Hi! In the past year or so, Yaesu has introduced a pair of new FM-only dual-band HTs - initially the FT-65R, followed by the FT-4XR. With these two HTs, Yaesu now has 5 dual-band HTs in its current lineup (along with the FT-60R, FT-70DR, and FT-2DR). These HTs may be different physically (the FT-65R is larger), but their internals are similar. They also use an SMA male connector for the antenna, similar to other Chinese-made HTs. The speaker/mic connection is similar to low-end Motorola HTs, and not compatible with other two-pin speaker/mics normally used with many amateur HTs. I wanted to see if either - or both - of these radios could be used to work satellites, and try to dispel some myths along the way. The following outlines what I found when I took a closer look at these two radios... Time to get the first question I write in these reviews: can the FT-65R or FT-4XR work FM satellites full-duplex? The simple answer, for both radios: No. For full-duplex operation in one HT currently in production, you still need to look to the Kenwood TH-D72, or for the U/V FM satellites like the AMSAT Fox-1 series the Wouxun KG-UV9D or KG-UV9D Plus are options. Wouxun's KG-UV8D HTs (and variants) are also capable of working the U/V FM satellites full-duplex, but the receiver in the KG-UV9D series HTs is far better and cleaner than the receiver in the KG-UV8D series HTs. I have written more about the TH-D72, KG-UV9D, and KG-UV9D Plus in other threads on this forum. Physically, the FT-65R is slightly larger than the FT-4XR, and both are smaller than Yaesu's FT-60R. The FT-4XR is almost the same size as the Baofeng UV-5R HTs with their standard battery packs. The FT-65R and FT-4XR both use lithium-ion battery packs - the SBR-25LI pack for the FT-65R is a 7.4V/1950mAh pack, and the SBR-28LI pack for the FT-4XR is a 7.4V/1750mAh pack. These packs use the same charging cradle and wall-wart adapter, which are also capable of charging the battery packs used with the Baofeng UV-5R HTs. Both radios have 200 normal memory channels, 3 home channels (one each for 2m, 70cm, and the FM broadcast band), 10 pairs of memory channels used for scanning, and the 10 frequencies used by the weather radio services in the USA and Canada around 161-163 MHz. The FT-65R and FT-4XR are direct-conversion radios, similar in design to the Baofeng and Wouxun HTs. The FT-65R has a monochrome dot-matrix LCD display capable of displaying two frequencies or channels, and the FT-4XR has a multi-segment LCD display showing one frequency/channel at a time. You can see internal photos of an FT-4XE (the European version of the FT-4XR sold in North America and other parts of the world) in this review by Razvan YO9IRF/M0HZH: https://qrpblog.com/2018/09/yaesu-ft-4x-review-it-is-after-all-a-baofeng/ The RDA1846S illustrated at that link is an "FM transceiver on a chip" used in many of the Chinese-made HTs like the Baofengs. This chip is capable of operating on 3 different bands (134-174 MHz, 200-260 MHz, 400-520 MHz). The RDA5802N is an "broadcast FM receiver on a chip", for the 65-108 MHz coverage in these radios. A look at the specifications of the 3 FM-only HTs currently in Yaesu's lineup - the FT-65R, FT-4XR, and the venerable FT-60R - shows that these radios are more similar to each other than you might think. Sensitivity is marginally better on the FT-60R for the 2m amateur band, and the same on these 3 radios for the 70cm amateur band, according to Yaesu. Selectivity is identical on these radios, along with other specifications on that chart. It helps to actually look at the specifications for these HTs, and not rely solely on tired statements about the perceived superiority of one radio over others. Even though the FT-65R and FT-4XR have the same numbers and types of memory channels, the memory channels do not function in the same manner with these radios. The memory channels in the FT-65R can store the receive frequency, along with the size and direction of the offset - provided the offset value keeps the transmit frequency in the same band as the receive frequency. This is a problem for working FM satellites, as this means you will have to use the two VFOs to work satellites (explained in the FT-65R's Advance Manual). This is cumbersome. On the other hand, the FT-4XR's memories allow for separate receive and transmit frequencies, where these frequencies are in different bands. The FT-4XR can be programmed to work FM satellites like many other dual-band HTs half-duplex, using groups of memory channels. Make sure to download the FT-4XR's "Advance Manual" PDF from the Yaesu web site, as the instructions for programming "split memories" aren't in the printed Operating Manual supplied with the FT-4XR. Yaesu has made free