What does "MI" stand for on old RCA gear?

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What does "MI" stand for on old RCA gear?

Postby Trakworx Mastering » Fri Feb 18, 2011 2:15 pm

It appears that all of the old RCA mics, pre's and rack gear have an "MI" number. For example the RCA KU-3A mic is also MI-10001. Does anyone know what "MI" stands for?
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Re: What does "MI" stand for on old RCA gear?

Postby Arny » Sun Feb 20, 2011 3:47 am

Trakworx Mastering wrote:It appears that all of the old RCA mics, pre's and rack gear have an "MI" number. For example the RCA KU-3A mic is also MI-10001. Does anyone know what "MI" stands for?


Dear Trakworx,
I have a 44 & a 77 and was always told it meant "Manufactures Instructions", which had something to do with how the mic was delivered, Colour, Cable, Stand Holder, etc etc.

Best Regards

Tony.
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Re: What does "MI" stand for on old RCA gear?

Postby Trakworx Mastering » Wed Feb 23, 2011 1:42 pm

Thanks! In asking around I have heard "Manufacturing Instructions" and "Master Index", both from what I consider to be reliable sources. Not that it's terribly important, but I wonder which it is...

Here - http://www.coutant.org/rca70d/index.html it says Master Index

and here - http://www.silviaclassics.com/resources/ it says Manufacturing Instructions...

J~
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Re: What does "MI" stand for on old RCA gear?

Postby Arny » Wed Feb 23, 2011 2:10 pm

Trakworx Mastering wrote:Thanks! In asking around I have heard "Manufacturing Instructions" and "Master Index", both from what I consider to be reliable sources. Not that it's terribly important, but I wonder which it is...

Here - http://www.coutant.org/rca70d/index.html it says Master Index

and here - http://www.silviaclassics.com/resources/ it says Manufacturing Instructions...

J~

Dear Trakworx,
No I did not have to ask arround I have had most of my Mics from new being 75 years old, and I remember when I dropped the 77
the Mic worked fine, but it had a dent in the Grill, I was asked by the British Importer for the S/No, so I read him the serial # , he replied NO, they wanted number begining with MI, as this told them the colour of the Mic and the many other things about the 77, the engineer then informed me what I already knew, that the Grill was the crome version.

As the M1 motorway was just being built in England near that time, I jokingly asked did the MI have anything to do with this other number, the Engineer without any sense of humour quickly informed me that it meant Manufactures Instructions.
hope this post gives you peace of mind, and you sleep well at night from now on.

Best Regards

Tony
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Re: What does "MI" stand for on old RCA gear?

Postby Arny » Wed Feb 23, 2011 2:27 pm

Its great to spend a little of my time writing a post as opposed to deleting spam, which my idea may have worked I hope, allthough I do find it strange that I send PM's about this problem but fail to receive a reply.
So lets all kick-start this great site of Forums back into GO GO GO. ImageImage

I am now manufacturing Foam Lined Mic Boxes with a coloured fabric liner, these pictures are without the Foam Liners, as Danny, kindly arranged the shipping of the Foam Sculpturing tools which should arrive the early part of next week.
Image
I can not believe how one can spend so much money on Mics , yet they arrive in plastic bags, many years ago all my mics, apart from the two RCA's came in neat wooden boxes.
My Sony mics arrived in nice wooden boxes, so if they can do it why can't the famous European Mic manuafactures do the same, I have just ordered some Beyer 160's for a friend and I can't believe that a $450 dollar mic arrives in a plastic bag, I suppose its what competition does and why I only drive classic cars.

Best Regards

Tony.
http://www.helios-electronics.com
http://www.ampex-uk.com
http://www.arnys-shack.com
http://www.cafe-au-go-go.com

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Re: What does "MI" stand for on old RCA gear?

Postby THEMIXFIX » Thu Feb 24, 2011 7:25 pm

Arny:

Sorry to go off topic, but I want to make sure you get this.

We are still working on things. I sent you several PMs,did you receive them? I haven't received any PM from anyone, but that may be a part of the hack, or the way we set the parameters totry and minimize the spam/hackers.

Sturgis has updated the software. We are doing some other things, but I don't want to revel them and make it any easier for the hackers.

I did PM you saying that you were very astute to in your recommendation, but that's all I'll say about it, again, to keep the security level as high as possible. I did get a few emails from people who want to register, but told them to please be patient, since I got about 6,000 from bots asking permission to register, too, until I turned off that option.

So, I hope, as we slowly and methodically work things out, everyone can please continue to be patient, and regular members will continue to post.

If you are a registered member and you can't log on, which has happened to both Sturgis and I, please email me and let me know. You can't email through this site yet, and I don't want to give out my email address, so if you know a member who has it, please communicate privatley through emailing directly to another registered member who's email address you kknow, and who knows my email or Sturgis'.

I feel like the CIA doing things this way, but, hey, even they get hacked, so I understand!!

Thanks again for your patience and understanding.
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Re: What does "MI" stand for on old RCA gear?

Postby dbbubba » Fri Feb 25, 2011 11:31 am

So THAT is what the foam cutting equipment is for!

I know that you explained it all in the conversation we had earlier last month (January) but my brain didn't make the "leap" between the wooden boxes and the foam lining required.

Hey, Bob... great job on everyone's part as far as trying to eliminate the spam.
It seems to be working. (fingers crossed!)
Danny Brown
(I was going call myself Mr. B because I like people to say "MISTER" when they say my name, but then I pitied the fools.)
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Re: What does "MI" stand for on old RCA gear?

Postby dbbubba » Tue Jul 05, 2011 9:49 pm

Hey... and update and answer to the original question of this thread.
According to Larry Miller (an Ampex design team member of the AG-350, AG-440 and everything else up to the ATR series)
M.I. in RCA speak means MASTER INDEX.
Here is what he said, "In RCA-land, "MI" meant Master Item. RCA had a big set of loose-leaf binders that had everything they ever built, and each thing, no matter how big or small, important or trivial, had a Master Item (MI) number."

I pointed him ARF and he noticed this and emailed me.
Danny Brown
(I was going call myself Mr. B because I like people to say "MISTER" when they say my name, but then I pitied the fools.)
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Re: What does "MI" stand for on old RCA gear?

Postby Arny » Wed Jul 06, 2011 2:46 pm

Dear Danny,
He also thought that the AG440 had DC outboard motors, we all know they are 117V AC.
I now would like to see this document to be convinced.

Sorry Danny.

Best Regards

Tony
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