IONUT DI Posted April 10, 2014 Share Posted April 10, 2014 Buna ziua .va rog frumos sa ma ajutati cu o schema pentru un amplificator de semnal receptie pentru o antena terestra .va multumesc Quote Link to comment Share on other sites More sharing options...
unuldinei Posted April 10, 2014 Share Posted April 10, 2014 Ia-ti o antena gratar din targ la care ii imbunatatesti sursa de alimentare . E buna , merge de la 40MHz la 900MHz si are si castig mare in amplificare , banda larga. Quote Link to comment Share on other sites More sharing options...
IONUT DI Posted April 10, 2014 Author Share Posted April 10, 2014 Ia-ti o antena gratar din targ la care ii imbunatatesti sursa de alimentare . E buna , merge de la 40MHz la 900MHz si are si castig mare in amplificare , banda larga.ce ar insemna imbunatatire sursa alimentare? Quote Link to comment Share on other sites More sharing options...
unuldinei Posted April 10, 2014 Share Posted April 10, 2014 sa folosesti o sursa reglabila de 5-12V , bine filtrata , o schema cu amplificator operational de exemplu , sa debiteze minim 250mA. Quote Link to comment Share on other sites More sharing options...
uvas Posted April 11, 2014 Share Posted April 11, 2014 Alea cu placi 9999(amplificatoare)si nu numai,merge si cu transformatorul ei. Quote Link to comment Share on other sites More sharing options...
IONUT DI Posted April 11, 2014 Author Share Posted April 11, 2014 as dori un amplificator sa merga in frecventa de 700-800 va multumesc Quote Link to comment Share on other sites More sharing options...
dan-a2 Posted April 11, 2014 Share Posted April 11, 2014 Cel mai bine : cumpara o placuta de la antena ,, gratar '' ,[sau de la cea ,, lighean '' ] > daca ai antena !! >> la cat costa ,nu se merita sa-ti construiesti singur un amplificator RF. Quote Link to comment Share on other sites More sharing options...
IONUT DI Posted April 11, 2014 Author Share Posted April 11, 2014 ma puteti ajuta cu schema unei antene pentru uhf Quote Link to comment Share on other sites More sharing options...
unuldinei Posted April 12, 2014 Share Posted April 12, 2014 Uite astea , pe cele din revista le-am "drujbarit" si eu . O observatie , antenele merg mai bine cu elementii izolati de sasiul antenei ceea ce nu prea e bine in caz de traznet. O receptie foarte buna o ai cu grupuri de 2 sau 4 antene realizate foarte exact si simetrizate corect. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
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.