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Additional Alinco Information
Compiled by Mike Morris WA6ILQ
Maintained by Robert Meister WA1MIK
The DR135TE, DR-235T and DR-435TE radios are popular with the IRLP folks as they are inexpensive. Unfortunately the internal CTCSS decoder has very poor performance. I mean it is really bad - it's slow to open and can take from 1/2 second to as long as four seconds (!) to close.
Glen Roe WA6MHA uses one as a point-to-point link from an IRLP node to the local repeater. He ended up disabling the internal decoder and adding a TS 64 Decoder. He documented the procedure here (a local copy), or you can go to http://www.irlpcables.com/AlincoTS64.html for the original writeup (offsite link).
|Microphone Jack Pinout|
Many Alinco radios use a round 8 pin mic jack with 7 pins around the
outside and one in the middle.
Click here for a photo.
There are tiny numbers molded into the
plastic on the plug and jack. Several Alinco and Kenwood radios use this pinout:
Many radios that use the 8-pin modular mic jack ("RJ-45" style) use this pinout:
With the locking tab down, and looking into the connector or at the back of the
plug the pins are numbered from left to right.
|"Data" Jack Pinout|
Many Alinco radios have a DE-9 connector on the back of the radio. When the
EJ-41/U optional TNC board (for the DR-135, DR-235, DR-435, or DR06 radios) is
not installed the ribbon cable from the connector is plugged into the
control board and audio, COR and PTT signals appear on the pins as per the
left side pinout below for connection to an external TNC. When the EJ-41U
board is installed the ribbon cable is moved to that board and the pinout
changes to the right hand list below. The EJ-41/U instruction manual is
here and a photo is
here. Note that the EJ-41/U
designed to fill the basic packet communication functions, such as
keyboard operations and APRS. For more elaborate operations requiring
KISS mode, digipeater mailbox functions or node operations, do not use
the EJ-41/U, instead use an external TNC like a KPC, an AEA, etc.
Heavily Biased Personal Opinion:
I do not recommend Alinco mobiles for use as a point-to-point link radio or as a repeater transmit radio. Buy a used YaeComWood or even a Motorola GM300 - but watch the duty cycle. Why? For one, the CTCSS decoder in the Alinco is slow to decode and does not release properly. Adding an outside decoder (like a Communications Specialists TS-64) fixes that but why should the customer have to buy another piece of hardware to patch Alinco's bad design?As a carrier squelch mobile, or as a packet radio, they are great... especially as a "first radio" for a new ham.
Alinco should fix their design - or copy the one in the cheapest Yaesu, Kenwood or Icom - any of those does a better job. It's not a difficult design, even my old Motrac did it better, and it was built in 1962, 50 years ago.
Secondly, the Alincos seem to work when new, but you have to leave them in carrier squelch. Plus, over time I have had nothing but trouble. I was helping a gentleman that was putting up a 2m repeater on a extreme budget. It took an original and three replacement radios over 17 months at one location before we got something that lasted - and no, we were not abusing the duty cycle, nor was the operational temperature out of spec (how do you abuse the duty cycle on a UHF control receiver?)
The author can be contacted at: his-callsign // at // repeater-builder // dot // com.
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This page separated from the index page on 25-Jan-2014.
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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.