Com-Spec is also the source of the Selectone line of products.

Note:   Com-Spec will sell direct to the end user and can easily beat Hutton's, Tessco's and most others prices.
Call 800-854-0547 or 714-998-3021 from 8:00am to 4:30pm (Pacific time zone), Monday to Friday

If you have any data sheets that are not included below, please let us know!
We can have them scanned and then return them to you.
This page compiled by Mike Morris WA6ILQ.
Maintained by Robert Meister WA1MIK.

In the land mobile (e.g. commercial 2-way) world, there are (or were) three different companies that used the initials CSI.   The most famous is Communications Specialists, listed above, and whose products are on this page.   Then there is Connect Systems Incorporated, which made repeater tone panels for the commercial market and and autopatch equipment for the amateur market. They are located in Ventura, in Southern California (their previous address, still on the title pages of some of the downloadable manuals, was in Torrance, California) and they have their own web page at this web site.   The third CSI company was Communications Systems Incorporated company in Lynnwood, in Washington state, which is long out of business.   That "CSI" made, among other things, the CSI-32 and CSI Super-32 repeater tone panels that are a blue-gray color. Copies of the manuals are on the "Other Manufacturers" page at this web site.   If anyone has copies of other manuals we'd appreciate a chance to scan them.
The three CSI companies are not (and were not) linked in any way
(except in the minds of a few clueless customers).

Click here to jump down to the Selectone products

Com-Spec Data Sheets

Many of the Com-Spec encoder products had a low output impedance which can load down other circuitry when connected. This is not a design fault of the Com-Spec product. Depending on the application it may be necesary to add a series restor between the encoder and the destination circuitry. The value of the resistor will range from 1 K to 47 K depending on the application.

