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Gear / Technical Help => Microphones & Setup => Topic started by: xjsb125 on January 28, 2017, 11:41:06 PM
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Quick question on using the AT853's>AT8538 phantom adapters>Tascam DR 70D: What voltage do I need to set the DR 70 to for phantom power? I've never used phantom power, or adapters for that matter, and I want to make sure I don't fry the mics the first time I use them.
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I believe 48p and the adapters step the voltage down for the mics.
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It works anywhere in a range of 11-52 volts
(http://salestores.com/stores/images/images_747/AT8538.jpg)
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The mics run great at 48 volts phantom power.
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The mics run great at 48 volts phantom power.
:facepalm:
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I don't see any benefit in supplying 48v phantom since the adaptor is going to knock it the hell down. I would think that the 24v setting should be fine?
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I don't see any benefit in supplying 48v phantom since the adaptor is going to knock it the hell down. I would think that the 24v setting should be fine?
I've run my 853s through a Naiant PFA at 24v, 48v doesn't seem necessary since the PFA brings the voltage down to 8v for PIP.
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I don't see any benefit in supplying 48v phantom since the adaptor is going to knock it the hell down. I would think that the 24v setting should be fine?
I've run my 853s through a Naiant PFA at 24v, 48v doesn't seem necessary since the PFA brings the voltage down to 8v for PIP.
Which is exactly what the AT8538 will do.....
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I might be trying this soon for the first time with the exact same gear. I've only ran the AT853s with the 4.7k mod adapter and had great results running > STC-9200(+15db) > DR-2D(LineIn). I'm wondering if I ran 853s > AT8538s > DR-70D, would I need to run line or mic in, and would I need to set the gain on low or medium? Also - would the quality be comparable to just using the 4.7k mod with the mics into the line in? I'm curious as to what the benefit is to using the 8538s.
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I might be trying this soon for the first time with the exact same gear. I've only ran the AT853s with the 4.7k mod adapter and had great results running > STC-9200(+15db) > DR-2D(LineIn). I'm wondering if I ran 853s > AT8538s > DR-70D, would I need to run line or mic in, and would I need to set the gain on low or medium? Also - would the quality be comparable to just using the 4.7k mod with the mics into the line in? I'm curious as to what the benefit is to using the 8538s.
Mic in. The power adaptors let you power the mics with phantom power rather than the separate power modules. The gain would depend on how loud the source is
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I think the resistor mod allows you to get by using a recorder's built in plug in power with the AT853s if the source isn't too loud.
I also think the adjustable phantom power settings on the 70d are there to allow the user to more closely match the power output to the mic power requirements so you can extend the 70d battery life.
What that means in terms of where the OP should run his mics using the phantom power adapters I don't know.
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I've had consistently better results using the phantom power adapters. Really depends on how loud the source material is. For bluegrass and acoustic stuff the 4.7K 1/8" to "mic in" has been fine. But I tried that about 12 rows back at Tedeshci Truck Band and the recording distorted.
I've never had distortion in any situation while using the phantom power adapters. I agree that 24V is sufficient to run those.
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I've used my Sound Devices MP2 with those AT XLR Phantom Adapters - the MP2 has switchable phantom power of either 15V or 48V.
I've always powered the ATs at 15V Phantom, never had a problem.
(the AT adapters, as noted above, kick the voltage down - I thought to 9V, looks like 8V).
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As long as we're on AT power adaptors / modules........
I usually run the AT8531 power modules with my AT853's with good success. As expected, because that's what comes with them. I always powered with an "A battery"; just figured out today that you can also leave the battery out and run phantom with these things.
I also have several AT8505 "Unipoint power supply" units. When I got these, I assumed they worked the same way. I can't find any info at all on the units. Does anyone know anything about them? They also accept a 1.5v "A" battery. I've tried all 4 of them with the battery; no dice. All I can figure is:
1. These don't work with the AT853's because of a different pin config.
2. Have to be powered by phantom (then why do they need a battery?)
3. All four units are faulty (I'm thinking not likely)
Anyone have any insight, experience, spec sheet, wild ass guess or any other info?
Also trying to figure out if there are any major differences between the AT853 and the U853R. (such as the pin config). I'm thinking same basic mic, new name?
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Hey lsd2525, it's been a bit since you posted abut this, but did you ever figure out the at8505 power modules? I just got a couple and tried them with u853 mics and didn't get any signal aside from popping when I changed the switch position (while using phantom power). I have other AT power modules I can compare pin voltage against but thought I'd see if you had the easy answer first. Thanks.
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Hey lsd2525, it's been a bit since you posted abut this, but did you ever figure out the at8505 power modules? I just got a couple and tried them with u853 mics and didn't get any signal aside from popping when I changed the switch position (while using phantom power). I have other AT power modules I can compare pin voltage against but thought I'd see if you had the easy answer first. Thanks.
No, I pretty much threw them in a box and forgot about them. I should probably pull them out and have another go
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I am also hoping for some more details on the AT8505.
Saturday, I bought a pair of AT853s on ebay and they come with a pair of AT8505s. The price was remarkable and I had to pull the trigger. I noticed that the connectors off the mics are probably mini XLR. Those power supplies look huge though, just too big really.
Wondering:
1. Can I ditch the AT8505s for a set of AT8531s? Anyone familiar with this method? They are the original AT853 model.
2. Can I use AT8538s instead?
Fingers crossed they are subcard caps. Wouldn't care if they were cards though, the set was $55.
With mini XLR they would be a great choice to do a 4.7k mod.
I figure it was a win in some category yet to be seen pending arrival.
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I am also hoping for some more details on the AT8505.
Saturday, I bought a pair of AT853s on ebay and they come with a pair of AT8505s. The price was remarkable and I had to pull the trigger. I noticed that the connectors off the mics are probably mini XLR. Those power supplies look huge though, just too big really.
Wondering:
1. Can I ditch the AT8505s for a set of AT8531s? Anyone familiar with this method? They are the original AT853 model.
2. Can I use AT8538s instead?
Fingers crossed they are subcard caps. Wouldn't care if they were cards though, the set was $55.
I use the AT8531 all the time. All you need is a 2x female XLR>1/8 cable. And yes, if unmolested the connectors off the mics is mini XLR
With mini XLR they would be a great choice to do a 4.7k mod.
I figure it was a win in some category yet to be seen pending arrival.
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Thanks for the info.
I figured as much.
Those AT8505s look a lot bigger than their replacement AT8538s.
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Another question on the AT853.
If I buy a set with standard XLR connections, can those be modified for the 4.7k mod?
My assumption would be "yes" based on the mini-XLR termination's allowance for modification.
Thanks for any info.
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Another question on the AT853.
If I buy a set with standard XLR connections, can those be modified for the 4.7k mod?
My assumption would be "yes" based on the mini-XLR termination's allowance for modification.
Thanks for any info.
You only need the mod if you are running 2-wire (wired to a 3.5mm plug). Yes, the XLRs can be modded if you want, but a lot of people suggest getting a 2xFXLR > M Stereo 3.5mm adapter and wiring the mod into the adapter. That way you have both setups.