programming software available for these radios, along with Yaesu's 2m-only FM HTs that came out with these dual-band HTs (FT-25R and FT-4VR). This is a departure from Yaesu's past, where programming software for Yaesu radios was generally left to RT Systems. The Yaesu software requires an SCU-35 cable that is compatible with these newer HTs, priced around $20. The download for the Yaesu programming software includes the Prolific driver for the SCU-35 cable. If you prefer, RT Systems has a software/cable package for these HTs. I have found my KENMAX 6-in-1 programming cable I ordered from Amazon a while back: https://www.amazon.com/gp/product/B01466PL7U/ has a pigtail that works with these Yaesu HTs. Like with the SCU-35 cable, the KENMAX cable - which appears to be similar to other 6-in-1 cables available from Amazon and other online sources - uses a Prolific chipset. The KENMAX cable came with a small CD with drivers for a variety of Windows operating systems and other software. I found that the driver for Yaesu's SCU-35 cable also supports the KENMAX cable, so I didn't need to install a driver from that CD. I use the M pigtail which has a 3-conductor 2.5mm plug to go into the microphone jack on the FT-65R and FT-4XR. I also use the KENMAX cable with other radios, either on my Windows systems (Windows 7 laptop, Windows 10 tablet) or my Linux (Fedora 28) laptop. For on-the-air testing working FM satellite passes, I will continue only with the FT-4XR. Someone wanting to get started with FM satellites might not be happy with the work needed to use an FT-65R on the satellites by itself. Full-duplex operation is ideal, of course. The FT-4XR can be used by itself to work satellites half-duplex, with groups of memory channels. The FT-65R and FT-4XR can be used as one radio in a two-radio setup to work the FM satellites full-duplex. The FT-4XR does not have a VFO knob on it. In fact the only knob is a volume knob which is also the power switch. The up/down keys on the keypad are used to change frequencies in the VFOs, or to change memories when in memory mode. I did not try working AO-85 with the FT-4XR, but was able to work the other 3 FM satellites (AO-91, AO-92, and SO-50) with the FT-4XR. Most of the time, I used my Elk dual-band log periodic with the FT-4XR, but I did work one AO-92 pass with an MFJ-1717 2m/70cm whip instead of the Elk. I had to twist my antenna to stay aligned with the satellite downlinks with a little more precision than I would with other radios, but the FT-4XR was up to the task. I received good reports on my transmitted audio through the satellites, and didn't think the receiver's front-end had sharper filtering like with some of the Chinese-made radios. In other words, not having a 2.5 kHz tuning step caused no problems for me with the FT-4XR. Recordings I made from passes I worked are available in the "FT-4XR" folder at my http://dropbox.wd9ewk.net/ space. I also used the FT-4XR and an MFJ-1717 2m/70cm whip to listen to a couple of passes, which have been turned into YouTube videos. This is the video of an AO-91 pass I heard with this combination on 15 July: and an AO-92 pass on 23 July: I could tell that the FT-4XR's 2m receiver wasn't as sensitive as other HTs. With a gain antenna, it worked OK for the FM satellite downlinks, but might take a little more effort on lower passes. Yaesu has followed Alinco to China for manufacturing of these radios, and it appears there is acceptable quality control in the factory where the FT-65R and FT-4XR are made. Yaesu now offers a 3-year warranty on their radios sold in the USA, including these new HTs. With Yaesu, service on these radios - if ever needed - should be easier to obtain than service on radios from Baofeng and other Chinese manufacturers. Accessories for the FT-65R and FT-4XR are also priced less than comparable accessories for other Yaesu HTs, except for the RT Systems programming kits. These radios fill a niche in the market - priced higher than Baofeng and similar Chinese-made HTs, but less than other FM-only HTs from Yaesu (also Icom and Kenwood) with more features or better performance. You get what you pay for, of course, and you get acceptable performance with these Yaesu dual-band HTs. In summary... there are better radios that can be used to work FM satellites. You will need to spend more than $100 or so to get them. You can get acceptable performance from Yaesu's FT-4XR priced around $100, and be able to work FM satellites using groups of memory channels. The FT-65R is a slightly-larger HT that is around $15 to $30 more than an FT-4XR, but you will need to use the two VFOs to work FM satellites with an FT-65R. Or add a second radio to either an FT-65R or FT-4XR, and work FM satellites full-duplex.