That required you to stop your vehicle, change the resonator or coil, and retune the antenna every time you wanted to listen or operate on a different frequency band. Discovering this hassle; my wife Lillian, encouraged me to develop an antenna to eliminate these problems and enhance the advantages of the new transceivers. Instead of a single resonator with a telescoping whip, the Spider Antenna uses four (or as many as seven) resonators (one for each frequency band) with adjustable tuning sleeves. The resonator size and configuration were developed so there isn't a detuning interaction between the resonators.
The tuning sleeve and the Spider Antenna are both patented by me, Clarence Fredrick Shmitka, with the U. The antenna is no longer in production which would put this into the "rare and hard to find" category. The only moving part is the sliding tuning sleeve and they seem to be well built so probably no much to go wrong with it!Seems to be in ideal antenna for a mobile rig, marine, or even if you live in a condo or house with highly restrictive rules on antennas. Other than some typical light scuffs, the antenna appears to be in great condition. Minor sun fadeing on a few. The item "SPIDER Antenna HF Ham Radio 10, 15, 20, 20, 40, 75 Meter Mobile + extension" is in sale since Saturday, September 10, 2016. This item is in the category "Consumer Electronics\Radio Communication\Antennas\Ham, Amateur Radio Antennas".
The seller is "rob151boats" and is located in Wenatchee, Washington. This item can be shipped to United States, to Canada, to United Kingdom, DK, RO, SK, BG, CZ, FI, HU, LV, LT, MT, EE, to Australia, GR, PT, CY, SI, to Japan, to China, SE, KR, ID, to Taiwan, to Belgium, to France, to Hong Kong, to Ireland, to Netherlands, PL, to Spain, to Italy, to Germany, to Austria, RU, IL, to New Zealand, PH, SG, to Switzerland, NO, SA, UA, AE, QA, KW, BH, HR.