Topic: FS: Complete DIY Digital Spread Spectrum FRS Radio setup $120 shipped
For Sale is my DIY radio setup suitable for (3) drivers that I used for my first six races. I have since switched to an SMS texting based system which works much better where we race (Sears point has good 2G cellular coverage and none of us liked someone yakking in their ear, and we aren't a serious enough team to have the pit folks constantly monitoring traffic for our drivers). All in, I probably have a few hundred dollars into this setup but that's over the course of a few years of tweaking (we do one race a year and some races we were only able to run for a morning before blowing an engine) so that's not too bad.
- This system is built around TriSquare eXRS model TSX300 radios -- a proprietary digital spread spectrum (DSS) implementation of FRS radios.
- It's FRS so you will never be "that team" that steps on safety frequences.
- The DSS part means you never have to worry about other teams chatter blocking your ability to send/receive comms with your team (an issue when you have 120+ teams in one course); the radios are already setup on the same security key and "just work".
- It's FRS so the transmit power isn't great. While this radio worked great while our "pit" radioman was outside, for the last several races we rented a garage and the building itself acted like one big faraday cage for our radio.
- Getting in/out means you have to unplug two plugs. IF you dont, you will probably tear one of the wires and it's a giant PITA to solder the tiny wires that make up these harnesses (Power and ground for each of the 1/4" and 1/8" plugs). THE DRIVER HEADSETS ARE THE MOST DELICATE PART OF THE SYSTEM.
- Going with my IMSA adapter will help this issue but you will still need to plug/unplug the driver and if you use the harness included with this kit. The fancy IMSA headset I bought to run with another team (NOT included in this package) had good speaker audio volume with this setup but with the IMSA headsets I'm including the mike was great but the audio sounded kind of weak. More tweaking may be needed (maybe an amp circuit on the headphone side?)
I tested all of the headsets last night and they work with the caveat about the volume of the IMSA headset. If you are looking for a starter lemons comm setup and aren't afraid of tweaking/repairing things as needed, this setup is worth considering as it's a setup up from the basic FRS radio setup. If you just want a system that works flawlessly so you can run around the entire paddock acting like you are a NASCAR team and/or fast food workers, I'd suggest that you wait for a team to disband and buy their fancy pants racecar comm setup for several hundred bucks.
If interested, my price is $120 shipped OBO. Email me to arrange for payment via paypal. If you want to check out the setup, you can inspect it at my office in Mountain View, CA or at my home on the evenings/weekend in SF, CA. I'll also ship everything within the continental US.
Contents of the System:
(1) TriSquare eXRS radio model TSX300 modded to accept external antenna. Runs on (3) AA batteries
(1) TriSquare eXRS radio modded TSX300 to accept external anetenna + cigarette adapter power
(1) TriSquare eXRS Manual: read up on how you can set the key, send text messages, etc. https://www.buytwowayradios.com/Product … manual.pdf
(1) TriSquare battery charger and dead battery. It seems like new batteries can be bought for $10 on ebay but honestly, AAs work just fine.
(2) Antennas in PVC: my buddy calculated the appropriate length of wire inside for the FRS frequency band (he clearly paid more attention in the RF classes than I did.
(1) Car harness. Plugs into the 2.5mm(?) headset jack on the car radio and breaks out the mike, speaker, and plug for "push to talk" button
(1) Push to talk button
(1) 20' set of 1/4" and 1/8" extension cables: used to run from the car harness near the car radio around to a spot convenient to connect/disconnect the driver
(1) IMSA to 1/4" and 1/8" adapter. Allows you to plug in a standard IMSA headset into this system.
(1) 20' female-female COAX cable w/ Male-Male adapter -- spare. I used when trying to mount the pit-side radio antenna on a tower
(1) 10' female-female COAX cable w/ Male-Male adapter. I used this on the car to route the antenna high up at the rear of the car
(1) 6' female-female COAX cable w/ Male-Male adapter. I used this to mount the antenna a little higher up (say on a stick above a camp chair in the pits)
(2) 2.5mm(?) headsets w/ small push to talk microphones. Used for the pit-side radio
(2) 1/4" and 1/8" helmet headset kits for drivers to wear. stick the earbud in the driver's ear and mount the mike at the front of the helmet near the driver's mouth with velcro - BOTH testing working
(1) used IMSA helmet kit. When tested, Microphone works great but speaker sound is a little quiet
(1) new IMSA helmet kit. Still in bag as bought from Rugged Radios.