Shielded feedback loop

arduino based linestage using 12B4 tubes

Shielded feedback loop

Postby seanzozo » Mon Mar 02, 2015 8:34 pm

I'm stuffing the board on my budgie and I have a question about the shielded jumper for the feedback loop. From the photo, It appears that I make some connection to the + and a - terminals at both ends.

Obviously a signal wire runs between the two + terminals. I can imagine three options with regard to the two - terminals:
1) signal wire connected at both - terminals and the shield at only one
2) signal wire and shield connected at both - terminals
3) only the shield that is connected at - terminal with no signal wire?

Is there one thats preferred?

Sean
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Re: Shielded feedback loop

Postby TomMcNally » Tue Mar 03, 2015 10:01 am

See Shannon's picture here ... both shield and center conductor connected at each end.

http://www.diytube.com/phpBB2/viewtopic.php?f=26&t=6174
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Re: Shielded feedback loop

Postby seanzozo » Thu Mar 05, 2015 12:24 pm

Thanks Tom.

On reviewing my question I realized I forgot to mention that the wire Shannon sent with the Budgie was had two signal wires in addition to a shield. I couldn't be certain from the photo whether Shannon had hooked up the second signal wire in addition to the shield. I'll just ignore the second wire.
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Re: Shielded feedback loop

Postby Shannon Parks » Sun Mar 08, 2015 8:30 am

seanzozo wrote:Thanks Tom.

On reviewing my question I realized I forgot to mention that the wire Shannon sent with the Budgie was had two signal wires in addition to a shield. I couldn't be certain from the photo whether Shannon had hooked up the second signal wire in addition to the shield. I'll just ignore the second wire.


You are 100% correct - just use the shield and one wire. I've clipped the unused second wire in that photo.

Shannon
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