Home |
Search |
Today's Posts |
#1
Posted to rec.audio.pro
|
|||
|
|||
can anyone identify this mic?
hello, i have an old tube condenser mic that has no markings on it
whatsoever, and have been trying to find out who made it via google image search, with no luck. it has two rca 230 tubes in it, and i do not have the power supply or any other accessories. here's a couple pics: http://farm2.static.flickr.com/1059/...bdd858c9_o.jpg http://farm2.static.flickr.com/1422/...d7d7cba8_o.jpg thanks in advance for any help on this! pea hicks |
#2
Posted to rec.audio.pro
|
|||
|
|||
can anyone identify this mic?
On Sep 22, 8:38 pm, Pea Hicks wrote:
hello, i have an old tube condenser mic that has no markings on it whatsoever, and have been trying to find out who made it via google image search, with no luck. it has two rca 230 tubes in it, and i do not have the power supply or any other accessories. here's a couple pics: http://farm2.static.flickr.com/1059/...bdd858c9_o.jpg http://farm2.static.flickr.com/1422/...d7d7cba8_o.jpg thanks in advance for any help on this! pea hicks This isn't exactly it, but it's in the ballpark - http://www.coutant.org/we47/index.html |
#3
Posted to rec.audio.pro
|
|||
|
|||
can anyone identify this mic?
Pea Hicks wrote:
hello, i have an old tube condenser mic that has no markings on it whatsoever, and have been trying to find out who made it via google image search, with no luck. it has two rca 230 tubes in it, and i do not have the power supply or any other accessories. here's a couple pics: http://farm2.static.flickr.com/1059/...bdd858c9_o.jpg http://farm2.static.flickr.com/1422/...d7d7cba8_o.jpg thanks in advance for any help on this! Looks to me like a homebrew job... definitely looks to be hand-machined, and it's definitely got some sort of omni capsule. Looking at the capsule will probably tell you more. A lot of this sort of homebrew stuff was built in Hollywood. There are no "RCA 230" tubes. RCA used standard RETMA numbers for consumer stuff and four-digit numbers for industrial stuff, and looking in the big HB-3 book I don't see any industrial numbers that either begin or end with 230. Is it possible this is a Western Electric tube number? My 1933 Western Electric book doesn't have a 230 in it, but it does have a 231D. If it's a Western Electric type, it's a good clue to the origin of the mike since WE tubes were not freely available at the local grocery store like RCA stuff was. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#4
Posted to rec.audio.pro
|
|||
|
|||
can anyone identify this mic?
Scott Dorsey wrote: Looks to me like a homebrew job... definitely looks to be hand-machined, and it's definitely got some sort of omni capsule. Looking at the capsule will probably tell you more. A lot of this sort of homebrew stuff was built in Hollywood. There are no "RCA 230" tubes. RCA used standard RETMA numbers for consumer stuff and four-digit numbers for industrial stuff, and looking in the big HB-3 book I don't see any industrial numbers that either begin or end with 230. Is it possible this is a Western Electric tube number? My 1933 Western Electric book doesn't have a 230 in it, but it does have a 231D. If it's a Western Electric type, it's a good clue to the origin of the mike since WE tubes were not freely available at the local grocery store like RCA stuff was. --scott hi scott, sorry for accidently responding to your email address. i'm copying my response to the ng. this mic came from the estate of a man who worked for bell & howell and also was a sales rep for western electric sound systems. so maybe it's a proto of some sort? not really homebrew, but a one-off nonetheless? i took a pic of the base of one of the tubes: http://farm2.static.flickr.com/1252/...df0a915e_o.jpg thoughts? pea |
#5
Posted to rec.audio.pro
|
|||
|
|||
can anyone identify this mic?
Pea Hicks wrote:
this mic came from the estate of a man who worked for bell & howell and also was a sales rep for western electric sound systems. so maybe it's a proto of some sort? not really homebrew, but a one-off nonetheless? Could well be. Or could be a G-job made for personal use. i took a pic of the base of one of the tubes: http://farm2.static.flickr.com/1252/...df0a915e_o.jpg thoughts? Bingo! That's a British number! Note the British logo on the base! http://www.6v6.co.uk/archive/rca_radiotron/rc10-35.gif That's a page from the 1929 Radiotron manual. Note that this is a super high capacitance tube, compared with a modern 12AX7, so it very much dates the microphone to the early to mid 1930s. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#6
Posted to rec.audio.pro
|
|||
|
|||
can anyone identify this mic?
On Tue, 25 Sep 2007 09:48:43 -0400, Scott Dorsey wrote
(in article ): Pea Hicks wrote: this mic came from the estate of a man who worked for bell & howell and also was a sales rep for western electric sound systems. so maybe it's a proto of some sort? not really homebrew, but a one-off nonetheless? Could well be. Or could be a G-job made for personal use. i took a pic of the base of one of the tubes: http://farm2.static.flickr.com/1252/...df0a915e_o.jpg thoughts? Bingo! That's a British number! Note the British logo on the base! http://www.6v6.co.uk/archive/rca_radiotron/rc10-35.gif That's a page from the 1929 Radiotron manual. Note that this is a super high capacitance tube, compared with a modern 12AX7, so it very much dates the microphone to the early to mid 1930s. --scott I love it when you talk like that! Regards, Ty Ford --Audio Equipment Reviews Audio Production Services Acting and Voiceover Demos http://www.tyford.com Guitar player?:http://www.youtube.com/watch?v=4RZJ9MptZmU |
#7
Posted to rec.audio.pro
|
|||
|
|||
can anyone identify this mic?
Scott Dorsey wrote: Bingo! That's a British number! Note the British logo on the base! http://www.6v6.co.uk/archive/rca_radiotron/rc10-35.gif That's a page from the 1929 Radiotron manual. Note that this is a super high capacitance tube, compared with a modern 12AX7, so it very much dates the microphone to the early to mid 1930s. --scott cool! although these tubes aren't globe style tubes like the one pictured in the catalog scan you linked to... anyway, i was thinking that was about the right date for this mic... thanks for the info! pea |
#8
Posted to rec.audio.pro
|
|||
|
|||
can anyone identify this mic?
Pea Hicks wrote:
Scott Dorsey wrote: Bingo! That's a British number! Note the British logo on the base! http://www.6v6.co.uk/archive/rca_radiotron/rc10-35.gif That's a page from the 1929 Radiotron manual. Note that this is a super high capacitance tube, compared with a modern 12AX7, so it very much dates the microphone to the early to mid 1930s. cool! although these tubes aren't globe style tubes like the one pictured in the catalog scan you linked to... anyway, i was thinking that was about the right date for this mic... Check the pinout and see. The grid should go to the capsule, the plate goes to a high value resistor to the B+, the cathode goes to a low value resistor to ground, and the filament leads go straight to the filament supply. If the pinout matches, you've probably got the right tube. If it doesn't, you certainly don't. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
Reply |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Help identify tube amp | Vacuum Tubes | |||
Please identify these pcb materials | Audio Opinions | |||
Please identify these pcb materials | Tech | |||
CAN ANYONE IDENTIFY THIS MIC | Pro Audio | |||
Help Identify this RF sub... | Car Audio |