No one has mentioned between turn capacitance. This could be a factor if the
wire insulation is not the same material and thickness as the choke you are
trying to copy.
73, Dan, N5AR
On Sun, Apr 24, 2011 at 1:21 PM, Jim W7RY <w7ry@inbox.com> wrote:
> Isaac.
> I attempted to re-wind an Ameritron choke and was not too successful. I
> did
> not have the EXACT size wire that was on the original choke. That makes a
> huge difference.
>
> I would attempt to re-wind your choke or just replace it with an Ameritron
> choke. I understand you're not in America but it may be worth it.
>
> Please keep us informed and good luck!
>
> Jim
>
>
> --------------------------------------------------
> From: "4Z4TL_IARC_300" <4z4tl@iarc.org>
> Sent: Sunday, April 24, 2011 12:01 AM
> To: <amps@contesting.com>
> Cc: <w7ry@inbox.com>
> Subject: Re: Blown anode choke TL922
>
> > Hi Jim
> > The choke is a home-made replica (quite close) of the original stock.
> > I wounded it myself, but never evaluated it with a Dip meter.
> > (I counted turns, measured spacings, wire diameter & inductance, & copied
> > it to my best ability).
> >
> > In the last 2-3 months main bands were 20,15,10 & 12, mostly in RTTY at
> > 400-600w out.
> >
> > The amp was on 20m when this happened, no TX. I just flipped from SSB to
> > CW intending to QRT.
> > Since the prolonged heating is obvious, I think this has been building up
> > for the last weeks / months.
> >
> > MODS to the amp are numerous: pse see a page I prepared a year ago after
> > finishing the work :
> > http://www.iarc.org/~4z4tl/TL922/index.html
> > Tks , Isaac 4Z1TL
> >
> >> Date: Sat, 23 Apr 2011 07:50:47 -0700
> >> From: "Jim W7RY" <w7ry@inbox.com>
> >> Subject: Re: [Amps] Blown anode choke TL922
> >> To: "4Z4TL_IARC_300" <4z4tl@iarc.org>, <amps@contesting.com>
> >>
> >> What frequency have you been operating on? What other sort of mods have
> >> been
> >> to the amplifier? Is the plate choke stock or has it been rewound?
> >> 73
> >> Jim W7RY
> >
> >
> >
> >
> > -----
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