SignaLink USB Jumper Settings & Wiring Information
For Base & Mobile Radios

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See our SignaLink USB Product Guide to find the part numbers that are needed for your radio. If your radio is not listed, then please email us or give our Sales Staff a call at (800) 822-9722 (Mon - Fri, 9AM - 5PM PST).

IMPORTANT:  The information presented here covers hundreds of radios manufactured over many decades, by many different companies.  Tigertronics has done our best to insure that the information here is accurate.  However, due to circumstances beyond our control, including undocumented / poorly documented radio design changes, incorrect or incomplete information in radio manuals, etc., we have been unable to verify the accuracy of all of the radio wiring information that is provided here. This information is provided for reference only and is NOT intended to replace our detailed jumper installation procedure.  It is essential that you double-check this information against your radio's manual before doing the actual installation.  While it is fairly simple to install the SignaLink, it is possible to DAMAGE YOUR RADIO or the SignaLink by incorrectly installing it!

Updated:    March 7, 2025.  This is a major update to improve and expand the content of this page.  Please feel free to provide any constructive feedback that you may have using our Contact Form.

IMPORTANT NOTES

• Select The Correct Diagram - When viewing the jumper settings below, please take a moment to BE CERTAIN THAT YOU ARE LOOKING AT THE CORRECT DIAGRAM for the radio connector that you will be connecting the SignaLink to. For any given radio, there are likely to be a different jumper settings for the Mic, Data and Accessory connectors. This means that the first diagram you come to for your radio model could be the wrong one, so please look carefully!
  

• Jumper Wires vs Jumper Modules - The SignaLink USB can be configured with either jumper wires or an optional Jumper Module. Jumper Modules are available for most radios and greatly simplify installation.  Please see our SignaLink USB Product Guide to find the jumper module that is needed for your installation.
  

• RX Control Line (RXCTRL) - The latest revision of the SignaLink USB provides an "RXCTRL" line in addition to a standard PTT line.  A number of popular and inexpensive 10m, 11m, and 12m radios use both PTT and RXCTRL to switch between Receive and Transmit.  Previous versions of the SignaLink USB, as well as earlier SignaLink models, do not provide this feature, so your SignaLink's JP1 socket may not show the "RXCTRL" pin as depicted in the jumper settings below. If your radio requires this control line then you will need to upgrade to the latest SignaLink USB.  If your radio does not use the RXCTRL line, then you can simply ignore it.
  

• PTT Voltage & Current Limits - If you are using an older tube based radio, or an uncommon radio that is not normally connected to devices like the SignaLink or a TNC (etc.), then you should verify in your radio manual that the radio PTT requirements do not exceed the specifications of the SignaLink keying circuit (please refer to the SignaLink manual), and that the PTT line is “Grounded” to make the radio transmit.  If your radio exceeds the specifications listed or requires some other keying arrangement, then please contact our Technical Support Staff for suggestions.
  

• RECEIVE AUDIO / SPEAKER AUDIO - Receive Audio is available on the Mic, Data, and Accessory Port connectors of most radios.  If Receive Audio is not shown in the jumper settings for your radio (this is the "SPK" jumper) or if it is noted that only some radios may provide this signal, then you will need to check your radio manual to see if it is available.  If it is not available, then do NOT install the SPK jumper wire.  Instead, you will need to connect the supplied audio cable between your radio's External Speaker or Headphone jack, and the SPKR jack on the back of the SignaLink.  Please see the SignaLink USB Installation Manual for details.
  

• Jumper Installation for the older SignaLink "SL-1" and "SL-1+" models - The jumper settings shown below are for the SignaLink USB. However, the jumper settings for any radio Microphone connection should also work with the SL-1 and SL-1+, assuming that the radio uses a single standard PTT line only (the SL-1 and SL-1+ do not provide an RXCTRL line).  For installation of the PWR jumper on the older SL-1 and SL-1+ models, please refer to the SignaLink SL-1 or SL-1+ Installation Manual.
  

• RJ-45 Mic Connectors - There is a lack of standardization in the way that radio manufacturers number their RJ-45 Mic connectors.  We have numbered our connector according to the dominant industry standard (as shown below), and all jumper settings shown in our documentation reflect this standard.  Icom follows this standard, but Kenwood, Yaesu and some others do not.  All of the jumper settings show below have been corrected as necessary to account for any reversed pin numbering.  If your radio is not shown below and you need to figure out your own jumper settings, then you will need to carefully determine how your mic connector is numbered to avoid reversing the connections!
  

