Z-817 mod

I live in a suburban area, where no antennas allowed. I need to go stealth, just under the radar.
I mainly work from the park, or hilltops, but sometimes it is good to make few contacts from home too.
Small vertical can help a lot, but on the lower bands it is not so effective.
I recently got a Z-817 from LDG. I had it before and liked it so much. It is an L match tuner, works up to 600ohms. In fact it is only effective up to 300ohm. Of course it works in the range of high impedance, but only with compromises.

My mod helps it to be a bit better.

I installed a 1-4 and 1-9 un-un into the box. They are selectable with the two switches on the back board.

The difference can be several dB on the field meter.

I also changed the GND connector, because I use banana plugs.
There is an RCA connector for remote and a switch to prevent it to drain the batteries in the backpack.

The transformer is a standard one with 42 material core.