As a back up transceiver it is again adequate. Because it is built cheaply it is much more prone to RFI, and adjacent channel interference. I would use AM air frequencies far more than FM broadcast. The radio is a small size similar to VX-5R. But a quick review of the Advanced Manual quickly corrected that. Had more problem ensuring proper TONE transmit and receive frequency as this is done a little differently than some radios. If want Automatic Repeat Shift after inputing simplex have to revert ARS back to ON. Have set my cross band repeat frequency as 446.xxx with no problem. Just place RPT.ARS and RPT.SFT for inputing simplex frequencies in the 446-447 range. Simplex can be set on 446 and adequate transceiver.įirst I will reply about the previous comment on offset on UHF frequencies in the 446 range not being able to retain simplex. Unfortunately, as far as I can tell, there is no way to update the firmware on the FT-4X, assuming Yeasu would ever release new firmware to fix it. So it would appear that there are plenty of options to get the mic gain right and that the mic gain deficiency is down to the firmware in the GD32F101CBT6 MCU. This is in addition to the deviation setting. Update: I checked the programming guide for the RDA1846S and it has registers to set "Voice analog gain", "Voice digital gain" and "Voice digital gain after tx ADC down sample". Since it is a digital radio I guess the fault is with the RDA1846S which should be processing the audio better but if Yeasu wanted to beat the Beofeng and other radios using this chip they could have included a transistor or op-amp audio pre-amp.Īs soon as the warranty expires, I'll fix it myself. The circuit shows that the mic signal path goes unamplified into the RDA1846S chip. I tried getting the Yeasu handset mic but it sounds just the same. Just like in the early days of wax cylinders it was necessary to shout very loudly to make any impression at all, so it is necessary to shout directly into the mic to be heard at all. I like everything about this portable except the TX audio level. Size: 2.1 x 3.5 x 1.2 inches (less knobs and The new FT-4XR meets demanding commercial grade (BLCO), Automatic Power Off feature and Transmitter Time Out System (ARTS), CTCSS/DCS Operation, Busy Channel Lockout Transceiver-to-Transceiver Cloning (optional cable), KeypadĮntry, FM Broadcast Receiver, Automatic Range Transponder “Severe Weather” Alert, PC Programming (optional cable), Operation is available with the optional SSM-512B earpiece The SBH-22 3.5-hour rapid charger is included. Hours operation (TX 5 seconds, RX 5 seconds, Standby 90 Supplied 1750mAh Li-ion battery pack is capable of up to 15 Provides a full 1 Watt of powerful, clear audio. The FT-4XR isĬompact and light, yet ruggedly constructed. Levels: 5, 2.5 or 0.5 watts transmitting from 144 to 148 The FT-4XR 2 meter/ 440 MHz HT has three output power Review Summary For : YAESU FT-4XR – VHF/UHF Dual Band FM Handheld Transceiver EMail SubscriptionRegistered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted.
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