Group Buy Interest?

  • Thread starter Thread starter chance
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Sorry for the double post but for those that got their mics in the last buy, I am looking for another room mic for drums. Could someone suggest what they think would be best for that application? I guess I would also like one to record amps and maybe a vocal that is not suited for the mics I have or needs a different sound for a track. I don't own a ribbon but have been dying to try one. Thanks alot.
 
chance said:
Hasn't even started yet.

I just E-mailed someone pics of the new tube ribbon and they should post soon
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What are the advantages/disadvantages of a "tube ribbon" vs. a normal ribbon. Why not a FET ribbon (or is there one)?
 
I am on the road now but I E-mail'd photos and specs of the new TnC tube ribbon mic. I sent it to 2 people here on HR to post. I was able to post on PSW (whatever works) topic "HERE WE GO AGAIN". Hopefully they will post the info here soon. I can't post the info (on the road and files are at the studio)
 
TUBE_RIBBON.jpg

side_1.JPG

over_view.JPG



ACM-RT1 SPECIFICATIONS
● Type: Tube Ribbon Microphone
● Polar Pattern: 8 Figure
● Frequency Response: 30～15000Hz
● Sensitivity: -34dB
● Rated Impedance: 200ohm
● Maximum SPL: 128dB for 1% T.H.D.
● Equivalent Noise Level: 18dB (A weight IEC 651)
 
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Thanks Chance and RightOn. Any possibility of seeing the inside of that?
 
crazydoc said:
Thanks Chance and RightOn. Any possibility of seeing the inside of that?
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Not yet,, but soon. I don't have a claim to this design (my mistake) but remember, you saw it here first and yes it will be an "ACM" (Another Cheap Mic) LOL
 
Tube Ribbon
TUBE%20RIBBON.jpg


over%20view.JPG


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The specs are posted above.

EDIT: Phooey, seems the IMG code doesn't work on here. Meh, I am late to the party anyway.
 
chance said:
Not yet,, but soon. I don't have a claim to this design (my mistake) but remember, you saw it here first and yes it will be an "ACM" (Another Cheap Mic) LOL
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so this is your design too chance-- like the acm310?
 
mshilarious said:
You would select a tube vs. a FET for the same reason you would in a condenser mic;
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And what are those reasons? I asked about this in the big mic thread and Harvey talked about it a bit, but is there any rule of thumb sonically between tubes, FET, transformerless, etc? This stuff is all a bit over my head, so I try to muddle through. What do the cheapies like the Studio Projects use on the output if it isn't a FET or a transformer?

https://homerecording.com/bbs/showpost.php?p=2101207&postcount=875
 
RightOnMusic said:
ACM-RT1 SPECIFICATIONS
● Type: Tube Ribbon Microphone
● Polar Pattern: 8 Figure
● Frequency Response: 30～15000Hz
● Sensitivity: -34dB
● Rated Impedance: 200ohm
● Maximum SPL: 128dB for 1% T.H.D.
● Equivalent Noise Level: 18dB (A weight IEC 651)
Click to expand...

Thanks for the quick edit
 
bubbagump said:
And what are those reasons? I asked about this in the big mic thread and Harvey talked about it a bit, but is there any rule of thumb sonically between tubes, FET, transformerless, etc? This stuff is all a bit over my head, so I try to muddle through. What do the cheapies like the Studio Projects use on the output if it isn't a FET or a transformer?
Click to expand...

OK first you have to differentiate the capsule buffer from the output stage. First let's talk about condensers. The capsule has GOT to be buffered by a FET or tube, no other choice there. Obviously a FET is much cheaper, they cost about $0.05 in large quantities, and they are happy with phantom power so you don't need an external power supply.

Next is the output stage. Typically the FET buffer is followed by a BJT pair which drives the output. The other choice is a transformer. It's the same for a tube, it still needs an output driver.

That's the cheapest configuration and is used in the overwhelming majority of cheap condensers. Tubes are expensive, power supplies are expensive, and especially decent transformers are expensive.

For a ribbon mic, it is questionable to me whether an active stage helps. The transformer is still mandatory, because the output from the ribbon motor is so low that if you hook it straight to a FET, noise will be a problem. But if you have it hooked up to a transformer, then the transformer can already drive the output, it's just that the level is still kinda low. But from my point of view, it's much easier to deal with gain in the preamp when you have all the power you need, and plenty of room for components. Using an active stage in a ribbon also converts it into a microphone that requires phantom power, which is usually not a problem, but should be considered.

The thread on Prodigy Pro was discussing overwinding the transformer secondary. That will increase the signal level with little added noise, but raise the impedance beyond what you'd want to drive a mic preamp. Hence the discussion that followed to create a buffer for the high-impedance transformer. They did eventually add gain to the circuit (it is tempting!), but that is not the primary purpose of the circuit.

Again, if you have a regular ribbon, I think you're probably better off working on a better preamp rather than an active stage inside the ribbon. The preamp will make all your mics sound better.

I have an old Shure 315 with a switchable impedance transformer, so someday I might try the active ribbon circuit and see if I like it. Actually I'd like to do my tube circuit, but there is very little room inside that mic.
 
Hey Chance did you get my email? and how do you think the mic you just posted would work for a room mic for drums? What do you think it's best applications are? Thanks.
 
bodaddy said:
Hey Chance did you get my email? and how do you think the mic you just posted would work for a room mic for drums? What do you think it's best applications are? Thanks.
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No. I'm on the road doing a "remote". I just got the prototype and haven't taken it around the track yet except for the usual "check 1, 2, 3 " test to make sure it passes signal. I worked with the engineers in China exchanging ideas on this one. Before it goes up on the next GB, I'll post my impressions of this mic.
 
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