Back to Home   Technical Information on S‑COM Repeater Controllers    

Compiled and HTML'd by Mike Morris WA6ILQ
Web page maintained by Kevin Custer W3KKC and by Mike Morris WA6ILQ

Click here or on the logo above to go to the S-COM factory website

Note that the S-Com factory still supports all of the 5K, 6K, 7K and 7330 controllers, including spare parts stock to the limit of parts availability.


Contact:   S-COM, LLC   Contact Bob Schmid directly at bob (at) scomcontrollers (dot) com
For reference, the prior address (seen in many old manuals) was Box 1718 in Loveland, Colorado.
PO Box 1546
LaPorte, Colorado, USA 80535-1546
Voice: (970) 416-6505
Fax: (970) 419-3222
E-mail: sales (at) scomcontrollers (dot) com

The S-Com corporate web site has a wealth of information at http://www.scomcontrollers.com.

There are two Scom mailing lists:
    Click here for the main list (all Scom products).
    Click here for the 7330 list.
There is a large user community on the mailing lists, plus the principals are active members of the list.

The 2.04x version of the firmware for the 7K was developed by Dave Karr KA9FUR at Vyex (from the S-Com 7K 2.03x firmware) to fully integrate his new Digital Audio board with the 7K controller. A number of very useful features were added at the same time (like an IF-THEN-ELSE construct). Support for all 2.04x issues is provided by Vyex, with contact information on their web page.

Scom has produced four controllers over the last 30 years:

The programming language is very similar between models. Each model built on the architecture of the prior model.
Support for all four models is still available and is limited only by the availability of parts.

The Vyex Digital Audio Board   - a replacement for the S-Com 7K speech synthesizer board... Bring your 7K up to date!   (offsite link)
The SCOM Digital Audio Delay Board - DADM   - Masters Communications OEM identical DADM
S-Com Connector pinout  Covers the models 5K, 6K, 7K and 7330
Various Technical Notes on S-Com products   by Mike Morris WA6ILQ
Including some notes on serial communications with the 7330 or the 7K DAB.
Sample programming for the S-Com repeater controller line   By Joel Huntley WA1ZYX   (Off-site link, opens in a new browser tab)
Programmers would call these "code fragments" - just little tricks and treats that others have developed and decided to share.
S-COM 7K to MICOR station interfacing   (19 kB PDF file)   By Bob Hoffman N3CVL.
This file was recreated from old postscript files. Diagrams only; no text.
Another connection of a repeater controller (an S-COM 7K) to the MICOR Unified Chassis Station   By Joel Huntley WA1ZYX   (Off-site link, opens in a new browser tab)
Also applies to the 5K or 6k with connector pin number changes.
Interfacing a GE MASTR II Base Station / Repeater to a S-Com 5K or 7K   (19 kB PDF file)   By Bob Schmid WA9FBO of S-Com, LLC.
Also applies to the 5K or 6k with connector pin number changes.
Interfacing a Uniden Repeater to an S-Com 5K   (108 kB PDF file)
Also applies to the 5K or 6k with connector pin number changes.
Interfacing an MSF5000 Repeater to an S-Com 7330   (372 kB PDF file)   By Justin Reed NØUJQ
Interfacing a Kenwood TKR-720 or TKR-820 repeater to an S-Com 5K   By John "Jake" Eckardt N3FU
Just change the pin numbers for the 6K or 7K
Recovering the extra User Function Outputs from an S-COM 7K     By Andy Zorca WJ9J
Eight additonal digital outputs are available from a 7K controller. Here's a schematic of the hardware to do it, along with a complete description of the programming.
Configuring the S-Com 6K to Operate a Link Transceiver   A thorough step-by-step walkthrough, including programming, by Justin Reed NØUJQ
The technique also applies to the 7k with connector pin number changes.
Programming your S-Com 5K, 6K or 7K repeater controller without a radio or a phone line   By Mike Morris WA6ILQ
The pre-7330 S-Com controllers do not have a serial port (unless your 7K has a DAB).   Here's how to get around that.
This technique works with any brand of controller that understands DTMF.
Analog Audio Delay Module Schematic (ADM)  This is the early analog delay module. Most had two of the pots sealed with glyptal - Don't mess with the sealed pots! This is the voice of experience...
Digital Audio Delay Module Schematic (DADM)   This is the later digital delay module.   Switch setting info is here: http://www.scomcontrollers.com/node/26.
S-Com 7330 Board Layout   This is worth printing on a color printer and putting inside the case of the controller.
One trick that has been done to confuse folks that want to play with your system is to use a courtesy tone that is commonly used by another brand of controller. The ACC page at this web site has a PDF that describes the factory shipped courtesy beeps. They are included in the courtesy tones collection page (trust me - the "Nextel Beep" is cute, but becomes real annoying after a while).

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This web page created 02-Apr-2007.

Information and images published with cooperation and permission of S-COM LLC, All Rights Reserved.


is a Registered Trademark ® of Kevin Custer.
The use of this logo image is individually licensed to S-COM LLC and JHK Labs for SCOM & S-COM branded products.

This web page, this web site, the information presented in and on its pages and in these modifications and conversions is © Copyrighted 1995 and (date of last update) by Kevin Custer W3KKC and multiple originating authors. All Rights Reserved, including that of paper and web publication elsewhere.