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Technical Information on
Compiled by Mike Morris WA6ILQ
Web page maintained by Robert Meister WA1MIK
I know nothing about this equipment so please don't ask!
Click on the image above or here to go to the Midland web site, then click on "LMR"
To jump down to the Midland Amateur Radio products click here
Midland Commercial Equipment
There is a YahooGroup email list for almost every brand of radio, and sometimes, as in Kenwood, there are model-specific groups. Midland is no different. Click here to go to the Midland LMR email list.
One rule of thumb: The Syntech I radios use EPROM Modules and a hardware programmer, while both the Syntech II and XTR radios program with a PC, like modern radios.
|Midland 70-1308A Programmer - Here's the schematic of a Syntech II and XTR programmer courtesy of Brett Kitchens KF4SQB|
Does anyone have any information on the Midland Programming Interface 70-1052A ?
It is used to program the 70-045 / 70-065 / 70-165 / 70-265 / 70-166 / 70-266 series portables.
Or of the 70-1080 Programmer ?
|Midland base, repeater and mobile model table courtesy of Bill Janes, N9SII|
|Midland portable model table courtesy of Michael James KC5JDG|
|Midland 70-201BD radio is a relabeled Maxon SD-125 UHF.|
Midland 70-0351A/B/C and 70-0355A/B/C 60W VHF-LO
mobile transceiver 3.0 MB PDF file
Actual manual number 70-351355 dated 7/91
Midland 70-1336A / 1336B 15/30W VHF-HI mobile
transceiver 2.7 MB PDF file
Actual manual number 70-133600 dated 4/91
Midland 70-1340A/B and 70-1440A/B 2-40W VHF-HI
mobile transceiver 4.7 MB PDF file
Actual manual number 70-134144 dated 12/94
Midland 70-2914 CTCSS / CDCSS Encoder for the Syn-Tech
II 70-3400AD/BD and 70-5300AD/BD 2.1 MB PDF file
This kit also adds a timeout timer, carrier delay timer, courtesy beep and high-pass audio filter to prevent retransmittion of the incoming CTCSS tone or CDCSS digital code. The actual board number is 70-07519.
Actual manual number 70-999936 dated 9/92
Midland 70-3400 and 70-3800 Syn-Tech II
40-watt and 110-watt VHF High band radio service manual 11.7 MB PDF file
Actual manual number 70-340380, date unknown. This is part 3 of a 3-manual set. If anyone has the first two parts we'd be glad to have them.
and 70-5300AD/BD Syn-Tech II Duplex Mobile / Base
Station / Repeater for VHF High band or UHF band 4.9 MB PDF file
Actual manual number 70-340530 dated 1/93
Midland 70-530A/B/C/D/E and
70-653A/B/C/D/E Syn-Tech UHF Mobile radio Service Manual 3.9 MB PDF file
Actual manual number 70-406512 dated 3/83
The Midland Base-Tech series (possibly the entire product line) is made in Japan by Hitachi. These are crystal-controlled stations. Jeff AL1Q donated this two-manual set for the 50 and 100 watt UHF base/repeater stations, which cover the UHF band in two splits. The manuals were scanned, cleaned up, and stitched together by Bob WA1MIK. The first part had color X-ray views; the second part was obviously a reprint and the X-ray views were already in gray-scale. Both parts were scanned in gray-scale.
Midland Base-Tech UHF Service Manual
part 1 6.5 MB PDF file
This contains the operating and installation information plus service information for the non-frequency dependent equipment which is common to the entire Base-Tech line, such as the control circuitry, power supply, and cabinet. 10/88 revision.
Midland Base-Tech UHF Service Manual
part 2 25.4 MB PDF file
This contains specifications, troubleshooting procedures, technical data, and drawings for the transmitter, receiver, and RF power amplifiers of the 71-4050 (50 watt UHF) and 71-4120 (120 watt UHF) stations. 7/94 revision.
The Midland / Icom relationship:
The Midland 70-154A and B handheld are clones of the Icom H16 (16 channel highband, front panel programmable) and are identical except for the color of the plastic and the name on the housing. The 70-254A and B are clones of the U16, the UHF version. The programming instructions for the H16 and U16 that are on the Icom page at this web site will work for the Midland clones.
