I have received an e-mail from Werner(DL8BEG) who successfully reproduced the downconverter that I designed to receive DRM with the kenwood TS-450S radio.
Werner found a mistake I made in the drawings(now corrected):
Thanks to Werner for his correction.
This is a photo from his circuit:
Tuesday 29 July 2008
Sunday 22 June 2008
Recycled ferrite sleeves from the rubbish
Monday 26 May 2008
Receiving DRM with Kenwood TS-450S (II)
For those who are interested in receiving the DRM using the TS450 radio by Kenwood, here is a pdf file with the details and circuit. Remember it's also valid for TS690, TS850 and TS950 radios wich has 4th IF output at 36.891KHz for use with optional DSP-100.
I am waiting for any feedback.
73!
Here is a demo video:
I am waiting for any feedback.
73!
Here is a demo video:
Saturday 5 January 2008
RF interference from Sony TV set
I had a Sony TV set model KV-14M1E. Every time it was turned on(even in stand-by mode) I received an annoying QRM from it in my amateur radio. Since I know that the interference came by radiation one day I decided to open the TV and explored the circuit with a small loop probe. You can see how I did it in the next video:
I discovered two loops radiating RF:
Like a solution I was thinking about decoupling these loops with the right capacitor but I had got no time to do the modification, the TV set was taken away from my QTH.
Now my spectrum is clear, more or less, of human-made QRM.
I discovered two loops radiating RF:
Like a solution I was thinking about decoupling these loops with the right capacitor but I had got no time to do the modification, the TV set was taken away from my QTH.
Now my spectrum is clear, more or less, of human-made QRM.
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