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14th June 2008
| #1 |
| Gear interested Join Date: Nov 2007
Posts: 15
Thread Starter | Microphone Find - B&O BM-3 and Sony C-57 Hello All, I just bought some microphones at a garage sale and haven't been able to find much about them, nor their value. I found 3 B&O Dynaco - BM3 or BM4 - I don't know how to tell the difference. They book look alike in photos online. Also - a pair of Sony C-57s. Any advice on value, where to find good information including value, parts, and such would be greatly appreciated! |
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14th June 2008
| #2 |
| Lives for gear  Join Date: Feb 2006 Location: Woodstock, NY
Posts: 1,425
| I love those Sonys...... great mics. A bit noisy, but they sound good. Valued at maybe $2000 for the pair..... not really sure. I bought mine at a steal..
__________________ ------- D. James Goodwin www.djamesgoodwin.com **religion kills** **Freedom, morality, and the human dignity of the individual consists precisely in this; that he does good not because he is forced to do so, but because he freely conceives it, wants it, and loves it.** - Mikhail Bakunin |
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14th June 2008
| #3 |
| Gear interested Join Date: Nov 2007
Posts: 15
Thread Starter | I think I got a great deal on these. I bought all 5 mics for $500 at a garage sale. I just don't have any experience with any of these mics so I am hoping the gurus here can point me in the right direction. |
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14th June 2008
| #4 |
| 500 series nutjob  Join Date: Nov 2004 Location: 500 series Guru SKANK! ; )
Posts: 10,749
| the B&Os sound great after a new ribbon, and reversing the polarity. but they have low output. great score!!!!!
__________________ www.pan60.com BLAST PAD Inventor just one invention among others.  A CHARTER MEMBER OF THE 500 FORMAT, MAFIA Never EVER let the quality of your tools dictate what you do and don't get done, that's irresponsible and disrespectful to yourself as well as the muse. Gregory Scott - ubk it is easy to sound as though one was endowed with great intelligence, whilst speaking amongst a crowd of total morons  |
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14th June 2008
| #5 |
| Gear interested Join Date: Nov 2007
Posts: 15
Thread Starter | Any recommendations on a tech to "repair" them? |
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14th June 2008
| #6 | |||
| Lives for gear  Join Date: Dec 2002 Location: France
Posts: 1,023
| Quote:
That is when their ribbon is oxydised ( as, I agree, they are prone to) , wich is not always the case Quote:
Please ... Quote:
malice | |||
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14th June 2008
| #7 |
| Gear interested Join Date: Nov 2007
Posts: 15
Thread Starter | I love the discussion - I opened up one and the ribbon is silver, doesn't look like any oxidation has happened. I have one with green lettering (says Fontone) and two with red lettering (don't say fontone) - any difference? |
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14th June 2008
| #8 |
| 500 series nutjob Join Date: Nov 2004 Location: 500 series Guru SKANK! ; )
Posts: 10,749
| Fontone or Fentone? check your PM |
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14th June 2008
| #9 | ||||||
| 500 series nutjob Join Date: Nov 2004 Location: 500 series Guru SKANK! ; )
Posts: 10,749
| Quote:
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the improvement was very very significant. Quote:
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they are out of polarity to the current norm. you could check and see, possibly already changed but i would doubt it, all i have seen were pin three positive. Quote:
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but i have not seen them all and i am no authority on ribbons. | ||||||
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14th June 2008
| #10 |
| Gear interested Join Date: Nov 2007
Posts: 15
Thread Starter | Fentone - sorry I can't read. Also - I don't see any PMs to me. |
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14th June 2008
| #11 |
| Lives for gear  Join Date: Dec 2007 Location: South Georgia
Posts: 2,919
 | Nice find! I have a BM-3 myself, it's awesome. Get Stephen Sank to re-ribbon if you need to. It does have really low output, still, with the new ribbons. I also have the BM-5, a stereo version, with the original ribbons intact. Talk about low-output... |
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14th June 2008
| #12 |
| Lives for gear Join Date: Dec 2007 Location: South Georgia
Posts: 2,919
| Oh yeah, value. How is the chrome on the BM-3s? I bought mine for about $400 and the chrome is in terrible condition! This was from Pro Audio Heaven! Vintage Ribbon Microphones, RCA, Shure, Neumann, Neve, B&O and more... - Home . So you got quite a deal. If you don't like them I'm sure you could sell them. On ebay I saw BM-3s with old ribbons (or untested) going for at least $300 a pop. If it's a new ribbon the value didn't go up, I guess maybe people are not "informed" about what this means. |
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14th June 2008
| #13 |
| Gear interested Join Date: Nov 2007
Posts: 15
Thread Starter | the chrome's in great condition in my opinion. I have attached a few pictures. Anyone know anything about the Sony C-57s? |
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14th June 2008
| #14 |
| Lives for gear Join Date: Dec 2007 Location: South Georgia
Posts: 2,919
| I guess attachments are still broken... |
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14th June 2008
