Mike is correct. I have used 27 inch of #18 wire on 3-500 tubes many times
and got voltage down to 4.97 volts for each tube. The wire is just one big
resistor and gets warm, but works fine. The life of 3-500 drops real fast
with high filament voltage.
73, Bruce, W8HW
========================
-----Original Message-----
From: Mike Waters
Sent: Saturday, December 10, 2016 19:15
To: amps@contesting.com
Subject: Re: [Amps] HIGH FILAMENT VOLTAGE
No need to use #12. Smaller wire = more compact. A shorter piece of #16 (or
maybe even #18), would do fine.
Depends on the current.
73, Mike
www.w0btu.com
On Sat, Dec 10, 2016 at 5:58 PM, kenneth Johnson <wa6rtp@hotmail.com> wrote:
I used # 12 wire …total of 24 inches long wound in a two inch coil placed
in each filament lead .
this droped the voltage on my henry 2k-3 filaments into specifation.
your problem is finding enough room to get the coil in there. at any rate
…a length of wire is the way to go.
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