|[AMRadio] Modulation transformer|
ranchorobbo at gmail.com
Sat Sep 5 06:47:28 EDT 2015
I think you can probably glue the bakelite back together with the 2
ton clear epoxy. that epoxy seems to have great insulation
properties. I have used it to glue porcelain.
Unless I am mistaken that transformer has a tertiary winding but I
don't know the turns or impedance ratio. the rig it was intended for
must have had a screen grid. I am told those transformers were pretty
easy to find at hamfests in the past. Like a lot of good things such
as real FT243 crystals they are hard to find now.
I bet using that 60 Hy reactor improves the frequency response of that
transformer and its power handling. I think it was gapped for B+
through the secondary.
On Sat, Sep 5, 2015 at 12:35 AM, Geoff <ars.w5omr at gmail.com> wrote:
> On 09/04/2015 07:41 PM, Rob Atkinson wrote:
>> Is this the Liberty Ship modulated CW iron that's being discussed?
> I'm pretty sure it is, Rob. Electrical dimensions aside, it's the
> physical side of it that needs repair.
> I know that transformer well. Otis/K5SWK used to run one with his 833's.
> I use a 60HY @600mA choke as a reactor to keep the DC off of the secondary.
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