In order to view photos and records of service and repairs, just select and click on the link in the following list:
2019-02-27 Sinclair Q2330 6-Cavity VHF Duplexer, S/N: CC31901-1-1
Disassembled, four capacitors replaced, reassembled, tuned, and tested.
2019-02-22 WFAZ FM 90.9 Nautel VS2.5 Broadcast Transmitter Repair
Lightning had damaged some of the Power Amplifier (PA) Modules and the power combiner network in the transmitter.
2019-02-15 Repair and Re-Start of Harris HT20CD 21KW FM Transmitter for WRLD 95.3 FM
Transmitter had automatically shut down due to failure of phase detector relay module. Station operated on backup transmitter during the downtime of this transmitter.
2019-02-14 WACQ 98.5 FM Marti STL Receiver and Antenna Realignment and Translator Broadcast Startup
Marti STL Receiver for the station’s new 98.5 FM translator needed realigning due to STL frequency change. The STL receive antenna at the site could not previously be aligned for peak signal strength, and the translator was not yet broadcasting due to lack of STL signal to drive the broadcast transmitter. Station/translator began broadcasting station programming at approximately 12:55 p.m.
2019-01-27 Repair and Retune Wacom WP-678-R2 UHF Duplexer, S/N: 14549-E
Sent in for repair because duplexer would overheat and stop passing RF on the Low Pass side (used as Tx side on GMRS repeater) during high duty cycle repeater use. A final P.A. had been damaged as a result. Diagnosed as failing Johanson capacitors. Replaced capacitors and duplexer tested great after repeated and extended application of around 75 Watts of transmitter power. SWR, isolation, and Insertion Loss improved and duplexer assembly is performing better than factory specifications after repair and retuning.
2019-01-23 Tuning and Testing of RFS TDE7780A Mobile/Compact Duplexer, S/N: V177557A-030. Sent in for testing/repair/tuning due to severe problems on receive side of duplexer. Problem turned out to be a tuning issue: the SWR was extremely high in the Low Pass Branch (the owner’s Tx branch) which was causing massive Tx energy to reflect over to the High Pass Branch (the Rx branch in this user’s application), severely desensing the receiver.
2018-12-22 Repair of Quintron QT-4201 Paging Transmitter S/N 10740E1062, Which Had Begun To Only Intermittently Transmit (Note: the QT-4201 is essentially the same as the QT-4501, except for the transmit frequency range.)
2018-09-29 Mobile/Compact Duplexers, Retuned and Tested
(Above document includes Duplexer Service ID’s 20180929-01 thru 20180929-03)
2018-03-06, Motorola 0185417U05 UHF Duplexer, S/N: Y4099KM321
* Note, this duplexer was manufactured by RFS/Celwave, model # PD526-4-2
and sourced by Motorola for use in Quantar and Quantro stations/systems