Jump to content
ELFORUM - Forumul electronistilor

PL 504


Recommended Posts

  • Replies 6
  • Created
  • Last Reply

Top Posters In This Topic

Aici o schema dedicata cu PL504:http://www.qsl.net/yo5ofh/projects/25w_qro.pdf

Aceasta e schema pe care am testat-o si scoate 30W curati in 27MHz :rade: O mica constatare practica: cu 3 sectiuni de 500 pF in paralel pentru primul condensator din filtru, sigur nu se poate face acordul corect in 27MHz sau mai sus. Eu am incercat initial cu doua (oricum nu aveam variabil triplu) si doar in pozitia "total deschis" se acorda cat de cat, pana la urma am lasat doar una si abia atunci a fost ok. Probabil capacitatea parazita a 2-3 sectiuni paralel este mai mare decat capacitatea necesara acordului la frecvente spre 30MHz si de aici problemele. Cele 3 sectiuni paralel sunt utile in benzile de jos.
Link to comment

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



×
×
  • 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