Another (slightly customized) TinySWR is ready and works as expected - not as a SWR Meter but as a SWR and RF Indicator - excactly as promised by the circuit developer.
Many thanks again, Martin@DK3IT.
My TinySWR should especially draw my attention if there is a real problem with the home made resonant antenna (trapped/linked EFHW) used together with the Mountain Topper Transceivers. That’s why I used different colored LEDs - the red LED starts to glow at antenna loads of: infinity, short circuit, <= 20R and >= 125R (SWR of approx. 2.5). The yellow LED starts to glow at <= 33R and >= 75R (SWR of approx. 1.5).
Modifications made (all the LEDs are low current types from Knightbright):
R4: 680R
RF1, SWR1: green LED (1.9V)
SWR2: yellow LED (1.85V)
SWR3: super red LED (1.7V)
The filter housing FG1B 37x20x20 mm used is very tight …
http://www.box73.de/product_info.php?products_id=2887
… the next larger FG2B 50x20x20 mm may be better suited for less experienced builders