SmartSDR on large screen 4K TV in "PC Mode " ?

HI Andy… it depends on how you're planning to hook to the TV. I don't have a Maestro or one of the units with an HDMI output, so I can't help you there.

I can tell you that I run two (2) 4k monitors attached to my Windows 11 PC and I can run SmartSDR on either one of them very successfully. It's great having the expanded band span of a wide monitor (both are approx 27in models). I even suppose that with proper configuration of the displays, I could have SmartSDR running across both monitors combined! :-)

Anyway, I keep it to one for now with Log4OM running below it, while the other runs web-browser look ups, like QRZ.com, POTA, SOTA, etc.

For me the "sweet spot" is achieved by aligning the TV so my eyes are level at the center of the bottom edge of the top third of the screen and no lower than the dead center of the screen. This helps minimize eye and head movement and thusly reduce eye and neck strain. Also, I use a tilt-back office chair, which helps avoid neck strain when working hours at a time.

It will be difficult to achieve an ideal viewing positon with a 65" screen and may require increasing your chair height substanially and possibly adding a footrest to compensate, depending on your stature. The bottom of the screen should be positioned as close as possible to desktop level. You will probably find that stitting four feet from the screen will provide the best compromise.

Alternatively, if you have sufficient space behind your desktop, mounting the TV on a rolling and adjustable stand would allow you set the ideal height and move it farther away to comfortably watch regular entertainment content. Below is a Gemini 3 AI analysis (I know — be careful), which comports with similar recommendations on A/V websites. Note that you will want to increase Windows scaling (mine is set to 150%):

For a 65-inch 4K display used as a computer monitor, the ideal viewing distance for reading text comfortably while maintaining productivity is approximately 4 to 6 feet (1.2 to 1.8 meters), or roughly 48–72 inches. 

While some television-focused, high-immersion recommendations suggest a closer 6.5 feet, text readability at that size requires a balance to avoid eye fatigue and excessive head movement. 

Optimal Distance Breakdown

• Optimal for Reading & Work (4-6 ft): This range allows you to see the entire screen without excessive head movement while keeping text clear and crisp.
• For Immersive Use (6-8 ft): If you are using it primarily for movies or gaming, 6.5–8.9 feet is considered ideal for a 4K 65-inch screen to maximize immersion without being able to see individual pixels.

• Tips for 65-inch Monitor Usage
• Scaling and Resolution: Because a 65-inch panel has a massive area, you should use 4K resolution at 100% scaling if sitting 5-6 feet away, or scale up to 125%–150% if you prefer to sit slightly closer to maintain readability of small text.
• Eye Level: Position the screen so your eyes are level with the top third of the display to avoid neck strain.
• Reduce Eye Strain: Use the 20-20-20 rule: Every 20 minutes, look at something 20 feet away for 20 seconds.

73,

Larry KB1VFU