That might work, but the VHF port of the second UVSJ would need to be power passive for the preamp. The Radio Shack and Antennas Direct UVSJs are power passive on the UHF port, not the VHF port.
https://mjsales.net/products/tru-spe...ant=1198505857
Code:
UHF> Jumper> UHF
/ \
7698> UVSJ UVSJ> coax> grounding> power> tuner
\ / block inserter
VHF> Preamp> VHF
Another possible solution is to attenuate the UHF and amplify both. The attenuator value would be selected by trial and error. Too much attenuation would make WXEL 27 too weak; not enough attenuation would cause overload from 16 and 34. I suggest 15 dB as a starting point to make it as weak as the VHF channels before amplification.
Code:
UHF> Attenuator> UHF
/ \
7698> UVSJ UVSJ> preamp> coax> grounding> power> attenuator> tuner
\ / block inserter
VHF> FM Filter > VHF
You might also need an FM filter between the VHF port of the first UVSJ and the VHF port of the second UVSJ. You have a strong FM signal coming from the south.
http://www.fmfool.com/modeling/tmp/f...a/Radar-FM.png
I suggest a HLSJ, High and Line ports, as an FM filter and an Antennas Direct Juice preamp because it is resistant to overload.
http://www.solidsignal.com/pview.asp?p=zhlsj
You might need some attenuation after the preamp power inserter to prevent tuner overload. The signal dynamic range between CH 16 and CH 12 will be about 36 dB, for a required SFDR (Spurious-Free Dynamic Range) of 52 dB after adding the minimum required SNR of 16 dB for CH 12.