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 Post subject: Need sub help- again
PostPosted: Mar Wed 14, 2018 3:39 pm 
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Joined: Feb Sat 28, 2015 10:50 pm
Posts: 461
Location: Decatur Alabama
I just acquired a Silvertone 4485 that has a 6N6 as an output tube. What, if any, tube can I use as a substitute?


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 Post subject: Re: Need sub help- again
PostPosted: Mar Wed 14, 2018 3:46 pm 
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Joined: Jul Sun 09, 2006 3:11 am
Posts: 5626
Location: Aurora, CO
A quick search of Ebay turns up many 6N6G tubes. No need for a sub.

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 Post subject: Re: Need sub help- again
PostPosted: Mar Wed 14, 2018 4:00 pm 
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Joined: Feb Sat 28, 2015 10:50 pm
Posts: 461
Location: Decatur Alabama
Well, I can get one from my radio club on Saturday. I was just working on it today and wanted to see if there was a possibility of getting it to play.


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 Post subject: Re: Need sub help- again
PostPosted: Mar Wed 14, 2018 4:27 pm 
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Joined: Jul Sun 09, 2006 3:11 am
Posts: 5626
Location: Aurora, CO
6AB6G

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 Post subject: Re: Need sub help- again
PostPosted: Mar Wed 14, 2018 6:28 pm 
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Joined: Jul Mon 26, 2010 8:30 pm
Posts: 23352
Location: Annapolis, MD
One good place for subs:
http://www.nj7p.org/Tubes/SQL/Tube_query.php?Type=6N6G

Note that I had to enter 6N6G

Don't spend a lot of calories on this--Bob Dobush has 6N6s for $7 used / $12 new. (6AB6 is a different story--2 of my suppliers don't list it--I found one new one for $35)

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"It's always something". --Gilda Radner (1946 - 1989)


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 Post subject: Re: Need sub help- again
PostPosted: Mar Wed 14, 2018 6:34 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 36878
Location: Livermore, CA
Use 6V6, 6K6 or 6F6 tubes. When you do this lift connection to pin #8 and add a 470 ohm resistor in series with this wire. Best if you also connect a 10 - 25mf @ 50 volt cap across the resistor. You can use the radio with any of these tubes if you don't have a 6N6.

Advantage of 6N6, didn't require the above bias components.

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