Things have been crazy busy around here lately. Along with a notable increase in the number of duplexers coming in for tuning (some including repairs), there have been several broadcast engineering service calls. Here’s some of the fun that has been included. Retuning of Marti STL in order to get a new low power FM […]
Category: Repair
Reinstalling the 72 MHz Simulcast Transmitter for Warm-Up Period
Just a couple of photos taken while reinstalling a Quintron 72 MHz paging system simulcast transmitter for a client. This is the “main” simulcast transmitter. We switched over to the “backup” transmitter to give it another workout while pulled and I did a re-check of this transmitter, which I had repaired and realigned back around […]
Swann Surveillance Systems Plagued By Cheap Power Supply Burnouts
If you own one of the Swann brand multi-camera surveillance systems (I maintain multiple systems at multiple locations) and it has one of these type power supplies (see figure 1 and figure 2), BEWARE! These power supplies are almost 100% guaranteed to fail. To make matters worse, before they fail completely they are very likely […]
Generac Automatic Generator Transfer Switch Repair
The Generac automatic backup generator system had failed at a client’s transmitter site. It would not fire up and transfer to backup power if the AC mains failed. I diagnosed it down to the 12 VDC transfer control relay, which I replaced. When I left the site, the system was back to operating exactly as […]
Thank You, Occam – LG 32LC5DC 31″ HDTV Power Problem Solved
KE4COL Repeater Not Quite Ready To Go Back Into Service
Update on KE4COL Repeater and Other Little News Tidbits
Just a little update on what’s happening with the KE4COL 145.230 Gold HIll repeater repairs/testing, and a few other cool things going on lately. KE4COL Mastr II UHF Appears Good To Go Back Into Service The 145.230(+)123.0 VHF Mastr II continues to behave well here in the lab since I serviced and realigned it […]
Troubleshooting & Aligning KE4COL 145.230 Mastr II Repeater
Last Friday, we pulled KE4COL’s Mastr II 2-Meter repeater out of service due to some intermittent “crashes” on COS drops, strange noises, etc. which had been occurring for a while. I brought it here to the lab and finally got around to going through it today. I found and addressed a few issues and it […]
Gold Hill 442.175 MHz DMR Repeater Back Online After MOSFET Replacement
The Gold Hill, AL 442.175(+) KK4ICE DMR Repeater went back online a little around sunrise on Saturday, June 9th, 2018. Following replacement of the burned-out MOSFET power amplifier chip, the repeater was reinstalled with an external power amplifier connected in order to decrease the load on (and the heat inside) the DR-1X repeater’s transmitter radio. […]
Gold Hill 442.175 Repeater Down Temporarily and East Central AL DMR Talkgroup Update
Gold Hill, AL 442.175 Repeater down for a few days due to PA failure Apparently things over on timeslot 1 were really, really busy this past Saturday night. The dual-pack MOSFET final transistor in the transmit radio in the Yaesu DR-1X repeater… well, we “let the smoke out of it.” A replacement transistor is on […]