On 19 dic, 23:10, Sébastien MEDARD wrote:
Hello,

On Sat, 18 Dec 2010 08:09:52 -0800, Wimpie wrote:
Do you have some background in electronics and/or AC circuits (concept
of reactance, impedance, resonance, etc)?

I should.... But I was better in chemistry I should have studied RLC
circuits but at this time it was boring... If I had some interest in
shortwave listening, I would have been a better student in physics

But I should be able to understand I think I am going to see if there
is any radio club near the place I live. Because I have a lot of
questions and English is, as you understood it, not my main spoken
language

Seb.

Hello Sébastien,

I think it is a good thing to contact some people locally.

Besides support with the calculation for the inductors and capacitors,
small "construction errors" can degrade performance of a basically
good design significantly.

Be prepared to get many different answers to the same question!

Yesterday evening I experienced strong increase in mains supply
synchronized interference. After some elimination tests, the
"offender" was a new tiny switching plug-in adapter.

I had to use several ferrite cores to reduce the interference from
3.3 MHz to 15 MHz to an acceptable level. The volume and weight of
the ferrite cores I used exceeds that of the adapter.

Best regards,


Wim
PA3DJS
www.tetech.nl
without abc, PM will reach me