do you consider the trx better at uhf dmr then ?
Not that it's better, but when I am out and about and monitoring with both radios (sds & trx) I use the SDS for the simulcast in my area and the TRX for everything else. The SDS is definitely better deciphering LSM and P25, so that is what I use it for at all times. I have switched the roles with the radios and I quickly switch back. The TRX is not bad on my local LSM system (Ohio MARCS P25), but the SDS blows it out of the water in that regard. But, to answer your question and compare uhf dmr reception, I would say they are neck and neck when I do scan that band with the SDS. Both do pretty well. I think the SDS with the Remtronix antenna pulls in the farthest signals over the TRX with the same antenna.
But, I must be in THEE sweet spot here for base station reception. I am about a mile from the main gate at Wright-Patterson AFB, 1/4 mi from I-675, 4 miles from the MARCS towers at the Nutter Center, and I can throw a rock from my back door and hit the closest cell phone tower. The Air Force relay towers are just beyond that. I should be overwhelmed with intermod, interference, front end overload, overmodulation and everything you can imagine, but I am not. I have a directional yagi 25-ft high at the apex of the roof along with a Diamond discone five feet above that, things split up evenly with 2 Stridsberg multi-couplers, my 536, TRX-1 and SDS100 on the yagi. I have zippo problems with vhf reception on my SDS, pulling in signals loud and clear from downtown Dayton, Springfield in Clark county, and some Preble county (faintly).
Actually very happy with both the SDS100 and the TRX-1, and they work well together for me on the go as well. I don't have a permanent antenna install in my vehicles for scanners, so I use a pair of BNC window clip mounts with their respective duckies - a Remtronix on the SDS and a Watson W-889 telescopic angled antenna on the TRX. I have several counties on the Ohio MARCS P25 system programmed into the SDS and TRX and I always utilize the SDS100 to bring up neighboring counties such as Clark/Miami/Montgomery. I will use the TRX to listen to Germantown on the Montgomery County MARCS system while listening to the Greene county system on the SDS (nephew is LE in Gtown) and the TRX handles that ok, just listening to the south dispatcher. But when mobile I usually use the SDS to monitor the Ohio MARCS p25 Greene/Montgomery systems, the TRX for Germantown and all other freqs. They do a fantastic job on all systems.
JD
kf4anc