It's a great part, other than the fact that it cost $12.80 for a tray of 1000, (About $20 per part in smaller quantities), is a single sourced part with no replacements if it becomes unavailable, and it's a ball grid array package, making it totally impossible for a purchaser of the QMX to ever replace it.??
-Steve K1RF
------ Original Message ------
Date 8/29/2023 12:08:18 AM
Subject Re: [QRPLabs] QMX - smoke - another C107/Q108 failure
I think that given all of the people experiencing blown components due to power supply issues (including myself), there is a case to be made for a redesign of the power supply. Something like an can replace 38 parts in the current design with 8, with significantly better performance in every way. The frequency of the part can be externally synchronized, but you can also simply configure it for 2.2 MHz, where every harmonic is a minimum of 400 kHz from any of the amateur bands covered by the QMX.
