First (easy) test of the QB-150 Amps: Does the one with the top installed work? Answer: Yes! Measured 12.6 K Ohm on the power pin to GND. Applied 12.2VDC, measured ~120 mA current draw. Tested with NanoVNA-H4 with 40 dB pad on input side and found it has ~ +24.5 dB gain @ -50 dBm input level through the HF range (-3dB at ~ 446 MHz). Good to have a working sample to help with debug of the failed units. #HamRadio #RFAmplifier

Repair RF Amplifier Project: With some time off ahead, dug out the box of Q-Bit QB-150 RF amplifiers. Likely these are all toast, but will test and troubleshoot to confirm. (These were pulls from a field HF antenna system that occasionally had lightning strikes which zapped the input which then drew too much current and burned up the bias supply components. The board outside of a case is blackened and covered with soot. The others have burned bias parts.) #RFAmplifier

What is inside a Mini-Circuits ZFL-2000 RF Amplifier? Had a few minutes to take a quick look inside one of these RF Amps. Didn’t learn much, and was surprised to see a fully-cased (pins) amplifier module inside. Would take a lot more effort to disassemble further…
#HamRadio #RFAmplifier #LookInside
https://www.minicircuits.com/pdfs/ZFL-2000+.pdf

The input connector was removed and replaced with SMA connector, perfect for the amplifier cover.
RF Isolator and output connector removed and soon replaced by a small piece of coax and another connector. 👍
Which connector can i use on the PCB directly ? 🧐🤔
#qo100 #datv #AmateurTelevision #digital #pa #poweramplifier #rf #rfamplifier #palletamplifier #hamradio #AmateurRadio #radioamateur

Again today, i receive my new Eurorack 19 inch rackable 3U box for my DATV TX project Portsdown 4 with touchscreen and RF Amplifier, all in one and portable, I’m going to make it mobile powered with 12V, diy for the best !!!
#qo100 #datv #AmateurTelevision #portsdown #portsdown4 #touchscreen #digital #pa #poweramplifier #rf #rfamplifier #palletamplifier #hamradio #AmateurRadio #radioamateur

New pallet RF Amplifier 2,6GHz editable to 2,4GHz with some mods, i want to use it for DATV to QO-100.
#qo100 #datv #AmateurTelevision #digital #pa #poweramplifier #rf #rfamplifier #palletamplifier #hamradio #AmateurRadio #radioamateur