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 Post subject: Silvertone 6120 Eye Tube
PostPosted: Feb Thu 08, 2018 3:10 pm 
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Joined: Jun Mon 01, 2015 9:34 pm
Posts: 877
Location: Greenville, TX
I am using a 6E5 which is more sensitive than the 6U5. How do I reduce the sensitivity. Currently it overlaps on most signals.

http://www.nostalgiaair.org/pagesbymode ... 017377.pdf

Thank you,

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Dale

http://www.dalesantiqueradio.com/


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 Post subject: Re: Silvertone 6120 Eye Tube
PostPosted: Feb Thu 08, 2018 3:21 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 37034
Location: Livermore, CA
Dale

Reduce voltage going to pin #3, grid. Add a large value resistor in series with wire going to this pin. Connect another large value resistor from pin #3 to cathode, pin #5. This makes a voltage divider. I would start with 4.7 or 10 meg resistors. Using much lower values will load down the AVC line.

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 Post subject: Re: Silvertone 6120 Eye Tube
PostPosted: Feb Thu 08, 2018 10:50 pm 
Member

Joined: Jun Mon 01, 2015 9:34 pm
Posts: 877
Location: Greenville, TX
Thanks Norm. I checked and found the sensitivity of the 6U5 to be 1/3 of the 6E5, so I used 4.7M to ground and 10M in series with pin3 resulting in a 30% voltage divider. Results are perfect.

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Dale

http://www.dalesantiqueradio.com/


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