If you don't see what you are looking for, don't forget to check Mike Blenderman's extensive Spectra site here.

Spectra articles and files here at Repeater-Builder:

You should read this Motorola Spectra Introductory Information article before any of the other articles here in this section. It has an introduction to the Motorola Spectra radios, with background, history, some model-specific information, photos, and other miscellaneous information.

Spectra Sales Brochure An original Motorola catalog sheet with abbreviated specifications. 674kB PDF.

Spectra Motorcycle Spec Sheet An original Motorola spec sheet with photos and abbreviated specifications. 189kB PDF.

Spectra Conventional Radio System Operator's Manual   Motorola manual part number 6881071C55. 4.1MB PDF.

Spectra Privacy-Plus Radio System Operator's Manual   Motorola manual part number 6880102W88-B. 2.3MB PDF.

Spectra SmartNet Radio System Operator's Manual   Motorola manual part number 6880102W89-C. 4.1MB PDF.

Spectra Parts Catalog 1MB PDF, and another version Spectra Parts Catalog 240kB PDF.

Info on the new Moto railroad locomotive cab radio based on the Astro Spectra. 140kB PDF.

Spectra Clean-Cab Railroad Radio Operator's Manual   Motorola manual part number 6802902A81-B. 780kB PDF.

DEK schematic 614kB PDF.

Hand-Held Control Head Single and Dual Radio Instruction Manual Introductory information only for Option W845ASSP (dual radio) and Option W845AUSP (single radio) with HHCH, SIU, security boxes, etc. Scanned by WA1MIK. Goes with the dual radio article below. 2.8MB PDF.

Spectra Dual Radio Configuration Procedure By Josh Wallace KD5QCZ. Goes with the HHCH PDF file above.

One approach to adding a COR Signal to the Spectra DB-15 Accessory Connector By Nick Markovich N2XFX

Spectra Control Head Ignition Jumper Information by Robert W. Meister WA1MIK

Why a 900 MHz Spectra Won't Receive at 902 MHz and What You Can't Do About It by Robert W. Meister WA1MIK

Interfacing External Equipment to the Spectra Mobile Radio by Robert W. Meister WA1MIK

Recapping the Spectra Mobile (a.k.a. the Time-Bomb Capacitors) by Robert W. Meister WA1MIK

Recapping the Systems 9000 Control Head by Mark Tomany N9WYS

A great article on Recapping/Refurbishing the Spectra Mobile (off-site link) by David Rudd AI4JI

Build Your Own Spectra Low-power and Medium-power Programming Cable by Robert W. Meister WA1MIK

Build a Spectra Low-power and Medium-power DC Power Cable with Ignition Control by Robert W. Meister WA1MIK

How to Hex Edit the Spectra RSS to Enable 900 MHz Amateur Frequencies by Robert W. Meister WA1MIK

Spectra 900 MHz VCO Modification by Robert W. Meister WA1MIK

Spectra UHF VCO Modification off-site article by VK3KBC
A simple VCO mod (like the one above) that helps a range-1 (403-433 MHz) radio operate in the 440 MHz range

Adding a Preamp to a UHF Spectra Radio by Robert W. Meister WA1MIK

Miscellaneous Spectra Topics by Robert W. Meister WA1MIK

The Spectra Desktop Station by (who else) Robert W. Meister WA1MIK

Spectra Dash-mount Control Head Interconnect Boards by (yet again) Robert W. Meister WA1MIK

Intro to Spectra Radio Configurations by (yup, you guessed it) Robert W. Meister WA1MIK

Setting Up and Using Multiple Coded Squelch (MPL) by (tired of being a lonely author) Robert W. Meister WA1MIK

Spectra Error Codes by (finally running out of things to write about) Robert W. Meister WA1MIK

An Extension Cable for Repairing Dash-mount Control Heads by (managed to dig up something else) Robert W. Meister WA1MIK

Spectra Hacks (Bitbanging) by James S. Vooght K2JSV

Some notes on Replacing the Spectra MLM by Alex Cobleigh K6LPG

A Comparison of Old and New Spectra Circuit Boards by (found something interesting) Robert W. Meister WA1MIK

A List of Spectra Module (Board) Numbers by (discovered another useful topic) Robert W. Meister WA1MIK

Spectra Command Board Jumpers: Location and function by (I was really bored) Robert W. Meister WA1MIK

Identifying Spectra Frequency Ranges / Splits by Mike Morris WA6ILQ     

Astro Digital Spectra Service Manual, part 1 of 4. Chapters 1-6. 2.5 MB PDF file.

Astro Digital Spectra Service Manual, part 2 of 4. Chapter 7 pages 1-25. 3.7 MB PDF file.

Astro Digital Spectra Service Manual, part 3 of 4. Chapter 7, pages 26-48. 8.1 MB PDF file.

Astro Digital Spectra Service Manual, part 4 of 4. Chapter 7, pages 49-134 and appendices. 8.4 MB PDF file.

Astro Digital Spectra Service Manual, the whole thing in one file. 23 MB PDF file.

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