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September 20, 2019, 12:55:09 PM
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News: In order for you to be able to post a new thread in the "For Sale" board, you need at least 10 posts in the rest of the forum, however you'll be able to reply to any topic in the forum even if you dont have the 10 post count. Any posts in the "For Sale" board will not appear in your total post counter.

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+  MCI Console and Tape Machine Forum
|-+  Recent Posts
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 on: August 19, 2019, 07:02:11 PM 
Started by andrekbelo - Last post by MM1100
I have had good success with MAT02 direct improved replacement for the LM394. MAT12 replaces the MAT02 so either should work well. You might be able to find the MAT02 at a lower cost.


Maybe I went overboard on all the parts, but every preamp has the identical Muse recap with bypass caps also. Main goal was to have every channel sound exactly the same. All the channels and eq received the same as well. Originally there was a variety of parts and caps. Plus new opamps.

Old post but heck why not!

 on: August 17, 2019, 07:43:37 PM 
Started by Quint - Last post by Rob
Hello Martin.

I would be interested to see any diagram you have.  I remember reading the description of this mod, but couldn't really get my head round it.

 on: July 25, 2019, 08:03:57 PM 
Started by Quint - Last post by martinlopez310
any help with this? I too am very interested!

I acquired a console with that mod already in place. Initially, I was so confused by the console's routing when I first acquired it due to the in-line features basically missing.  Huh
That was a big reason as to why I became interested in the console in the first place...

I eventually decided to completely retrace all of the mods that were performed to the desk in order to really understand where the issue/non-issue was.

I since reverted a bucket of 8 chan's back by undoing some of the mods in the desk. I might have a schematic I can scan that details the mods

 on: July 25, 2019, 07:53:07 PM 
Started by rennywilson - Last post by martinlopez310
Thank you guys for keeping this place up.  Smiley I am constantly referencing this site; so incredibly helpful.

MCI 416 loaded with 24 channels. Beyer trans, all 2001's. Still happily in love! Cheesy Cheesy Cheesy Cheesy

 on: July 02, 2019, 12:08:22 PM 
Started by rlaury - Last post by Berwyn636
hey I was wanting to do this too but the guy on Ebay was selling the motherboards for like 100 apiece. Would you be willing to part with some of your extra sections of the motherboard?

 on: June 24, 2019, 06:24:25 PM 
Started by rlaury - Last post by rlaury
Found them.  Thanks!

 on: June 22, 2019, 08:51:06 PM 
Started by rlaury - Last post by rlaury
Need used motherboard from ah JH-636 for test fixture. Must have edgecard connectors.

RonL Nashville

 on: May 30, 2019, 01:57:43 PM 
Started by rennywilson - Last post by Berwyn636
I weaved LED tape through all of my VU meters on my console and it worked great! Pulled the old 24V harness out.

 on: April 16, 2019, 03:50:58 PM 
Started by rennywilson - Last post by rennywilson

After more putsin' around, swapping components on a bad record card (bad transistor), I'm now fairly certain that my machine has it's full 16 track compliment!

No, this is not the JH13, or 14 im used to  Tongue

Which is amazing considering this old thing (which came out of a storage shed in the southwest with a fair degree of oxidization) has never been fully operational, today would be its first time under my ownership, that's over 5 years folks.

When you can't afford to pay a real tech for a house call, are too chicken to do it yourself, and too busy recording projects all the time just to cover the studio overhead, hence the life-journey subject line... sheesh!

To electronic confidence and competence, soon I'm gonna redo the lights on this thing and I'll post a pic!

Speaking of which, has anyone put modern low voltage LED's into their JH tape machine (or console vu's for that matter)? I was thinking of skipping out on getting the 24v incandescents which aren't the cheapest in favor of something cheaper, brighter, and that will last longer - what's the smartest way to do this?


 on: April 06, 2019, 05:07:03 PM 
Started by rennywilson - Last post by rennywilson
Onto track 16, which will not latch. Looking at the schem it would seem that P7 is my issue, as I can get the relay on ch 16 to latch if P7 is swapped between a working channel, ruling out the strip board. My bus board voltages also seem very consistent throughout.

 It's not the molex either, where exactly does the other end of this molex lead? the remote? Vus?

I just wanna give a belated thank you to harrison for contributing your knowledge, without a whisp of a response for such a long time (I was on tour so much of last year I didn't have a chance to even think about these repairs!)

Another useful tidbit, the remote led for 16 will illuminate while rec is held, however it is extremely dim by comparison.

Back at it...


I seem to have found the issue here also, I traced it to the Rec light itself on the remote itself not quite completing its path. It's dimly lit nature was a clue to success!

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