Tape Project Forum

Tape Machines => Reel to Reel Tape Machines => Topic started by: VonFon on October 17, 2009, 08:51:26 AM

Title: MX-5050 QXHD Homemade Remote Control - Possible?
Post by: VonFon on October 17, 2009, 08:51:26 AM

The schematic seemingly shows the use of SPDT switches. Tracing out their logic shows that SPST switches should perform the same function. Is there something I am missing? Are the switches mechanically interlocked? Are they "make-before-break" or some such configuration?

I want to connect the remote to the main deck using RJ-45 plugs and connectors. Any problem with the voltage / current demands thru this tiny wire?

Any idea on the proper lamp / LED for the record lamp?

Any advise would be great. I can always count on this group!

BTW: I tried to attach some Photobucket links but I failed. Rats.

Title: Re: MX-5050 QXHD Homemade Remote Control - Possible?
Post by: VonFon on December 11, 2009, 08:02:43 PM

REPLY TO MY OWN POST:
In case anyone is interested. The switches can be SPST. There is no mechanical interlock - DUH! Logic controlled; and done very nicely by Otari.
The choice of RJ-45 was not an option - I needed a minimum of 12 wires to provide the remote functions needed.

The LED retrofit was easy. I pulled all the incandescents and replaced then with off-the-shelf LED's. The only tricky part was the current limiting resistor installation. If anyone is interested I will provide the photos of the procedure.

The remote control was not so easy.

Step 1: I used large "video game" type switches for all the functions. The switches selected allowed the installation of back-lit graphics of the control functions. I had originally labeled these switches "STOP, PLAY", etc. Poor choice. A much better choice will be arrow graphics and industry standard for tape motion functions. Will upgrade next time I print labels.

Step 2: Otari only provided for one indicator light - RECORD.

I felt that all functions should be indicated by illumination. A quick check of the schematics will reveal that all the functions can easily be indicated by pilot lights except the function "STOP"

Title: Re: MX-5050 QXHD Homemade Remote Control - Possible?
Post by: progdrums on March 06, 2010, 01:15:36 AM

Hey Chris. I am interested in the LED conversion. My main problem is I bought a mx5050BII and the dummy plug for the remote is missing. I found a site that says to short pins 1-3-8; 4-6.This is not correct as my machine still does not function.
Can you help please?