	Com-Spec 2003 catalog   1.13 MB PDF   courtesy of A. Nony Mous
	DCS-23 Instruction Sheet / Schematic   364 KB PDF   courtesy of A. Nony Mous This is a universal DCS encoder decoder. Think "TS-32" for Digtal Coded Squelch (DCS). The more common name is Digital PL (DPL), a Motorola trade mark or DCG, a GE trademark.
	HP-1A Instruction Sheet / Schematic   200 KB PDF   This is a discontinued product. It was a stand-alone high pass audio filter board similar to the one contained in the TS-32 or TS-64 and is easily duplicatable on perfboard.
	HP-1B Instruction Sheet   108 KB PDF   This is a discontinued product and consisted of the HP-1A packaged as a hybrid chip (that was manufactured by Murata for Com-Spec), and it is no longer available.
	ID-8 Instruction Sheet / Schematic   364 KB PDF   courtesy of A. Nony Mous This is a generic IDer board that can be added to almost any repeating radio. See the article on the Micor page.
	ME-3 Instruction Sheet / Schematic   64 kB PDF   courtesy of Skipp This was an encode only subminiature encoder that used plug-in ceramic resonators that had two pins on the bottom an an ink-stamped tone code on the top. The PC board had a range jumper - if the unit does not produce the correct tone you need to check for the absence or presence of the jumper. There was also a ME-12 version of this that was in a plastic box with a rotary switch on the front and 12 tone element sockets inside.
	ME-3 Instruction Sheet / Schematic   180 KB PDF file   courtesy of Bob WA1MIK Larger, clearer, original scanned page, converted to PDF.
	RB-1 Instruction Sheet / Schematic   86 KB GIF file (courtesy of Eric Lemmon WB6FLY) The RB-1 adds reverse-burst to ME3s, TS-32s and other encoders. To change the duration of the reverse burst adjust the value of C3 or R13. Here's the same file as a 95 KB PDF (courtesy of Eric Lemmon WB6FLY) This is a discontinued product but it's easy to duplicate on perfboard. Also, this circuit will work in any system that uses a reed-based decoder and also with some electronic decoders. It may not function with some newer radios because some manufacturers use 120 degrees phase shift for reverse burst instead of the 180 degrees that this unit provides.   If anybody wants to modify it for a 120 degree shift let us know and we'll add the info here.
	SS-32 Instruction Sheet / Schematic   Encode only     IC-107 version
	SS-32P Instruction Sheet / Schematic   216 KB PDF   Encode only   IC-110 version
	SS-32SMP Instruction Sheet / Schematic   149 KB PDF   Encode only, very small (surface mount version of the SS-32P)
	SS-64 Instruction Sheet / Schematic   288 KB PDF   Encode only, with optional reverse burst
	TP-38 community repeat panel documentation:       This was the predecessor to the TP-3200. The basic unit does not do digital squelch / DCS / DPL / DCG and in the beginning the sales literature said it could not be added. Later on a kit was developed that added it. The TP-38 is a handy unit that decodes any combinations of CTCSS tones and can allow your repeater to decode multiple tones. Just program it for zero hang time, then connect it to the repeater controller as if it was an external CTCSS decoder (which it is). Programming sheets (oriented sideways for printing):   page 1   page 2   page 3 TP-38 Short-Form Programming Info   5 KB PDF TP-38 Manual   944 KB PDF TP-38 Reset Info   3.2 KB PDF TP-38D Schematic   108 KB PDF TP-38 DCS Supplement   6 page, 416 KB PDF DCS (also known as DPL or DCG) was not included in the basic design and was implemented as an add-on board that was available as an option or could be field installed. TP-38 to Kenwood TKR-820 Repeater hookup   86 KB PDF
	The TP-3200 community repeat panel was the follow-on to the TP-38. Here's all the documentation we've been able to find: This unit does all 51 PL/CG/CTCSS codes and 106 DPL/DCS codes While this is a terrific unit do not plan on using the internal IDer in amateur radio repeaters. The ID code speed is fixed at 25 WPM and can not be slowed down. It is, however a very useful unit that will allow your repeater to respond to any combination of CTCSS tones or CDCSS codes on the input. TP-3200 Manual   7.4 MB PDF courtesy of Com-Spec. This is a 24 page PDF, the first two are the product brochure. Then is the main manual, including schematics, system parameters, level adjustments, over-the-air DTMF programming information, PC board layouts, and more. TP-3200 Instructions   A 31 KB PDF with 99% of the above info. TP-3200 Schematic   55 KB PDF courtesy of Com Spec. TP-3200 Password Reset Procedure   How to gain access to the unit when you are locked out.   49 KB PDF courtesy of Com-Spec. Connecting a TP-3200 to a Micor repeater station   99 KB PDF file Connecting a TP-3200 to a MSR2000 repeater station   39 KB PDF file
	TE-64 Instruction Sheet     211 KB PDF courtesy of N7FM     Photo   Photo by A. Nony Mous This is a scan of the sheet that was packed with the unit, somewhat cleaned up with a graphic editor. It contains the schematic, tone chart, programming, etc. Supposedly there was a second page.
	TS-32 Instruction Sheet   This is the full 6-page 1.9 MB PDF data package containing the schematic, parts list, programming instructions, power connections, receiver connections (audio muting), high pass filter connections, multi-tone information, troubleshooting, etc.   IC-107 version Note that the hangup pin must be grounded or it won't decode. This is the single most common installation error...
	The TS32 electronics spawned several other products including several boxed products that used a rotary switch to select the tone. Some just had the switch, some also had a two-digit digital display. Here's a photo of a non-display unit.
	TS-32HB Instruction Sheet / Schematic   4 pages, 262 KB PDF.   Encode / Decode   courtesy of Eric Lemmon WB6FLY
	TS-32P Instruction Sheet / Schematic   1 page, 50 KB PDF.   Encode / Decode     IC-110 version
	TS-64 Instruction Sheet   288 KB PDF   This is the full data package containing the schematic, tone chart, programming, etc. Additional information on the TS-64 can be found here, courtesy of Mike Morris WA6ILQ. Note that the hangup lead (the violet wire) must be grounded or the decode output (the white wire) won't show any indication. This is the single most common installation error...
	TS-64WDS Instruction Sheet   1.02 MB PDF file   Courtesy of Com-Spec This is a new variant on the TS-64 that has some differences that make it attractive for repeater stations... One is that they have added an audio gate function.

Modifications