I?m very angry about the tx quality of the high bands QDX, Rev 5. my first QDX high bands (rev3) was killed after a few day working good. I decided to buy a new one assembled. After 4 Months waiting I received it today. Testing the 20m Band with 12 Volts exactly and a Z-Tuner and lw with swr better than 1.5 I could start and got a QSO with a station in Russia. I used no Case. Trying to start a cq call I got an answer from a station in GB. While sendig and returning the call one of the BS170 went into smoke. I?m shure that I didn?t make any mistake. Sorry Hans , the trx system push to pull without any Protection is a peace of shi.... I can?t put it in other words. I?m very frustrated and agry. Using? the same frequency, voltage and antenna, i could make QSOs without any problems with two other competition KIT trx ,? the ADX-s and the QRP-Guys Digital III trx . These devices uses 3x BS170in parallel like the QCX. But are protected wit a zener diode. These devices, also for the high sw bands (20-10m Modules) never failed. I could make a few hundred qsos on all bands between 20m and 10m. What is the advantage of a hightech QRP transceiver, with better signals and better receiving results (thats true , absolutely fantastic QDX ), when the trx will not survive a handful of qsos ? especially the high bands QDX seems to have this problem.
I hope that the QMX KIT(ordered in May) will not make this problems. Hans you told me in Friedrichshafen , that it is protected against high voltage and bad SWR.
73 de Matt
