[jrgagne99]

Due to the height of the corner reflectors on the HDB91X, the closest I could space them was about 25". It made maybe a 1 dB improvement in SNR on some channels. Others were unchanged. WFFF might have gone up by 1 dB. Without more sophisticated measurement equipment it is difficult to quantify, especially because in deep-fringe, the SNRs bounce around by 1-2 dB constantly. Even looking at the high-water mark over 30-second intervals, that measurement itself can change by 2-3 dB over a 10-minute period. So it can be difficult to tease out whether the effect is mechanical or temporal.
Multiple repeat measurements at different times of the day are needed to have a better chance at understanding the true impact.

To join the signals, I'm using coax cables of the same length (within 1/4 inch or so), and a combiner scavenged from my HDB8X 8-bay. I'm worried that the combiner losses might be swamping any stacking gains. Can anyone recommend a ultra-low loss combiner I should try?