here: http://taperssection.com/index.php/topic,61569.msg1289627.html#msg1289627)
Also, what connector do you use for plugging them into the 9100?
The stock cables are XLR >individual 1/4" mono plugs.
Do you use a Y-adapter like this: http://www.hosatech.com/hosa/products/ymp-137.html
Or did you replace the entire cables with a Dual XLR > 1/8" stereo cable instead: http://www.fullcompass.com/product/287015.html
/Jan
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I'm only bumping this thread as I was searching for battery life for my 9100 and was worried that 12-14 hours (three shows) would be too much. I'll stop worrying now - though will still replace it way before 40 hours. Thanks for the info guys!
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I'm only bumping this thread as I was searching for battery life for my 9100 and was worried that 12-14 hours (three shows) would be too much. I'll stop worrying now - though will still replace it way before 40 hours. Thanks for the info guys!
My tip. Just measure voltage in the 9 V cell before going to the show. Anything below 8,2 Volts means DANGER for me.
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Chris, I bought my 9100 pre from you last june, would that be version 3? Harold May
I would say its probably is if it has a red LED it will be a version 3.0
One place to look is under the pad in the battery compartment. Some of them have a 3.0 marked in there some have it under the Church Audio label. And sadly some are not marked at all. It all depended on how busy I was when they were going under final assembly.
Chris
Hey Chris. A nice mod might be to put a female 'banana' type jack on the case. Connect to postive battery (through a resistor). Then you could measure voltage on the battery from the positive connector to the shield of the miniplug. No opening of package necessary. I think Shure did this with some early versions of their preamps. Useful for measuring both off and loaded voltages of the battery as well. Hey, I might add this to my own preamp eventually.
Richard
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To you guys who are running Naks > CA 9100 pre...
I'm curious how well (how long) that works... basically that CA pre puts out 9V for plug-in-power, which the Naks don't need. In fact with the transformer at the tail of the Nak body you have a dead short across the PiP circuit, which I figured would burn out the preamp, and so did Chris. I know there is a thread about that here somewhere.
Did you (a) just do it, and it seems to work fine for a whole show, or (b) you only did it for a minute as a test, or (c) you installed current blocking caps in line?
I'd have done it if I thought I could have gotten away with it...
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My tip. Just measure voltage in the 9 V cell before going to the show. Anything below 8,2 Volts means DANGER for me.
Good point! Coincidentally, I have just received my latest batch of batteries and a handy little battery tester . Thanks.
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Chris, I bought my 9100 pre from you last june, would that be version 3? Harold May
I would say its probably is if it has a red LED it will be a version 3.0
One place to look is under the pad in the battery compartment. Some of them have a 3.0 marked in there some have it under the Church Audio label. And sadly some are not marked at all. It all depended on how busy I was when they were going under final assembly.
Chris
Hey Chris. A nice mod might be to put a female 'banana' type jack on the case. Connect to postive battery (through a resistor). Then you could measure voltage on the battery from the positive connector to the shield of the miniplug. No opening of package necessary. I think Shure did this with some early versions of their preamps. Useful for measuring both off and loaded voltages of the battery as well. Hey, I might add this to my own preamp eventually.
Richard
That would not work in my case because my input ground is isolated from my output ground and I am also using a split rail power supply. So between + and the virtual ground audio ground. Would only be 4.5 volts. From + to my input ground would be +8volts. Not accurate for measuring the real voltage of my supply.
Chris
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Chris, I bought my 9100 pre from you last june, would that be version 3? Harold May
I would say its probably is if it has a red LED it will be a version 3.0
One place to look is under the pad in the battery compartment. Some of them have a 3.0 marked in there some have it under the Church Audio label. And sadly some are not marked at all. It all depended on how busy I was when they were going under final assembly.
Chris
Hey Chris. A nice mod might be to put a female 'banana' type jack on the case. Connect to postive battery (through a resistor). Then you could measure voltage on the battery from the positive connector to the shield of the miniplug. No opening of package necessary. I think Shure did this with some early versions of their preamps. Useful for measuring both off and loaded voltages of the battery as well. Hey, I might add this to my own preamp eventually.
