K2 - Why no enameled wire for T4?

[Ross Primrose N4RP]

Why does the K2 manual tell you NOT to used enameled wire for T4?

73, Ross N4RP

--
FCC Section 97.313(a) “At all times, an amateur station must use the minimum transmitter power necessary to carry out the desired communications.”

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Don Wilhelm-4]

Ross,

3 reasons I can think of:
1) The enamel wire supplied is a smaller gauge than the green and white
wires that are also supplied.
2) If the enamel wire is scraped in the process of winding T4, there can
be a shorted turn produced.
3) If the smaller wire is used, it may overheat also producing shorted
turns.

If you do not have the proper wire, you can use most any #22 wire.  If
you use two different colors it is easier to tell which winding is
which.  Teflon insulated wire would be ideal, but not required at this
power level.

73,
Don W3FPR

Ross Primrose N4RP wrote:
> Why does the K2 manual tell you NOT to used enameled wire for T4?
>
> 73, Ross N4RP
>
>  
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Jim Brown-10]

On Mon, 31 May 2010 12:19:29 -0400, Ross Primrose N4RP wrote:

>Why does the K2 manual tell you NOT to used enameled wire for T4?

I haven't studied that circuit,but I'd guess it's because the
dielectric of insulated wire changes the stray capacitance, which
changes the tuning of the circuit.

73,

Jim K9YC


______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html