SignaLink™, Icom, Industry Standard                            Kenwood, Yaesu, Some Others

SELECT A MANUFACTURER

Please read the "Important Notes" above BEFORE you select your jumper settings.  This will save time and it may help prevent you from making a mistake that could possibly damage the SignaLink or your radio.

NOTE:  If you are looking for part number information for your radio, then please see our SignaLink USB Product Guide.

ADI

8-Pin Round Mic Connector - Use SignaLink USB p/n SLUSB8R or radio cable p/n SLCAB8R

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Alinco

8-Pin Round Mic Connector - Use SignaLink USB p/n SLUSB8R or radio cable p/n SLCAB8R

RJ-45 Mic Connector - Use SignaLink USB p/n SLUSBRJ4 or radio cable p/n SLCABRJ4

6-pin Mini-DIN Data Port - Use SignaLink USB p/n SLUSB6PM or radio cable p/n SLCAB6PM

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Azden

8-Pin Round Mic Connector - Use SignaLink USB p/n SLUSB8R or radio cable p/n SLCAB8R

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Drake

4-Pin Round Mic Connector - Use SignaLink USB p/n SLUSB4R or radio cable p/n SLCAB4R

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Elecraft

8-Pin Round Mic Connector - Use SignaLink USB p/n SLUSB8R or radio cable p/n SLCAB8R

Elecraft K3 and K4 rear panel Audio In, Audio Out and PTT connectors - Use SignaLink USB p/n SLUSBK3 or radio cable p/n SLCABK3

Elecraft KX2 and KX3 Mic connector - Use SignaLink USB p/n SLUSBKX3 or radio cable p/n SLCABKX3

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Icom

4-Pin Round Mic Connector - Use SignaLink USB p/n SLUSB4R or radio cable p/n SLCAB4R

8-Pin Round MIC Connector - Use SignaLink USB p/n SLUSB8R or radio cable p/n SLCAB8R

IMPORTANT:  This diagram is for the MIC JACK only.  If the SignaLink is attached to your radio's 8-pin Accessory Port, then please see the diagram below under "8-pin DIN Accessory Port Connector".

RJ-45 Mic Connector - Use SignaLink USB p/n SLUSBRJ4 or radio cable p/n SLCABRJ4

6-pin Mini DIN Data Port Connector - Use SignaLink USB p/n SLUSB6PM or radio cable p/n SLCAB6PM

8-pin DIN Accessory Port Connector - Use SignaLink USB p/n SLUSB8PD or radio cable p/n SLCAB8PD

IMPORTANT:  This diagram is for the ACCY PORT only.  If the SignaLink is attached to your radio's 8-pin Round Mic Jack, then please see the diagram above under "8-Pin Round MIC Connector".

13-pin DIN Accessory Port Connector - Use SignaLink USB p/n SLUSB13I or radio cable p/n SLCAB13I

NOTE:  The 13-pin ACC jack on the IC-275, IC-475 and IC-970 CANNOT be used with our SLCAB13I cable due to it's non-standard pin-out - DAMAGE TO THE SIGNALINK OR RADIO MAY OCCUR! On these radios you will need to attach the SignaLink to the mic jack or to a different ACC port if available.

24-pin DIN Accessory Port Connector - We do not manufacture a cable for the ICOM 24-pin Accessory Port connector but you can easily build your own using our un-terminated radio cable p/n SLCABNC.  To build your cable, simply wire it straight-through for pin numbers 1-8 (Pin #1 to Pin #1, Pin #2 to Pin #2, etc.).  Note that your cable MUST wired straight-through or the jumper settings shown below will NOT work, and you might DAMAGE YOUR RADIO OR THE SIGNALINK!

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Japan Radio Company

8-Pin Round Mic Connector - Use SignaLink USB p/n SLUSB8R or radio cable p/n SLCAB8R

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Kenwood

4-Pin Round Mic Connector - Use SignaLink USB p/n SLUSB4R or radio cable p/n SLCAB4R

8-Pin Round Mic Connector - Use SignaLink USB p/n SLUSB8R or radio cable p/n SLCAB8R

RJ-45 Mic Connector - Use SignaLink USB p/n SLUSBRJ4 or radio cable p/n SLCABRJ4

6-pin Mini DIN Data Port Connector - Use SignaLink USB p/n SLUSB6PM or radio cable p/n SLCAB6PM

13-pin DIN Accessory Port Connector - Use SignaLink USB p/n SLUSB13K or radio cable p/n SLCAB13K