Richard
That would not work in my case because my input ground is isolated from my output ground and I am also using a split rail power supply. So between + and the virtual ground audio ground. Would only be 4.5 volts. From + to my input ground would be +8volts. Not accurate for measuring the real voltage of my supply.
Chris
Whatever, put two connectors on their if you need to. I'm just saying this might be a nice feature. Or maybe an "option" customers can add-on for a few more dollars...
Richard
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Chris, I bought my 9100 pre from you last june, would that be version 3? Harold May
I would say its probably is if it has a red LED it will be a version 3.0
One place to look is under the pad in the battery compartment. Some of them have a 3.0 marked in there some have it under the Church Audio label. And sadly some are not marked at all. It all depended on how busy I was when they were going under final assembly.
Chris
Hey Chris. A nice mod might be to put a female 'banana' type jack on the case. Connect to postive battery (through a resistor). Then you could measure voltage on the battery from the positive connector to the shield of the miniplug. No opening of package necessary. I think Shure did this with some early versions of their preamps. Useful for measuring both off and loaded voltages of the battery as well. Hey, I might add this to my own preamp eventually.
Richard
That would not work in my case because my input ground is isolated from my output ground and I am also using a split rail power supply. So between + and the virtual ground audio ground. Would only be 4.5 volts. From + to my input ground would be +8volts. Not accurate for measuring the real voltage of my supply.
Chris
Whatever, put two connectors on their if you need to. I'm just saying this might be a nice feature. Or maybe an "option" customers can add-on for a few more dollars...
Richard
You sound pissed off I hope not.. ;)
Anyway I think if someone is to lazy to take a battery out of my preamp and test it.. then nothing I do will help that. I could put in a voltage sensing led... But again everything costs money and everything eats up space inside my little box. :) it was a great suggestion.. I remember the red and black terminals on the back of the shure mixers I never knew what they were for.. Now I do ;)
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Chris, I bought my 9100 pre from you last june, would that be version 3? Harold May
I would say its probably is if it has a red LED it will be a version 3.0
One place to look is under the pad in the battery compartment. Some of them have a 3.0 marked in there some have it under the Church Audio label. And sadly some are not marked at all. It all depended on how busy I was when they were going under final assembly.
Chris
Hey Chris. A nice mod might be to put a female 'banana' type jack on the case. Connect to postive battery (through a resistor). Then you could measure voltage on the battery from the positive connector to the shield of the miniplug. No opening of package necessary. I think Shure did this with some early versions of their preamps. Useful for measuring both off and loaded voltages of the battery as well. Hey, I might add this to my own preamp eventually.
Richard
That would not work in my case because my input ground is isolated from my output ground and I am also using a split rail power supply. So between + and the virtual ground audio ground. Would only be 4.5 volts. From + to my input ground would be +8volts. Not accurate for measuring the real voltage of my supply.
Chris
Whatever, put two connectors on their if you need to. I'm just saying this might be a nice feature. Or maybe an "option" customers can add-on for a few more dollars...
Richard
You sound pissed off I hope not.. ;)
Anyway I think if someone is to lazy to take a battery out of my preamp and test it.. then nothing I do will help that. I could put in a voltage sensing led... But again everything costs money and everything eats up space inside my little box. :) it was a great suggestion.. I remember the red and black terminals on the back of the shure mixers I never knew what they were for.. Now I do ;)
No, not pissed off. I'm just suggesting ideas as they occur to me. Since I'm not selling gear, maybe others can use them. I'm actually trying to avoid using preamp boxes for this very reason - needing to check batteries. Also having extra connectors that fail. Most of the time my low profile rig is some mic (Sennheiser, or chopped AT822) directly into plug in power on Minidisc (for quiet shows, lower self noise), or Edirol R09 (for louder shows). I could probably get better sound with the preamp, but my "organizational abilities" are somewhat limited once I get to the pub!
Richard