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| Re: The different V76 models [message #41905 is a reply to message #41250 ] |
Thu, 27 January 2005 19:37   |
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 Oliver Archut
Messages: 618
Registered: April 2004 |
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Beggining of 1954 the IRT and Maihak made several units(about 50 or so), that were just labeled V76, but had all the 80 low and 3kHz high cut.
The historic TAB company started in 1956 with the production of the V76 version as mentioned above, adding the V76 with 120Hz cut in 1960, since than there is the 80 or 120 extension on the designation number.
The 80 unit was aimed for the radio market, the 120 for TV studios.
Both units are the same with the difference in the filter choke that set the cut off frequency.
Also in 1960 the "S" version was introduced, "S" stand original for "Schallplatte" or for Vinyl Disk, indicating "Studio use" and in 1965 official changed to "Studio".
The "S" version is quite different, multiple switchable low cut, and also multiple switchable high cut. Filter inductor are made from NI/FE alloy for better sound performance than the standard ferrite cores in the 80/120 units.
The input x-former, even barring the same part number, it is similar to the standard version, but hooked up in a different way, also a bit differently wound. There are also a few minor changes in layout, wiring, etc.
The "M" version was released as a reference amplifier or better measuring amp indicated by the "M" the german word is "Messverstaerker". Technical speaking and entire different amplifier, output and tubes are the same, input and front amp are different as can be. Input x-former is 10kOhm impedance, and max. gain is 60 dB. About 600 units were made.
In 1968 the "MT" was released the "M" version as technology/laboratory amp, with a frequency response 5 to 50k Hz. a bit different than the M version in circuit tree, and 66dB of gain. Less than 100 were made...
Nearly at the end the "FR" version was designed for better console layout only used in 24 plus channel consoles with remote controllable gain. The standard 80/120 chassis without the filters...
There are a few custom version made over the years, and it is worth mention that there is an EMI made V76S with a few different options, x-former are the same than the TAB made "S" version...
Hope that helps....
Oliver Archut
www.tab-funkenwerk.com
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| Re: The different V76 models [message #219011 is a reply to message #41250 ] |
Tue, 06 February 2007 11:15 |
iCombs
Messages: 391
Registered: March 2006
Location: Minneapollis |
Active Member |
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It'd probably sound like an SM-5 or SM-7. I know that the SM-5 is based around the same Unidyne III capsule as the SM57. If you poke around, you'll be able to find directions for pulling the transformer from a 57.
I would also be interested to know what transformers you'd reccomend, Oliver.
Ian Combs
Producer/Engineer
Lightspeed Group, Inc.
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"Mista apareeatah... can I have maar beass at all frequencies?"
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I'm utterly baffled at the general opinion regarding smoking. I don't smoke, but it's a bar, for God's sake. That's what your supposed to expect. It's a den of iniquity where people are going to indulge in all of the minor vices and sins denied to them during their mundane workdays. You can wreck your liver, ruin your hearing, get into a fight, and pick up an STD, but somehow smoking is unacceptable? Sheesh. We've turned into a nation of entitled whiners.
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| Re: The different V76 models [message #221207 is a reply to message #41250 ] |
Tue, 13 February 2007 10:32 |
iCombs
Messages: 391
Registered: March 2006
Location: Minneapollis |
Active Member |
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could you suggest an existing transformer that would work well (or at least better) in an SM-57?
Ian Combs
Producer/Engineer
Lightspeed Group, Inc.
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"Mista apareeatah... can I have maar beass at all frequencies?"
----------------------
I'm utterly baffled at the general opinion regarding smoking. I don't smoke, but it's a bar, for God's sake. That's what your supposed to expect. It's a den of iniquity where people are going to indulge in all of the minor vices and sins denied to them during their mundane workdays. You can wreck your liver, ruin your hearing, get into a fight, and pick up an STD, but somehow smoking is unacceptable? Sheesh. We've turned into a nation of entitled whiners.
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| Re: The different V76 models [message #221465 is a reply to message #41250 ] |
Tue, 13 February 2007 23:52 |
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Oliver Archut
Messages: 618
Registered: April 2004 |
Gold Member |
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The SM57 is quite difficult to match to a transformer and to my knowledge there is no after market x-former currently available that will compliment the capsule of the mic.
Due to the low impedance a step-up transformer is needed, just taking a similar ratio will just pass sound, does it sounds good or improves the stock version? That is hard to say.
Placing a larger core x-former in a box, is not an solution at all, and direct no x-former is in my opinion questionable.
A direct coupled x-former with an electronic circuit that is phantom powered might be a solution...
Best regards,
Oliver Archut
www.tab-funkenwerk.com
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