HFU HF Underground

Technical Topics => Equipment => Topic started by: Looking-Glass on May 30, 2017, 2224 UTC

Title: Tecsun-2000 BFO problem...
Post by: Looking-Glass on May 30, 2017, 2224 UTC
Purchased a new Tecsun-2000 comms receiver last November and since then it has served me quite well, although it's a little heavy on battery drain when not on mains power.

Early this week I have noticed that the BFO is going further over to the right tuning wise, whilst tuning USB signals, and has reached the of the range. 

This has resulted in a station say on 8.076MHz now being on 8.078MHz USB as the BFO will not reconcile on 8.076MHz. 

This is very annoying if you log a new station and want to post it as the frequency, due to the now errant BFO, is not accurate.

Any other people experienced this problem?  Set works well otherwise.

Might ring the supplier and seek an explanation, I think it's just out of warranty too.  I have never had faith in any comms gear out of China. >:(

Title: Re: Tecsun-2000 BFO problem...
Post by: Josh on May 31, 2017, 1618 UTC
If you can get the alignment data you might be able to approximate an alignment using wwv and similar on air signals.
Title: Re: Tecsun-2000 BFO problem...
Post by: Looking-Glass on June 01, 2017, 0639 UTC
The manual provided with the radio is an absolute joke, not even a schematic diagram!

Grammatical errors abound, then again I suppose being Made in China it's in "Chinglish." ;D

I tried "reset" function with no result. >:(
Title: Re: Tecsun-2000 BFO problem...
Post by: Josh on June 01, 2017, 1547 UTC
If the 2k is the same beast as the Grundy 750 you may be able to get some info on its guts;
https://ixquick-proxy.com/do/spg/show_picture.pl?l=english&rais=1&oiu=http%3A%2F%2Fhamradio.mybb.ru%2Fuploads%2F0000%2F19%2F4d%2F6993-1-f.jpg&sp=ea7e8cff257a5d9e093c45a6c71eff72

And be ready to do some translation;
http://www.radioscanner.ru/files/download/file14299/dorabotka__shemnih_resenij_grundig_satellit_750_tul.pdf

http://www.radioscanner.ru/files/download/file14649/11_12_13_dorabotki_shemnih_resenij_grundig_satellit_750_tul.pdf

http://www.radioscanner.ru/files/download/file14299/dorabotka__shemnih_resenij_grundig_satellit_750_tul.pdf

Title: Re: Tecsun-2000 BFO problem...
Post by: Looking-Glass on June 08, 2017, 0836 UTC
Much appreciated thank you Josh, will check those links out when I get my three days off, must be a trimmer or pot to re-align that BFO...hopefully! :D