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 Post subject: Question about the grids in a 6SA7 tube
PostPosted: Sep Tue 21, 2021 8:36 pm 
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Joined: Aug Fri 21, 2009 7:45 pm
Posts: 904
Location: Port Dover, Ontario
I am about to try aligning a set which uses one of these tubes as the converter.

To align the two IF transformers, the instructions say to apply the signal generator output "....to the converter grid....".

This tube has 5 grids and I am totally uncertain if the appropriate grid is 1, 2, 3, 4, or 5 (numbering out from the cathode).

Thank you for your advice.

Joseph


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 Post subject: Re: Question about the grids in a 6SA7 tube
PostPosted: Sep Tue 21, 2021 9:13 pm 
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It's the one which the antenna signal connects to, in a pentagrid tube like the 6SA7 that would be G3.

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 Post subject: Re: Question about the grids in a 6SA7 tube
PostPosted: Sep Wed 22, 2021 4:09 pm 
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Joined: Aug Fri 21, 2009 7:45 pm
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Location: Port Dover, Ontario
Thank you Mr. Detrola!

Exactly what I needed to know.

Joseph


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 Post subject: Re: Question about the grids in a 6SA7 tube
PostPosted: Sep Wed 22, 2021 5:03 pm 
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Joined: Jun Fri 19, 2009 6:34 pm
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Location: Long Island NY
In a typical pentagrid converter tube like 6/12SA7 or 6/12BE6, G1 is the oscillator grid, G2 is the oscillator "plate," G3 is the input of antenna grid, G4 is the screen grid, and G5 is the suppressor.

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 Post subject: Re: Question about the grids in a 6SA7 tube
PostPosted: Sep Wed 22, 2021 6:32 pm 
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Joined: Aug Fri 21, 2009 7:45 pm
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Location: Port Dover, Ontario
Thank you Chris!

Joseph


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 Post subject: Re: Question about the grids in a 6SA7 tube
PostPosted: Sep Wed 22, 2021 10:11 pm 
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Joined: Apr Mon 24, 2006 1:05 am
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Location: Ellington CT
From the RCA tube manual


Attachments:
6SA7.pdf [122.33 KiB]
Downloaded 13 times

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