Samlex 1223 power supply noise


I’ve had a Samlex SEC 1223 – 23 amp power supply for many years now and it has always made a strange noise. I have two Uniden BC350A scanners hooked up to it that I use to stream local repeaters to Radio Reference / Broadcastify.

I decided to record the noise with my digital audio recorder so I could get some feedback from others on what it might be. It starts in the off position and then you hear me flip the switch on and then off again. (ignore the background noise of my furnace)

If you have any ideas what it is or how to fix it, please let me know. Thanks!

Champaign IL ham radio repeater stream

I recently got a wild hair to stream some ham radio audio. I’m already familiar with the streaming process as I stream the Champaign, Illinois NOAA weather radio on Wunderground. My plan was to run a stereo feed with the left channel going to one repeater and the right channel going to the other repeater.

I found a decent deal on some Bearcat BC350A’s on eBay, so I purchased 2 of them. I debated on adding a second sound card to the computer streaming the weather radio, but decided it’d be easier to just use a second computer. Luckily I had an old Dell Optiplex GX260 here that would be suitable for streaming. I have the scanners hooked up to my old Samlex 1223 power supply. I had mixed feelings if this would even work as it had some issues with the HF rig, but so far it’s been running great. The antenna setup is tricky since I am unable to put up anything outside.

The scanners came with a simple window mount antenna with suction cups, but the gear was too far from any windows. When I first tested the audio, the signals would fade in and out and they were picking up interference from surrounding electronics. I did some research on splitting antenna signals and decided to go the cheap route. I found some RG6 quad shielded coax and used that to stretch across the room to the window. I have that hooked up to a 4-way cable TV splitter. I have several adapters converting from F to BNC. Some folks say that will cause a lot of signal loss, but in my situation it shouldn’t matter too much. I live within a mile of the tower that the repeaters are located on, so the using suction cup antenna in the window should suffice.

I decided to use Radio Reference to stream my feed. They mainly focus on public safety feeds, but they also allow ham repeaters on their network. Basically I send my stream to their servers and they stream it to whoever wants it. They can support tons of traffic vs me trying to run the feed from my home DSL line. I was hoping to get my feed approved ASAP as we were expecting some severe weather during the week.

I was approved on May 23rd and went live in the morning on May 24th. On May 25th, we were expecting some nasty weather. One of the repeaters on my stream is the local ARES repeater which runs weather nets as needed. Sure enough, we were under a tornado watch and even had a tornado spotted outside of Champaign. I checked the stats afterwards and discovered I had 35 visitors during that time. That made me feel like my efforts to get the stream going were put to good use.

As mentioned earlier, the stream consists of 2 repeaters split across the left and right channels. That is, you’ll hear one repeater on the left speaker and the other on the right speaker. The repeater on the left is the K9CU repeater on 146.760 Mhz. This repeater is connected to Echolink and is a general purpose repeater. It has a weekly Thursday night net open to all ham operators. (9pm local time) The repeater on the right is the K9SI repeater on 444.100 Mhz. This repeater is the Champaign County ARES repeater which runs the weather nets. They also have a weekly Tuesday night net for both ARES members as well as any other hams who wish to check in. (9pm local time)

There are several Android and iPhone apps that interface with the Radio Reference streams. There is one app for iPhone called 5-0 Radio that has my stream available. If you want more details on the stream, here is the link to my feed page at Radio Reference:

K9CU 146.760 Mhz and K9SI 444.100 Mhz Amateur Repeaters

If you have any questions about the stream that I didn’t cover, please post them in the comments section. Thanks!

Yaesu VX-8R audio fix

I’ve had my Yaesu VX-8R HT for about a year and a half now. It’s been a nice little radio except for an annoying issue with the audio. When pushing buttons, the audio sounded weaker and scratchy. I noticed that pushing down on the speaker improved the quality. I’ve lived with it for all this time and finally had enough.

I started browsing various internet forums and ran across a solution that seemed to fix the problem. It appeared to be a simple fix which required no soldering and very little tools.

The author of the article posted a nice video on YouTube showing the steps he performed to fix the same problem on his HT. The basic solution was to slightly bend the speaker contacts on the main board of the radio so they would make a better connection with the speaker on the front of the case.

I figured I’d give this a shot. I dug out my small tip screwdrivers and followed his steps to open up the radio. I adjusted the contacts and put the radio back together. I felt energized until I turned the radio on and it said ‘Clone’. At this point I was thinking I had damaged something on the board. I took a deep breath and dug back into the radio again. I bent the contacts down a bit just to make sure they weren’t touching something else on the radio.

I put it back together and turned the radio back on. It came up normally this time. I pushed a ton of buttons and the audio was perfect, no scratchy audio this time. Yay!

I did take a few pictures while I had the radio apart just for kicks.

Total credit goes to the unknown author’s detailed description and YouTube videos from the forum below.

Source: Worldwide DX Amateur Radio Forums (unknown author)

Have you experienced this issue? Did the solution described above fix your problem? Let me know in the comments section.