Unlike other eye tubes 6AF6G doesn't have a amplifier built in. It depends on voltage being higher on RF & IF tubes as strong stations are tuned in.
You may not get it to close completely but movement will improve as the radio is aligned and used with a good antenna. If the eye is always closed the RF & IF tubes may be weak and not drawing enough current.
Norm
: Hi guys, I really enjoy reading your posts and I feel like I'm learning a thing or two. I have a Stromberg Carlson 420 table top radio that works well. When I got the set, the 6AF6G tuning indicator filament was burned out and I just recently found a replacement. I have observed that during use, it is almost completely lit-up across the band and only makes minor movements when I approach a strong signal. Is this an indication of a problem with the voltages in the set? The tube lineup is 6A8, 6K7, 6H6, 6SQ7, 6F6, 6AF6G, and 80.
: Thanks for your inputs!