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Post by indiehouse on Feb 1, 2018 8:41:17 GMT -6
Just got this in my email from RMS Audioworks. Interesting... Attachments:
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Post by Ward on Feb 1, 2018 8:52:50 GMT -6
Waiting for more info...
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Post by c0rtland on Feb 1, 2018 8:58:05 GMT -6
Just got this in my email from RMS Audioworks. Interesting... they are solid state fet replacements. |
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Post by indiehouse on Feb 1, 2018 9:13:54 GMT -6
Just got this in my email from RMS Audioworks. Interesting... they are solid state fet replacements. Isn't that what Grosser is doing with his VF14? |
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Post by c0rtland on Feb 1, 2018 9:57:22 GMT -6
I haven't heard about that one.
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ericn
Temp
Balance Engineer
Posts: 14,918 
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Post by ericn on Feb 1, 2018 10:16:02 GMT -6
they are solid state fet replacements. Isn't that what Grosser is doing with his VF14? Yes! I wonder if this is the same design that's been floating around for years rebranded? What I have never understood is if these circuits are so good why not just build a mic around it ? Why spend the coin on a tube like package? Does it really need the voltage if it's SS? |
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Post by drbill on Feb 1, 2018 10:16:58 GMT -6
These have been around for awhile. You never hear anything about them though....
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Post by c0rtland on Feb 1, 2018 10:58:16 GMT -6
These have been around for awhile. You never hear anything about them though.... exactly. |
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Post by BenjaminAshlin on Feb 1, 2018 13:12:53 GMT -6
Does anyone know what the price of these is now. When they came out I remember them being close to $1000 which is probably why you don't hear much about them.
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Post by c0rtland on Feb 1, 2018 13:47:15 GMT -6
You can find a real ac701k for less than that.
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Post by EmRR on Feb 1, 2018 13:50:46 GMT -6
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Post by Vincent R. on Feb 1, 2018 14:32:53 GMT -6
I would just email Rob at RMS Audioworks for the full details. He gets back to everyone right away. Rob shot me over the price list. You can see it at the link below: www.phaedrus-audio.com/shop.htm |
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rms
New Member
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Post by rms on Feb 1, 2018 15:13:03 GMT -6
Hello all and thank you first off for your interest. Here are the full details available on the Phaedrus Audio website regarding the FET replacements.
www.phaedrus-audio.com/phaedrus_electron%20tubes.htm
While we have been using these tubes for a little over a year, they are still fairly new to the market. They are not the nearly the same as the Saturn Sound device and they are different from the AG VF14 FET replacement. Both the Phaedrus Audio VF14M and AC701K are FET devices emulating tube characteristics. Both are 100% drop in replacements for original Telefunken VF14 and AC701 tubes. The only variable is if the AC701 is using a cathode follower circuit (Sony CU2 for example), you must use the 6D-H3 version of the AC701K. You can also purchase the standard version of each or upgrade to the RedDot version which comes with a 3 year warranty vs the 1 year, has tighter tolerances in terms of voltage and current draw, and have been selected for low noise. In our testing the standard version has extremely low noise when compared with an original VF14 "M stamped" from Telefunken.
Hope that helps. You can contact us directly for additional questions, or contact sales@phaedrus-audio.com for details. Thank you,
Robert
RMS Audioworks |
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Post by BenjaminAshlin on Feb 1, 2018 15:54:31 GMT -6
I would just email Rob at RMS Audioworks for the full details. He gets back to everyone right away. Rob shot me over the price list. You can see it at the link below: www.phaedrus-audio.com/shop.htm That price is actually pretty reasonable. |
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Post by wiz on Feb 1, 2018 17:44:30 GMT -6
Stupid question number 1.
If you convert the tube, to Fet... is it now similar to the 47fet?
Assuming K47 capsule
cheers
Wiz
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Post by c0rtland on Feb 1, 2018 18:29:07 GMT -6
Stupid question number 1. If you convert the tube, to Fet... is it now similar to the 47fet? Assuming K47 capsule cheers Wiz no. And yes. Technically it won't have a tube like a u47. However, the electronics are different in the fet47 than a u47. And this particular fet is designed to emulate a tube. The fet47 is not trying to emulate a tube circuit. |
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Post by wiz on Feb 1, 2018 18:59:33 GMT -6
Stupid question number 1. If you convert the tube, to Fet... is it now similar to the 47fet? Assuming K47 capsule cheers Wiz no. And yes. Technically it won't have a tube like a u47. However, the electronics are different in the fet47 than a u47. And this particular fet is designed to emulate a tube. The fet47 is not trying to emulate a tube circuit. I was kinda thinking along those lines... anyone heard it? Any files available, comparing tube against the replacement fet? Cheers Wiz |
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Post by wiz on Feb 1, 2018 19:00:06 GMT -6
Its a purely academic interest as I don't own a U47 and probably never will..
HA PROBABLY!!!
8)
cheers
Wiz
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Post by indiehouse on Feb 1, 2018 19:53:33 GMT -6
Grossers Voxorama uses a fet VF14. That mic seems to get good reviews.
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Post by jeremygillespie on Feb 1, 2018 21:34:31 GMT -6
What’s the difference between this and the nuvistor that so many 47’s have been changed over to use?
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ericn
Temp
Balance Engineer
Posts: 14,918
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Post by ericn on Feb 1, 2018 22:06:52 GMT -6
What’s the difference between this and the nuvistor that so many 47’s have been changed over to use? Nuvistor is a Minnie tube this Solid State. |
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Post by paulcheeba on Feb 2, 2018 4:00:18 GMT -6
I bought the Red Dots for my SM69 as an affordable spare. Phaedrus are good guys, I also bought their rack gear which is really versatile. I think they had problems with their original U.S. distributor hiking up prices but the U.K. prices are great. I hope RMS follow in that manner...... It's a good way to save mileage on your VF14M tubes for future investment.
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Post by cowboycoalminer on Feb 2, 2018 13:34:31 GMT -6
Can someone explain to me how in this age of technology and knowledge, a tube can't be built that exceeds or at least matches a tube in performance that was made 75 years ago? Is it the materials that are no longer available or what??
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Post by c0rtland on Feb 2, 2018 13:45:17 GMT -6
Can someone explain to me how in this age of technology and knowledge, a tube can't be built that exceeds or at least matches a tube in performance that was made 75 years ago? Is it the materials that are no longer available or what?? desire/motivation. It's not a can't. It's a won't. |
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Post by johneppstein on Feb 2, 2018 14:01:23 GMT -6
Can someone explain to me how in this age of technology and knowledge, a tube can't be built that exceeds or at least matches a tube in performance that was made 75 years ago? Is it the materials that are no longer available or what?? Come on, man, you know the answer. The machines (for those particular tube types) don't exist anymore and much expertise has been lost, especially trade secrets regarding metallurgy. And then there's the question of environmental regulations which, so I've been told, is what killed tube manufacturing in the US and Western Europe. And then there's the economies of scale. It's a sad but true fact that the market for VF-14 and AC701 tubes in microphones is TINY and there is no other current commercial market for them. It's practical to make all the common tubes used in most other audio gear because those tubes are used in a lot more products. And even so the overall quality is not what it used to be. |
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