The AM1620 side is the Radio Systems, I Am Radio, (Updated Talking House.), and the ATU (Antenna Tuning Unit.), is mounted up at the eves. I bought the thing in 2010 when it was around $400.00 at the time. The actual TX is pumping out the massive 92mW PEP from a floor rack. The GND'ing? Old outer braid RG-8 coax to an 8ft GND rod. No array below. (The manual actually tells you to ground for lightning protection.) I added a Gas Discharge Tube to aid in protection. (Albeit, I know that it will not take a direct hit, but what will?) Heck, see it all for yourself,
https://vk.com/realfreeradio (I purposely do not use facebook and Twitter, and 4 years ago Just-In Timberlake wiped everyone's myspace. So, VK.) Anyway, the top has the PIC's of a ragtag studios, the carrier-current station AM610, the rack with the AM1620 TX, then the ATU, and the newer AM1620 copper 9ft antenna. Range? Varies, a lot. Winter time I've heard it in a parking lot over 3 miles away, albeit any noise would obliterate it. The good range towards the northern field (Very clear.) is heard over a mile driving, in the day. In November 2017, the CB whip was swapped for the 5/8th" copper pipe, with capacitive Tophat. Boomer calculated that my range could be +6% better, and I think he's right on the money. (Will the listeners notice? Doubt it.) Nighttime? Maybe 1/2 a mile over Cuba and South Bend, IN stations. (BTW, AM610 feeds audio to AM1620 in the garage.) How does it all work? Most of the time, very reliably. However, as you can see from my PIC, not the neatest installations. (Just like a real AM station!) However, PIC's of other Part #15 stations on ALPB and Part15.us sites put me to shame, but will AM C-QUAM stereo be in my future? Lookin' at it!