Motorola Mitrek area - Lot's of information

Motorola Micor area - Lot's of information (including Spectra-Tac)

Repeater equipment

Other equipment

When performing FM conversions to PM equipment this modulation index chart may be helpful which can be viewed here here

Occasionally, the Author needs to measure receiver sensitivity (20 db quieting method) in a location other than in front of the equipment. Hauling an expensive AC volt meter up the tower is not the first choice. Recently, he found a low-cost self contained sound level meter (SLM) from the vintage days of Radio Shack. It has a built-in battery. It has 10-db step sensitivity which is perfect for this type of measurements. With a simple (temp-prototype) modification a higher impedance input was added across the "cal" pot. This did not affect the other functions of this meter.

For now a set of pins where installed which connects directly to the Micor TAC receiver service module as shown here.

Calibration for this unit was confirmed with a HP 3555 meter. Both meters where clipped in parallel for this task.

A note about the documents; recently they are starting to be converted to PDF for a couple reasons; this solves the issue with html pages (with images) being displayed on various browsers (with other variables) and generally is smaller in file size. This is especially true for a MS-Word document (with images) compared to the size of the same document in PDF. PDFs are easy to download to your PC for later viewing.

Note: Many of these projects are in the R-n-D stage, therefore, are subject to change and improvement without notice. They are intended to get the experienced builder in the right direction and not necessarily for the beginner. Tip: Some are PDF's therefore, to save time you can right click on the link and "save as" to your PC for local (and faster) viewing.