[Ronja] Spectral analyzer up to 8 GHz

[Karel Kulhavy]

Due to low achievable gain I had to upgrade the 2N3904 in the design (Ft=300 MHz)
to BFR90/91/91A (5GHz). 2N3904 oscillated at 500 MHz so I expect these to oscillate at
8GHz. Does anyone has a spectral analyzer like this or a scanner (communications
receiver)? When I build the limiting amplifier cell I have to check it doesn't
oscillate.

Or do you know any technique how to check for oscillation without such high frequency instruments?

Karel