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Multiplexer allows AllStar Link and D-Star, DMR
or other digital voice to share one repeater

For Two-Way Radio Applications

Model MUX-25

Ordering instructions on bottom of page.

The MUX-25 is an affordable, professional multiplexer for use in amateur repeater systems.

  This device allows one repeater to be alternately connected to D-Star, DMR (some form of digital voice) or AllStar Link (analog).  

The current product is all thru-hole to allow assembly and repair by the common technician.

Surface mounted capacitors were replaced with standard non-polarized Electrolytic with board revision 5 [REV5].

Designed by Ramesh Dhami - VA3UV and Jon Rorke - VA3RQ

Price $25.00 each - in kit form.
Assembled and tested - $45.00 each.

Free 3D Case & Lid Files
Provided by Jeremy B.


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First-Class shipping available to most locations worldwide, calculated at checkout.
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Actual Size MUX-25 Top photo.
(Click image to enlarge)

Description:
The MUX-25 board was produced from a three-part schematic supplied by two Canadian hams - VA3UV and VA3RQ. It's intended to connect one analog and one digital radio interface (DVM) to one repeater - making it multi-mode. The radio connector is designed for a Kenwood TKR-750/850 repeater, but will easily adapt to most any repeater as the signals are generic in nature. The analog side is a AllStar node and the digital side is D-STAR or DMR using your favorite application and support hardware. The board has a few refinements and additions over the original schematic supplied as BMP images. The additions are two LEDs for PTT status of analog and digital, and ability to source the audio amplifiers of RA boards from the 12V that powers this board.

The MUX-25 is available as a complete kit including all of the parts listed in the parts list.
Starting with REV5, the kit has NO surface mounted components.
The MUX-25 is also available completely assembled, for an additional fee.

PDF schematic  A PDF of the original schematic BMP images.

Connector pinout  Pinout of the radio ports (Female DB9s) and repeater/controller port (Female DB25).

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MUX-25 Ordering Options:


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Email Kevin Custer for ordering information, order by check, and/or quantity pricing of this exciting product.
 

Product of Masters Communications, all rights reserved.
Specifications may change without notice.
Designed by VA3UV and VA3RQ.
Images are property of Kevin Custer - Masters Communications
Board layout by Kevin Custer - W3KKC.
HTML February 14, 2016 W3KKC All Rights Reserved!