Some years ago, thanks to some loaned equipment from my friends Bob G8DTF and Dave G4MVU from the Bolton Wireless Club I made some contacts on the 9cm band.
Initially I was using Bob's downconverter (with a 144MHz IF) and his varactor-multiplier transmitter with my own SNA586 MMIC as a "PA" - but the x8 frequency multiplication (from 425MHz) meant that we were limited to "not-so-narrowand FM".
Then Dave loaned me one of his linear transverter systems, in which he'd converted a couple of AirSpan AS4000 WLL units to use a 23cm IF, which enabled us to make clear SSB contacts from Winter Hill down to his QTH.
I was so impressed with this that I built a similar system for myself. But I used an IF of 880MHz (very close to the 850MHz originally used in the AS4000), which saved me having to change the VCO inside the unit - although I had to make a crude 880MHz "transverter" to go along with my 2m transceiver.
Here are some pictures of the project in progress:
I field-tested this during the August 2012 SHF UKAC session: my first QSO was appropriately enough with Dave G4MVU and signals were S9+20dB both ways.
Then after using it portable over the summer of 2013, I passed it onto Mark M0UFC to use in the SHF UKACs; he uses it with his FT817 rather than my IC202.
Then in 2017 I bought one of the new generation of C-band LNBs with a PLL oscillator. This downconverts 3400MHz to a "negative IF" (i.e. frequency-reversed) around 1750MHz, which can be tuned with a FunCube Dongle or RTL-SDR.
With this bolted onto my mast, despite an obstructed view to the South I was still able to detect the GB3ZME beacon on 3400.91MHz from Shropshire. My waterfall display shows the two frequencies of the beacon's FSK signalling, along with a slow HF frequency drift caused by my LO heating up and a more rapid LF shift due to the Doppler-shift from an aircraft reflection.
I'd set the "Swap I & Q" option in HDSDR to compensate for the "negative IF": therefore frequency increases from left to right on my display, and I can receive USB signals on "USB".
My original tests used the supplied "flat scalar" flange around the LNB, which is designed to provide a wide beamwidth to illuminate a prime-focus dish. However I've now built a crude conical horn to give better directivity (folded from 0.5mm sheet aluminium and secured in place by a pipe-clip).
I've fastened it higher up on my mast too, so now the beacon is clearly visible all the time, in brighter colours on my waterfall display - and I can even hear it through the laptop speaker!