Uploaded February 2026 | Updated September 2026, 2 weeks ago
I set out to create a low cost, easy to build, way to connect my Koss SB40 headset to my Yaesu FT-891. Follow along to build your own headset adapter cable.
Become a patron! Unlock exclusive content at: patreon.com/kb9vbrantennas
Koss SB40 Communications Headset: amzn.to/4aITokJ
1FT 1/4 inch, 6.35mm, Female Jack to Bare Wire Open End: amzn.to/4s4wKbU
1 FT 3.5mm 1/8" Female Jack to Bare Wire Pigtail: amzn.to/4cu0aLW
1ft CAT6 Ethernet Cable RJ45, 24 AWG: amzn.to/4tLp7sA
Yaesu Microphone Wiring Diagram
Pin RJ45 Color Plug Color
1 Down
2 Up
3 +5v
4 Mic ground Blue 1/8" plug Black
5 Mic Blue/White 1/8" plug red
6 PTT Green 1/4" plug Red
7 GND Brown/White 1/4" plug Black
8 FAST
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Links may be affiliate links. As an Amazon Associate, I earn from qualifying purchases. This does not affect the price you pay.
*************
Like what you see? You can leave me a tip:
paypal.me/kb9vbr
KB9VBR VHF/UHF Antennas:
jpole-antenna.com
Become a patron! Unlock exclusive content at: patreon.com/kb9vbrantennas
Support Ham Radio Q&A by shopping at Amazon: amzn.to/2kO6LH7
My Parks on the Air setup:
Transceiver: amzn.to/3lmHoei
Battery: amzn.to/3xBGgbv
Tuner: amzn.to/2ZCNM9l
Folding Table: amzn.to/3xFIp5Z
Throw Weight: amzn.to/32QW2nB
Video Production Equipment:
Camera amzn.to/32UaXNX
Lens amzn.to/31mmDrX
Wireless Microphone: amzn.to/3xFVBb4
Microphone: amzn.to/3daoAdq
GoPro: amzn.to/3pkmP30
Music by license:
soundstripe.com
Contact Information:
Questions, comments, or business inquiries may be directed to kb9vbr@jpole-antenna.com. If you wish for your product to be featured on my channel, please contact me.
#Hamradio #AmateurRadio #POTA #ParksOnTheAir #PortableHamRadio #yaesu #headset #heil #KOSSSB40
I set out to create a low cost, easy to build, way to connect my Koss SB40 headset to my Yaesu FT-891. Follow along to build your own headset adapter cable.
Become a patron! Unlock exclusive content at: patreon.com/kb9vbrantennas
Koss SB40 Communications Headset: amzn.to/4aITokJ
1FT 1/4 inch, 6.35mm, Female Jack to Bare Wire Open End: amzn.to/4s4wKbU
1 FT 3.5mm 1/8" Female Jack to Bare Wire Pigtail: amzn.to/4cu0aLW
1ft CAT6 Ethernet Cable RJ45, 24 AWG: amzn.to/4tLp7sA
Yaesu Microphone Wiring Diagram
Pin RJ45 Color Plug Color
1 Down
2 Up
3 +5v
4 Mic ground Blue 1/8" plug Black
5 Mic Blue/White 1/8" plug red
6 PTT Green 1/4" plug Red
7 GND Brown/White 1/4" plug Black
8 FAST
************
Links may be affiliate links. As an Amazon Associate, I earn from qualifying purchases. This does not affect the price you pay.
*************
Like what you see? You can leave me a tip:
paypal.me/kb9vbr
KB9VBR VHF/UHF Antennas:
jpole-antenna.com
Become a patron! Unlock exclusive content at: patreon.com/kb9vbrantennas
Support Ham Radio Q&A by shopping at Amazon: amzn.to/2kO6LH7
My Parks on the Air setup:
Transceiver: amzn.to/3lmHoei
Battery: amzn.to/3xBGgbv
Tuner: amzn.to/2ZCNM9l
Folding Table: amzn.to/3xFIp5Z
Throw Weight: amzn.to/32QW2nB
Video Production Equipment:
Camera amzn.to/32UaXNX
Lens amzn.to/31mmDrX
Wireless Microphone: amzn.to/3xFVBb4
Microphone: amzn.to/3daoAdq
GoPro: amzn.to/3pkmP30
Music by license:
soundstripe.com
Contact Information:
Questions, comments, or business inquiries may be directed to kb9vbr@jpole-antenna.com. If you wish for your product to be featured on my channel, please contact me.
#Hamradio #AmateurRadio #POTA #ParksOnTheAir #PortableHamRadio #yaesu #headset #heil #KOSSSB40