NOTE: Our SLCAB13K cable works with ALL Kenwood radio's that have a 13-pin Accessory Port.  However there are three possible settings for the PTT jumper.  If your radio is not listed below in Figure 1 or Figure 2, then you will need to try both jumper settings to determine which PTT configuration your radio requires. We suggest that you try the settings in Figure 1 first. Please note that your radio will NOT be damaged if you install the PTT jumper using the wrong configuration - you just won’t be able to transmit properly (no power output, hot mic, etc.).  After you have installed the jumpers, be sure to set the sound card audio levels as outlined in the SignaLink manual. If you do not set the levels correctly, then the SignaLink may not transmit, and you might mistake the problem for incorrect jumper settings.

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Midland

4-Pin Round Mic Connector - Use SignaLink USB p/n SLUSB4R or radio cable p/n SLCAB4R

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Radio Shack

RJ-45 Mic Connector - Use SignaLink USB p/n SLUSBRJ4 or radio cable p/n SLCABRJ4

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SGC

8-Pin Round Mic Connector - Use SignaLink USB p/n SLUSB8R or radio cable p/n SLCAB8R

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Ten-Tec

4-Pin Round Mic Connector - Use SignaLink USB p/n SLUSB4R or radio cable p/n SLCAB4R

5-Pin DIN Accessory Connector - Use SignaLink USB p/n SLUSB5PD or radio cable p/n SLCAB5PD

8-Pin DIN Accessory Connector - Argonaut VI, Eagle, Orion & Orion II Only  - Use SignaLink USB p/n SLUSB8PD or radio cable p/n SLCAB8PD

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Yaesu

4-Pin Round Mic Connector - Use SignaLink USB p/n SLUSB4R or radio cable p/n SLCAB4R

8-Pin Round Mic Connector - Use SignaLink USB p/n SLUSB8R or radio cable p/n SLCAB8R

RJ-11 Mic Connector - Use SignaLink USB p/n SLUSBRJ1 or radio cable p/n SLCABRJ1

RJ-45 Mic Connector - Use SignaLink USB p/n SLUSBRJ4 or radio cable p/n SLCABRJ4

SignaLink USB Jumper Socket	Pin-out	Radio Models	Notes
	Pin 1 – N/C Pin 2 – N/C Pin 3 – N/C Pin 4 – GND Pin 5 – Mic Input Pin 6 – PTT Pin 7 – Speaker Pin 8 – N/C	FT-891 FT-2400 FT-2500 VX-2000U** VX-2100** VX-2200** VX-3000U**	Speaker audio is available on some radio models.  Check your radio manual and install the SPK jumper only if this signal is provided. If it is not, then you will need to connect the supplied audio cable as outlined in the SignaLink USB manual. **These radios provide differential audio output on the radio's External Speaker jack.  You MUST use a cable with a built-in audio isolation transformer to attach this output to the SignaLink or you may damage the radio.
	Pin 1 – N/C Pin 2 – N/C Pin 3 – N/C Pin 4 – Mic GND Pin 5 – Mic Pin 6 – PTT Pin 7 – GND Pin 8 – N/C	FT-450 FT-600 FT-817 FT-857 FT-897 FT-900 FT-991 FT-991A VX-2100 VX-2200	Speaker audio is available on some radio models.  Check your radio manual and install the SPK jumper only if this signal is provided. If it is not, then you will need to connect the supplied audio cable as outlined in the SignaLink USB manual.

5-Pin Din Packet Connector - Use SignaLink USB p/n SLUSB5PD or radio cable p/n SLCAB5PD

6-pin Mini DIN Data Port Connector - Use SignaLink USB p/n SLUSB6PM or radio cable p/n SLCAB6PM

FT-847 ONLY - 3.5mm Stereo "Data I/O" jack for HF ONLY - Use SignaLink USB p/n SLUSB847 or radio cable p/n SLCAB847

NOTE:  A fully assembled radio cable and jumper module (with built-in cap/resistor) is available for this connection.  Order radio cable p/n SLCAB847 and jumper module p/n SLMODHT.

If you would like to operate the FT-847 on other bands, then you'll need to connect the SignaLink to either the Mic jack (this works on all bands for virtually all modes), or the 6-pin mini-DIN Data Port (this is for VHF/UHF FM or LSB modes only, not HF).

The values shown below for R1 and C1 have been used for decades in a number of our products.
You can use these values, or those shown in the FT-847 manual.  Both will work just fine. 

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