Midland Amateur Radio Equipment
Since Midland is out of the amateur radio market, and no longer offers any amateur radio equipment manuals for sale, if someone can PDF the service manuals for these older radios it would be appreciated. The models that we do not have include the 13-500 (2m crystal) mobile and all of the amateur handhelds.
All of the amateur market Midland radios were carrier squelch only, but they had a multi-pin accessory connector on the rear of the radio, and the signals available included switched +12vDC on transmit, transmitter audio in and PTT in. Some folks used the connector for powering DTMF encoders, some for CTCSS encoders, some (like me) for both. The most common CTCSS encoder used was by Communications Specialists, commonly known as Com-Spec, and they have their own page at this web site. I used a model with a rotary switch).
|The Midland 13-500 was a twelve crystal controlled channel, 10 watts or 1 watt mobile. No manual on file; anybody want to loan theirs for scanning?|
Midland 13-509 users manual 5.1 MB
PDF file donated by Ray Wolfe K9RI
front panel photo
This radio is a 220 MHz version of the 13-500, and also was marketed as the Clegg FM-76 and Cobra Model 200. This PDF file is the manual that was shipped with the radio. The schematic is inside the back cover. They were made with three different colors of front panel: black, tan and chocolate brown (shown in the front panel photo above).
Midland 13-509 service
manual 1.7 MB PDF file donated by Eric Lemmon WB6FLY
Yes, this file is smaller than the owner's manual, but that is due to a better scan and better compression. This is the manual that was sold by Midland as a service manual... for two dollars plus postage.
|Notes on a repeater based on the Midland 13-509 1.9 MB PDF file by Chuck Adams WB5WRR|
Midland radio Conversions
for links and repeaters by Karl Shoemaker AK2O of the Spokane Repeater
Group (http://www.srgclub.org) (offsite link)
While this web page is oriented to the 13-509 220 MHz radio much of the information is applicable to the 13-500 2m radio as well. The theory and comments are well worth reading.
Improved squelch action for the 13-500 or 13-509
Donated by Bob Dengler NO6B
A simple modification (two caps and 1 resistor) that results in much better squelch action on these radios.
5 watt low power setting for 13-509 and its
variants Donated by Larry Clore WB9F
A simple modification for making the low power setting 5 watts for link duty on the 13-509 and its variants.
|Midland 13-510 Owner's / Service manual 2m, 1w / 10w / 30 watt synthesized. 6.6 MB PDF file|
|Midland 13-513 Owner's Manual (220 MHz version of the 13-510) 3.9 MB PDF file|
|Midland 13-513 Service Manual 3.2 MB PDF file|
Midland Consumer Equipment
The Midland Weather radio model WR-300 (and probably other WR series receivers) is not suitable for use as a source of the weather "Watch", "Warn", or other type of alert message in a repeater system. The SAME protocol that is broadcast by the NOAA transmitters has digital trigger codes for each geographical area in the country plus a "turn off" code that is sent at the end of the alert time period. The intent was that the "Watch" or "Warning" signals unmute the speaker, and the radio would talk until the "turn off" code was received. An indicator (usually a red LED) would stay illuminated until reset with a pushbutton.
The decoder design of the WR-300 does NOT support the "turn-off" code, hence once the receiver squelch is opened by a "Watch" or "Warn" signal the receiver just chatters for 5 (or so) minutes and then mutes the speaker when the timer expires. If a long message was received, or a second "Watch" or "Warn" signal was received the timer could mute the audio right in the middle of it.
Anybody have any info on the Midland 74-109 Weather radio ??
Is it timer based or does it understand the "turn off" code?
There is some additional Weather Receiver info on the Radio Shack page at this web site.
Plus there is a another web page devoted to generic Weather Receivers, including detailed info on the SAME system.
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Text, artistic layout and hand-coded HTML © Copyright 2005 and
date of last update by Mike Morris WA6ILQ
This page originally posted on 14-Sept-2004
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.