Yaesu FT-991 Two Tone Test

The following images depict the results of a two tone test I ran on the repaired FT-991.  The rear data port was used to inject the signal from a PC running SpectrumLab. Tones where set to 1000Hz and 1575Hz respectively. The RF out of the Yaesu FT-991 was fed into the SM-220.
This image shows the transmitter flat topping, settings where 100W and ALC  increased slightly to peak RF output (a few bars visible).  The maximum output power achieved and observed on the external power meter was 90W (10% accuracy at full scale). Flat topping is a symptom of the PA being over-driven.

With reduced ALC, i.e. no visible ALC indication in fact one step (click) below zero observable ALC and with the FT-991 set to 100W, the following output was observed.

Yaesu FT-991 Programming the Memory Channels

Yaesu FT-991 - Programming the Memory Channels
Talks us through how to program and access the user memory channels of the Yaesu FT-991 transceiver.

Yaesu-FT-991 Memory Recall

[Yaesu-FT-991] Memory Recall

I'm sure I'm missing something in the manual. I have programmed some memories with no problem. When I try to recall a memory, I hit the MCH softkey and nothing happens when I turn the multi knob. I can see the list of memory channels, but I can't recall one. Otherwise, I'm really enjoying my new FT991.

When I have the normal Frequency and S-Meter up on the FT-991 TFT screen, I just hit the V/M button and the rig goes the the last memory channel I last used. Then just use the MULTI knob to scroll through the memory channels. 

Press the M/V button to be in memory mode, MEM ## in upper left of touch screen. Touch the MCH touch key. Rotate the Multi knob and memories will scroll thru the frequency window, MEM # changing.
You cannot recall memories when screen shows the Grey memory list.

To recall memories you press the V/M button. To change from memory channel to memory channel, you press the MCH Icon on the screen, then rotate the MULTI knob.

FT-991 Software Update and Version Identification

FT991 Confirm the Firmware Version


Press and hold the [POWER] key to turn on the transceiver, while pressing and holding the [A=B] key, and [A/B] key on the transceiver's main panel.
The versions of each firmware will be displayed on the TFT screen.

Before installing new firmware, please verify your current version firmware with the following procedure:

Download the FT-991 data and [FT-991_Firmware_Update_AUG25.zip] from the following website: