Jump to content
ELFORUM - Forumul electronistilor
rasebo

Reparatie radio Siemens RK641

Recommended Posts

Buna ziua, am un radio Siemens RK641 care are niste probleme cu potentiometrul de reglare a frecventei, iar in modul standby scoate un zgomot de fond.

Imi puteti recomanda pe cineva in Bucuresti care sa ma poata ajuta cu asa ceva?

Link to post
Share on other sites

Mi-am dat seama acum ca nu prea reusesc sa prind nimic pe SW, din cate am citit s-ar putea sa fie un tranzistor FET ars din cauza energiei statice, se pare ca acest radio nu are protectie pentru asta. Este vorba despre Q115 (2SK152-3) din cate am citit in link-urile de mai jos, dar nu ma pricep, asa ca... probabil si problema asta trebuie adaugata pe lista lucrurilor care sunt de verificat la jucarie (si poate pusa o protectie, am inteles ca se pot folosi doua diode).

http://www.redwaveradio.com/11_96fb2c494b201f8d_1.htm
https://groups.google.com/g/rec.radio.shortwave/c/qAgM-2-edO0?pli=1
https://www.w8an.net/sangean/sangean_ats803a.pdf
http://www.hawestv.com/amp_projects/fet_preamp/fet-mpf102-sub1.htm
https://components101.com/transistors/mpf102-jfet-pinout-datasheet-equivalents

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.Terms of Use si Guidelines