I purchased a non-working Motorola R2210B/HS service monitor just to take a look and see if it was repairable. In Part 3, I fix and test all the issues found and end up with a working service monitor.
I purchased a non-working Motorola R2210B/HS service monitor just to take a look and see if it was repairable. In Part 2, I identify parts the will need to be replaced and how I tested the relays.
I purchased a non-working Motorola R2210B/HS service monitor just to take a look and see if it was repairable. Part 1 of the video is the teardown of the basic unit and troubleshooting the LVPS section.
Operation and Teardown of a Motorola R-1150A 1980's Tone Synth.
How-to get a great soldering system setup. Buying used Metcal and Thermaltronics to assemble a great soldering system. I've been over my Metcal setup in an older post but this a video of the setup and how to get what you need for a great setup.
Video of how to take the Wouxun apart, complete down to the board level. Overview of repair areas.
BFDX TD-503 DMR RADIO
I've been using the BFDX TD-503 for several months on the local DMR repeater and NCPRN. The main reason I really like it and its found its place above my Mototrbo and Hytera is it the GUI by default shows the Frequency and Channel Name. Controls are standard and easy to use. The case is high quality and it has some heft to it.
It has been left out in the rain, taken on swift-water calls (submerged in the river), dropped, banged, and otherwise abused with no issues whatsoever.
Programming is easy and the cable is inexpensive. The audio quality is better or on par with both my Hytera and Mototrbo's in both analog and digital mode. This radio works great on analog repeaters as well. I've been using this pretty much exclusively for any outdoor adventures (UTV'n, Rafting, Swift-water Rescue, Climbing) without fail, mainly because of its price point and performance. At $250 brand new its much less expensive than a used Mototurbo or Hytera.
I had some issues with the audio on this so bear with it. Also standard definition only.
Just a quick video of what's next in Ham radio and some projects I've been working on, as well as others, to get there. Some highlights:
- MultiCodec - Codec2, AMBE...
- Remote Standardized Head Unit / Retrofit
- Less PC .. More Embedded
- More modular
- Easier to use and the possibility of installing station away from Radio.
- DSP development in the hands of more people.
- Older Designs get updates.
- Powerful Tools getting more accessible
- KiCad (New stable, RF Traces (Curved), Diff Pair Routing (USB, etc))
- Inexpensive STM32 and other DSP platforms
- Filter Creation and Simulation
An open source codec for compression is up and going (CODEC2).
AMBE is much easier to implement and get ahold of.
Remote heads are beginning to pop up commercially in the FlexRadio line.
More embedded projects/products including SM1000, FlexRadio head unit, and many many DStar node adaptors.
DMR radios have hit the market to warm up the digital voice market, many which are under $300 new.
ICOM IC-208H Background
Looking for something to play with I was the lucky bidder on a non-working IC-208H ICOM Dual Bander radio on Ebay. It looked ok but was listed as non-working. They also disclosed it would not power all. All of these things were correct. A more accurate description would have been "Used on the show Deadliest Catch but the boat sank to the bottom. Recovered 2 months later".
I'm guessing it was installed on a boat and wouldn't surprise me if said boat was at the bottom when this radio was removed. The head unit was in great shape so not a complete loss.
Since there was severe damage from the apparent reverse hookup and water damage it wasn't something I could or would repair. I did end up with some spare parts, a good IC-208H head, new power cord, and a working Mic.
The mic connector was completely trashed with green tented heavy corrosion. Inside both side of the board had been exposed to water and dirt. Even without the badly damaged PCB craters it was deemed a lost cause as soon as I opened the case. Stay tuned for a teardown of the IC-208H head unit as this appears to be in great shape and I want to see if and how it ticks before parting with it.
ICOM IC-208H Teardown Video
Teardown video of a beaten down ICOM IC-208H. I'd really like to know what this radio has seen.
HAMTRONICS REP 200 VHF REPEATER
The local club came to me to add TX PL Mod to the local VHF repeater. It's a well aged Hamtronics REP 200 that had one tone board installed for RX. They specifically requested that the TX board only transmit during reception of the RX PL tone. This is to allow you to setup a RX PL so that you only hear voice traffic.
I reviewed the new tone board and the REP-200 schematic and whipped up something that worked. I mounted the new Tone Board close to the existing one. I used a transistor on the new board to control the existing REP-200. Before giving it back to put into service, a slight alignment was done and thorough testing, including burn in. Its been on the mountain working now for at least 2 months with no issues.