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RFI problems running RTTY - You may never have an RFI problem when running SSB, but all of a sudden you find RFI creeping into your system when using RTTY. Learn why and how to solve it.

Another Problem with the Alpha 9500 - AB4D post on a tube defect of Alpha 9500 power amplifier

Alpha 9500 blower problem - How to reduce noise on Alpha 9500 amplifier fan.

ICOM IC-7000 Low Power Output - How resolve low power problems on Icom IC-7000

TS-590 ALC Overshoot PAD MDS and IP3 - A DK5TX article on Kendoowd TS-590 ALC problem with ALC spikes and other interesting topics

Find RFI causes in mobile operations - Troubleshooting your power supply, in determinig connections to battery, alternator and regulator interference and checking power supply leads.