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Ο λόγος στασίμων 1:1 ενός κεραιοσυστήματος, δεν συνεπάγεται τον 1:1 λόγο μεταφοράς ισχύος, προς την κεραία!
Showing posts with label GU-81. Show all posts
Showing posts with label GU-81. Show all posts

Wednesday, 17 August 2016

RCA 813 QRP transmitter!


The well-known radioamateur motto dictates to Listen, Listen and Listen again.
Since the presentation of the GU-81 regeneration receiver you had your chances to listen enough.


Now its time for you to transmit!
I'll give you the initial kick along with photos and the schematic for a QRP Tx based on the 813 tetrode tube!
Gentlemen, (and Ladies of course), warm your irons!


Μετά τον δέκτη ανάδρασης με την GU-81, τώρα κι ο ανάλογος πομπός.
Αυτοταλάντωτη 813 με κρύσταλο και QRP ισχύ εξόδου! (λέμε τώρα!)

Friday, 5 December 2014

GU-81 regen-receiver!!!


A regeneration radio oscillates and interfere at a marginal level.
Well, I guess you will have a hefty oscillation using a GU-81M as regen-radio!
Using 10Volts as Anode Voltage you may save yourself a lot of troubles!!!
All it is missing now, is a QRP Tx using 813 valve!!!


Ο απόλυτος ευτελισμός!
Η GU-81M με 10Volt Ανοδική, ως δέκτης ανάδρασης!
Σειρά έχει να σας παρουσιάσω έναν QRP Tx με την 813!!!

GU-81M