Hello all
I have four full cband lnbs (3.4GHz to 4.2GHz) for sell.
1. Kaonsat Premium KS-N201G Single F2. This one of my best cband lnb. Never opened, added black silicone to avoid water inside lnb.Sun burned out a red "premium" sign from a sticker SOLD
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2. Kaonsat KS-N201G Single, also good and almost new not used. This lnb have DiSEqC switch inside, using 22khz signal.
You can connect second lnb for R/L to "LNB" port and use RCV to connect receiver. Some bird tore off the sticker with info...
3. ZINWELL ZCF-D21A I didn't have time to test this converter.
4. Panorama 13K very good and known lnb. In rare cases it beat Kaonsat Premium KS-N201G Single F2.
Here also bird tore off the sticker with detail info.
sells with sadness.
A nearby terrestrial 5G transmitter causes very strong interference across the entire band.
The crazyscan graph reaches +9dBm or even more in spikes.
Maybe someone without interferences will be happy using those lnbs. 
If you are interested ask via pm.
Best regards