Yaesu FT890 calibration - UK Vintage Radio Repair and Restoration Discussion Forum

GSBX1220 · 20th Feb 2019, 4:24 pm

Hi folks

Maybe a silly question. The ALC meter cal was out on my rig. No matter how high I adjust the mic gain, the meter hardly deflected. As a result, I set mic gain by peaking the rf output power on voice peaks.

The manual, pics attached, states a cal procedure ( ALC meter sensitivity) which involves using an af sig gen. I have done this procedure and the ALC meter deflection now tracks the mic gain settings better.

My question is regarding the procedure in the manual. The manual does not state if the sig gen output should be peak to peak or RMS. I done the cal with peak to peak as that's what my Farnell gen is calibrated in.

Anyone know if I have done this cal correctly?

20th Feb 2019, 4:24 pm	#1
GSBX1220 Pentode Join Date: Jun 2018 Location: Glasgow, Scotland,UK. Posts: 127	Yaesu FT890 calibration Hi folks Maybe a silly question. The ALC meter cal was out on my rig. No matter how high I adjust the mic gain, the meter hardly deflected. As a result, I set mic gain by peaking the rf output power on voice peaks. The manual, pics attached, states a cal procedure ( ALC meter sensitivity) which involves using an af sig gen. I have done this procedure and the ALC meter deflection now tracks the mic gain settings better. My question is regarding the procedure in the manual. The manual does not state if the sig gen output should be peak to peak or RMS. I done the cal with peak to peak as that's what my Farnell gen is calibrated in. Anyone know if I have done this cal correctly? Attached Thumbnails __________________ Richard