DISCLAIMER: I have no association with UVB-76 station, neither do I have any clue what is the content I am relaying. I can only assure, that the signal is received on 4.625MHz AM-modulated 900km NW from supposed origin and retransmitted unaltered. In no way can I guarantee this service, nor be considered responsible of any content re-transmitted. The only purpose for this relay to exist is because lot of people who do not have equipment or are located too far from station seem to be interested about listening to it. Should the UVB-76 station- or transmission content owners feel violated in any way, please contact me at uvb76.repeater@gmail.com and we will work it out.

Note, that because of shortwave radio signal propagation specifics the station can be more or less reliably received from around 4pm to 6am GMT on summertime. It is almost 24h audible during the winter, with short "skip-zone" blank-out around 6pm GMT.

The USB feed is considered as main source of audio today, as the voice messages are much better audible there than on the AM stream. However, the buzzer sound from the AM stream is somewhat more pleasant to listen at, so both feeds are kept simultaneously.

Sunday, February 6, 2011

SDR MK1 Preliminary Schematic

After several weeks in making, the first version of the SDR Mark1 schematic is finally here. Look at the SDR Project page, click "Schematic" at the index on left.

It may be a right time to apologise for the statements made earlier as "simple", "easy"  etc! :))
While in fact its not too complicated considering what it is about, I ended up with way more components than initially planned.
On the other hand, it has no cut-backs anywhere, so I can state that it is as good as my current knowledge of SDR design allows me to create.

Now to the PCB layout and then we shall see if it performs as supposed to!