The bare copper wires are the 8-ohm side. Yes.
The other side, if color standards hold across different versions, you should pick the lowest impedance pair.
The transformer may have imprints indicating the low side.
My transformer that I have handy is RED for the lowest side of the other winding, and BLUE for the closest choice for low impedance use.
Well, your comments certainly
made things easier.
I hope I can get this final stage
running in a couple of weeks.
It won't be as refined as your
version, but I think there's a
good chance I can see this through,
thanks to your help.
It will be Big Talker serial number 2.
Best Wishes,
Bruce, DRS2
This is about Big Talker
Serial Number 2.
I have everything for the
final stage. I just have
to go through a cap assortment
to get something close to a
couple of 270 pF caps. 2 of
them, actually.
As you guys know, I have been
experimenting with running the
first two stages on different
voltages. I haven't gotten the
scope out yet to look at the
waveforms, but I will.
The final stage will be operated
at a lower power than Carl's version,
because the audio amp I have available
runs less power than Carl's Vellemen amp,
which he is using to modulate his final
stage.
So probably all of the stages will need
different voltages. I am thinking of
using a 12 volt supply and making a
voltage divider, or something like that -
to power all three stages (oh, and the
audio amplifier board that I have sitting
around - that's the fourth stage.)
I'm not an engineer, so I might need
some advice.
I would like to have this going in a
couple of weeks.
I have decided that the next project
will be the small solar panel that I
have the parts for. If that works,
maybe it really can power a Part 15
repeater (eventually.) Right now,
I'm just interested in the solar
part of the project. But that's after
Big Talker #2 is running.
Special Thanks to Carl, who is running
Big Talker #1.
After 13.560 and the solar panel projects
are going, it will be back to the
carrier current transmitter work.
Bruce, DRS2