| #15 |
| Gear interested Join Date: Nov 2007
Posts: 15
Thread Starter | how about the links below? I just threw them up on my site. http://forgefocus.com/images/IMG_2593.JPG http://forgefocus.com/images/IMG_2594.JPG http://forgefocus.com/images/IMG_2595.JPG |
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14th June 2008
| #16 | |
| 500 series nutjob Join Date: Nov 2004 Location: 500 series Guru SKANK! ; )
Posts: 10,749
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14th June 2008
| #17 |
| Lives for gear Join Date: Dec 2007 Location: South Georgia
Posts: 2,919
| Oh well now they show up, must have been some lag. Anyway, they do look very nice, much better than mine, but mine is awful. But oh boy does it sound good, especially on guitar or trumpet. Man oh man I don't suppose you'd be interested in passing your good find on a fellow gearslut  I'd love to get one of those BM-3s to make a set... |
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14th June 2008
| #18 | |
| 500 series nutjob Join Date: Nov 2004 Location: 500 series Guru SKANK! ; )
Posts: 10,749
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14th June 2008
| #19 |
| Gear nut Join Date: May 2005
Posts: 145
| The plating and engraving of the B&Os are quite nice. The transformer is very small and the magnets are not terribly strong, so you have to be realistic in your expectations . Here is a picture of the insides of a perfect one. Latest News from Crowley and Tripp's Lab: Duralumin in ribbon microphones Note that the original ribbon is made of a type of high strength alloy. Over time it would stiffen and lower the output. Some people also say that alloy is prone to corrosion at the clamps. These mics have a sharp cutoff due to the parallel sides of the motor unit, and the surrounding ribs. I have a couple of them in the museum and people love the phallic rocketship look. |
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14th June 2008
| #20 |
| 500 series nutjob Join Date: Nov 2004 Location: 500 series Guru SKANK! ; )
Posts: 10,749
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14th June 2008
| #21 |
| Lives for gear  Join Date: May 2006 Location: (visiting) Lake Elsinor
Posts: 7,874
| http://microphonium.blogspot.com/2007/04/duralumin-in-ribbon-microphones.html it all comes from the ground its actually a pretty important subject for better advancement of materials glad to see someone in the mic industry trying to push forward
__________________  matt H.think ... it will help with the stupid problems. boom boom is not Rhythm spinny mic tecnology |
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18th June 2008
| #22 |
| Gear interested Join Date: Nov 2007
Posts: 15
Thread Starter | It seems like the wiring of the BM3 is non-standard vs. normal XLR. It appears that the ground and white are switched. Does anyone have experience with this? Also, are their shockmounts available? Thanks! Chris |
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18th June 2008
| #23 | ||
| 500 series nutjob Join Date: Nov 2004 Location: 500 series Guru SKANK! ; )
Posts: 10,749
| Quote:
other older mics will be wired backwards as well. Quote:
as well i have made many adaptor so the B&O can be mounted in a standard shock mount. their could be some offered, but their would have to be a fair amount of interest, for me to do so. | ||
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19th June 2008
| #24 |
| Lives for gear Join Date: Dec 2007 Location: South Georgia
Posts: 2,919
| I've used the Sabra-som system to great success with my BM-3. Not the absolute best fit but it works well enough. |
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19th June 2008
| #25 |
| Gear interested Join Date: Nov 2007
Posts: 15
Thread Starter | Has anyone used Sony C-57s? What was your experience and thoughts about them? Problems or highlights? |
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20th June 2008
| #26 | |
| Lives for gear  Join Date: Jun 2002 Location: I left my heart, in...
Posts: 1,863
| Quote:
My lord. I knew someone in high school who was in a car accident and had to wear one of those....
__________________ -David R. "An intellectual says a simple thing in a hard way. An artist says a hard thing in a simple way." - C. Bukowski | |
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20th June 2008
| #27 | |
| 500 series nutjob Join Date: Nov 2004 Location: 500 series Guru SKANK! ; )
Posts: 10,749
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20th June 2008
| #28 |
| Gear interested Join Date: Oct 2004 Location: Ames, Iowa
Posts: 21
| c57 Sony C-57 Manufactures Information The links on the above page are wrong... Sony C-57 Tube Mic It appears to use the same power supply as the C37A... the audio transformer is located in the power supply. The following link the power supply drawing from my webpage... c37apg9 Rgds: Eric home |
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21st June 2008
| #29 |
| Gear interested Join Date: Nov 2007
Posts: 15
Thread Starter | Thanks for the image. I actually have the original manuals for the C-57s. I just can't find anyone who has actually used one. Just curious. |
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21st June 2008
| #30 |
| Gear interested Join Date: Oct 2004 Location: Ames, Iowa
Posts: 21
| The design looks suspiciously similar to the C37A... does it use the mechanical shutter switched by a screw on the back of the capsule to change the directional pattern like the C37A? Do they have the polar plots and frequency response in the manual? How does it compare to the ones for a C37A? C-37A Weber Music Rgds: Eric |
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