QYT KT-7900D purchased in 2023. Nothing changes, modifications and adjustments
In this video, the QYT KT-7900D radio station, purchased in 2023, was sent for revision, but it also turned out to be a factory defect, a transistor in the driver was not soldered. I replaced the thermal paste, installed an additional radiator, adjusted the low-pass filter to work at SATCOM frequencies.
⏰ Temporary contents:
00:00 Introduction.
01:30 Disassembling the radio
04:42 Old jelly thermal paste
05:39 Suitable radiator
05:10 Summary and conclusions
07:15 New washer for the transistor
07:38 What I cut the tubes with
07:58 New radiator
09:04 Assembling the radio
10:23 Reason for unstable operation
11:48 Drilled holes in the bottom cover
12:08 Checking the output power
12:51 Summarizing
#QYT KT-7900D#SATCOM#Mods#Revision#