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 Post subject: Which gauge/voltage of stranded wire to use ?
PostPosted: Nov Sat 30, 2019 10:06 pm 
Member

Joined: Jan Wed 16, 2013 12:04 am
Posts: 1638
Location: 77001
Hello all,
The items I repair are usually small suitcase tube
record players, and small console tube units
with power transformers.

My searching the net indicates that 20 G AWG/300 volt
wire is sufficient for most wiring between
tubes/capacitors/resistors.
As example, I've used NTE 20 G / 300 volt / 90C wire.

I'd like to know your opinions, suggestions and experiences.
Thanks !
Hotwax


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 Post subject: Re: Which gauge/voltage of stranded wire to use ?
PostPosted: Nov Sat 30, 2019 11:18 pm 
Member

Joined: Nov Wed 30, 2016 7:35 pm
Posts: 5725
Location: Sunbury, Ohio 43074
That gage wire is fine for most hookup use. Are you trying to match the wire cosmetically? If so, that's another matter. But if it's just for function, 20gage should be fine, even 22 will be OK for most uses if that's what you have on hand.

_________________
Preserving the hist. of electronics, one boat anchor at a time! :)
https://www.bbtvtestequipment.com


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 Post subject: Re: Which gauge/voltage of stranded wire to use ?
PostPosted: Dec Sun 01, 2019 12:29 pm 
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Joined: Jan Mon 18, 2010 2:13 am
Posts: 19869
Location: Dayton Ohio
The only area I would even think to worry about wire gauge is heater connections, especially 2.5 volt heaters where a lot of current is flowing. Your 2.5 volts may end up at 1.8 volts by the time it reaches the last tube with small wire.

The rest is such low current that it really doesn't matter 20 or 22 is a comfortable wire gauge to use. Sometimes it helps in tricky situations to use something smaller such as 24 or 28.
Its not critical in most situations. :D

-Steve

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Radio Interests
-Zenith
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-Pre-War FM
Consoles and floor models, the bigger, the better!


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 Post subject: Re: Which gauge/voltage of stranded wire to use ?
PostPosted: Dec Mon 02, 2019 2:18 am 
Member

Joined: Jan Wed 16, 2013 12:04 am
Posts: 1638
Location: 77001
Thanks Steve and Barry for the responses.

Barry: yes, this is just for functional wiring, not
aesthetic restoration.

Steve: I haven't encountered any circuits with tube heater
filaments using less than 5 volts, but I appreciate
the reminder on the higher current flow with
lower voltage.
Hotwax


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 Post subject: Re: Which gauge/voltage of stranded wire to use ?
PostPosted: Dec Thu 05, 2019 2:03 am 
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Joined: Jul Mon 01, 2019 4:42 pm
Posts: 361
Location: St. Louis, MO
Barry H Bennett wrote:
Are you trying to match the wire cosmetically? If so, that's another matter.


It's still possible to get some old style wires that are brand new: https://vintagewireandsupply.com/

They got reproduction plugs and other parts too. I just picked up a cloth covered twisted pair power cord and a reproduction polarized decagon plug for a 1940s Philco I'm restoring.


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