A U.S. Manufacturer of Repeater and Interoperability Controllers and Accessories

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Yaesu DR-2X and the S-COM 7330

At S-COM, we've had several inquiries about the recently released Yaesu DR-2X and how it works with the S-COM 7330.  We have a DR-2X here on the workbench that has the same rework that Yaesu has offered to all DR-2X owners. 

Bob's Blog #6: Cabinets

So why are we dedicating a blog to a boring topic like cabinets? Are they made of Valyrian steel?

Nope, aluminum. But we hope you’ll find the details interesting anyway.

Our repeater controller cabinets are made of 5052-H32 aluminum alloy sheet. It’s strong, light, formable, and commonly used for aircraft, marine, and commercial-grade parts.

7330 Firmware and Tools Release 1.7 Is Available!

Release 1.7 of the 7330 Firmware and Tools is now available! Our testers have finished their testing and all feedback has been incorporated into the firmware and documentation.

There are two new major features in this release:

-- new Runtime Variables (RTVs) have been added so that your messages can speak the current values of booleans, software switches, counters, timers, analog inputs, logic inputs and logic outputs.

Bob's Blog #5: Macros

Macro commands have been implemented in every S-COM controller since 1976. Why?

The term dates from mid-1950s computing. It was common for a programmer to enter a short macro instruction to generate a series of other instructions. It saved time, reduced errors, and helped standardize the code.

Bob's Blog #4: The S-COM Programming Language

So where did it come from, anyway?

Not surprisingly, early repeater control systems weren’t very sophisticated by today’s standards. Oldsters will recall one-tube COR circuits, CW identifiers that used code wheels and tape decks, and controllers made from relays and pneumatic timers. Some repeaters could be shut down by dialing an unlisted telephone number.

Bob's Blog #3: 7330 Internal Power Supply

The 7330’s internal power supply is compatible with both standard and alternative energy sources. Here’s how it works.

The 7330’s circuitry requires four voltages: +5 V, +3.3 V, +2.5 V, and +1.2 V. A type of DC/DC converter called a buck regulator reduces the external supply voltage to +5 V; linear regulators further reduce +5 V to the other voltages.

7330 GUI Programming Utility

Sigrid Company LLC is pleased to announce version 1.0 of P7330, our new GUI programming utility for the S-COM 7330 repeater controller.

P7330 includes these advanced features and more:

    • Message Builder - Create a messages without looking up controller codes.
    • Macro Editor - Create & manage macros with automatic creation codes and password insertion.
    • Macro Pick List - Shows currently defined macros. Drag & Drop a macro from the list to any macro field.

Bob's Blog #2: 7330 Internal Audio Levels

In Appendix B (Installation), the 7330 User Manual recommends adjusting the three receive audio pots for 1 V peak-to-peak as measured by an oscilloscope at test points TP9 (RX1), TP10 (RX2), and TP11 (RX3).

That specific level is maintained throughout the controller’s audio section. This blog explains why it was chosen.

Bob's Blog #1: 7330 Digitally Stored Speech

Years ago, the S-COM 7K and similar controllers used voice synthesizers to create speech for talking clocks, talking calendars, announcements, and so on. Users could not add their own words to the vocabulary due to the specialized hardware and software involved, so we contracted with a language lab to offer a word creation service. EPROMs were programmed with word files from the lab and shipped to customers for installation in their 7K SSMs (Speech Synthesizer Modules).

7330 Controller Training Slideset Updated

Today I taught a Repeater Controller training class in the Denver area.  In preparation for the class, I updated the slideset that has been posted on the web site since the last time I taught the class in 2014.

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