Thank you gentlemen, plenty of info and ideas.
Being my first SA, and loving to tinker with such glowing & beeping devices as an amateur, I can only make good use of your experience.
First of all, yes : I cannot afford to get a 1KW Bird Attenuator, although it would be perfect, so I will have to lower my target.
The more powerful radio I own got this specifications :
Output power (cont. adj.)
HF/50 Mhz -> 2-100W (SSB/CW/RTTY/FM/DM) 2-25W (AM)
144 MHz -> 2-100W (SSB/CW/RTTY/FM/DV)
430/440 MHz -> 2-75W (SSB/CW/RTTY/FM/DV)
1200MHz Mhz - > 1-10W (SSB, CW, RTTY, FM, DV)
Most of the other radios will not go beyond 50 W @144 Mhz and/or 35 W @ 430 Mhz
As you can see, I will not ( for the moment ) need to go beyond 1200 Mhz/10W, no AMPS.
I was thinking about this attenuator :
http://194.75.38.69/pdfs/BW-40N100W+.pdf But from the data sheet I read : "Average power at 25°C ambient, derate linearly to 50W at 100°C, bi-directional"
Now, from your experience, to stay within amateur stability & reliability tolerances how much time it takes for a device like that to get "hot" as G0HZU suggest with the power and frequencies involved ?
Thank you
Andrea
Addendum :
As per G0HZU suggestion, I decided to add this Limiter
http://194.75.38.69/pdfs/VLM-33W-2W+.pdf to the setup....according to the specs, a MAX 14.49 dBm should be the output when +33 dBm are applied in the input.
Any idea how the limiter will behave for inputs below +12 dBm ?