[sdiy] ot: long wave radio reciever for time/frequency

[Czech Martin]

In the meantime I have wound the antenna, another ferrite rod,
less loss. It is also shorter, so it will fit into a plastic
housing that I allreay have.

I also could get some ferrite cores to wind my own inductors.
They have Al=250nH, and I got 1mH, Q about 100 or so.
I use them in the collector of the amplifier transistors
as parallel circuit, so the stages will only have gain
arround 77500 Hz. I still have to find out what gain
is possible without self oscillation.

Anyway, after having these parallel resonators, the
wave form looks much, much better...

I never dealt with wire wound inductances before,
a good exercise...

m.c.