Any ideas for an inexpensive and safe way to connect RF spectrum analyzer to 1+ kW HF or 6m or 2m linear amplifier? I have HP 8594E in my home lab but I do not own any professional 1 kW level attenua
I made a directional coupler. I used the 'Wainwright' 50 ohm strips - these are strips of PC board with the the correct width of track for 50 ohms and with glue on the back - and stuck them to a shee
Ilkka, I use an HP 778D 20dB directional coupler for this application. 1kW applied yields 10W at the -20dB decoupled port, then I just use an ordinary 20W attenuator (Bird, Narda, HP, whatever -- lot
I thought the power rating for HP 778D is 50 W average 500 W peak. Usually HP peak rating is for 1 microsecond or shorter pulses and average power rating is average over one second. Thank you for th
Hi Ilka, I've used this specific model (778D) for several years at 1 kW PEP SSB or CW without any ill effects. There's nothing active in it, and the internal pass-through conductor is large; I cannot
If 1kW 'forward' results in 10W coming out of the 'forward' line, doesn't 10W also end up in the terminating resistor on the 'reverse' line? The coupling spec. is 20dB nominal from 100MHz upwards - I
[Steve Katz] Isn't the reverse line termination power diminished by the return loss? That is, if VSWR = 2.0, then reverse line power would be 10W reduced by 10dB, or 1W? -WB2WIK/6 [Steve Katz] You m
The forward and reverse lines don't know which way round they are, they both pick up forward and reverse power from the through line. The reverse output delivers the coupled reverse power in isolatio