- Transmit power
- Yaesu rates it at 5 to 100 W on HF and 6 m and 2 to 50 W on 2 m and 70 cm, with AM at 25 W and 12 W. Ask for a wattmeter reading into a dummy load on an HF band, 6 m, 2 m and 70 cm, using the right antenna jack for each. Full power on all four proves both power amplifiers.
- Receiver
- It receives 30 kHz to 56 MHz, 118 to 164 MHz and 420 to 470 MHz. Ask for a video of the scope and audio on several HF bands, 6 m and a 2 m or 70 cm signal. A band that shows nothing while the others work points at a fault on that path.
- Finals
- Yaesu uses a push-pull pair of RD100HHF1 MOSFETs for HF and 6 m and an RD70HUF2 for 2 m and 70 cm. Its service manual warns a final can break if the radio transmits with the J1006 plug left off during alignment, so ask whether it has been opened or realigned.
- Power supply
- It needs 13.8 V DC ±15% at 23 A or more. Yaesu's matching supplies are the FP-1030A (25 A) and, in the USA only, the FP-1023A (23 A). It came with a DC power cord and a spare 25 A fuse.
- Dial and display
- The 3.5-inch color touch screen carries the scope, waterfall and menus. Ask for a photo of it on with the waterfall running, and a video of the main dial. Yaesu's 2024 firmware is MAIN version 02-07, so ask for the version shown in the menu.
- Filters and options
- The tuner, TCXO and DSP are built in, so there are no internal options to look for. The tuner works on HF and 6 m only, matching 16.7 to 150 ohms on HF and 25 to 100 ohms on 6 m. An FC-40 external tuner or an ATAS-120A antenna are the add-ons you'll see in listings.
Check the listing photos against this list, and ask the seller about anything you can’t see. A missing piece should come off the price.