02-04-2012, 02:39 PM
Hello Ron
Continuing to try to analyze the low reception on some weaker stations, I measured the resistance of the antenna coil at the coil lugs themselves, which is about 10.7 ohms. The other side of the coil measured 6.8 ohms. Is this too high? Was under the impression that they should be about 3 ohms.
Reception improved almost 10 fold when I put the antenna lead on the grid of the RF, with no distortion throughout the dial, and with the volume control working perfectly. I'm not really comfortable removing the coil and was thinking of leaving the antenna lead hook up at the RF grid.
Any harm in doing this? The 90 has been playing set up with antenna to grid for 6 hours now with no ill effects, and the number of stations received like this is unbelievable!
Thanks for your thoughts or opinion on this. Joe
Continuing to try to analyze the low reception on some weaker stations, I measured the resistance of the antenna coil at the coil lugs themselves, which is about 10.7 ohms. The other side of the coil measured 6.8 ohms. Is this too high? Was under the impression that they should be about 3 ohms.
Reception improved almost 10 fold when I put the antenna lead on the grid of the RF, with no distortion throughout the dial, and with the volume control working perfectly. I'm not really comfortable removing the coil and was thinking of leaving the antenna lead hook up at the RF grid.
Any harm in doing this? The 90 has been playing set up with antenna to grid for 6 hours now with no ill effects, and the number of stations received like this is unbelievable!
Thanks for your thoughts or opinion on this. Joe
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