I now have a functioning portable set up. The antenna is a Watson Multi-Ranger-9, which sits on my triple mag mount. It covers 80, 40, 20, 15, 10, 6, 2, and 70cm and also receives on airband. Tuning is via a jumper cable in the coil and adjusting the length of the resonator. A quick test in the car gave promising results. I'm fortunate in that I have an LDG AT-897 auto tuner attached to the FT-897 and tuning on 40, 20 and 6 meters is a breeze. I'm not expecting earth shattering performance from a whip on a magmount but at least it will get me on the air and out of the house. I also have an Ampro whip for 40m so I have some options.
I also have the end fed wire and an 11 metre long fishing pole so there's even more flexibility. I have bought a 12 Volt car battery boost starter (essentially a battery in a case with jump leads and a cigar lighter socket attached) to either power the radio or jump start the car once I've flattened the battery.
I have relinquished the 70cm Gateway and have applied for a 2m allocation in its place, due to myself and immediate neighbours experiencing issues with interference to car remote locking fobs. My Gateway frequency is/was 430.500 MHz, which is also channel 40 on the LPD band. As Amateurs and LPD users are secondary users of the 70cm band (the MoD being primary users) and as I live within the confines of an active RAF Base, I thought it prudent to make the change. I have conducted limited testing on 2m with the AllStar node and it seems to be stable, without interference issues. I'm just waiting for the NoV to be issued, it has been passed by Ofcom so I just need the NoV document to make it all above board.
I'm out and about over the next couple of days - working HF from the car, and I'm looking forward to the experience. I have a number of locations earmarked but if the weather isn't too bad I might just have a ride up the East Coast to the Mablethorpe area, near the salt water, and try some 6m activity.
73 for now, de 2E0ENN