Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 19083
Brand: Tesla; Praha, Bratislava etc.
Tube type:  Beam Power Tube   beam power   Power/Output 
Identical to 6L50

Base SPECIAL TUBEBASE in general Top contact with a cap
Filament Vf 6.3 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC)

Sockelung ist ähnlich wie Magnoval, aber größer. 9 Stifte auf 10teiligem Kreis (25mmØ), Stiftdurchmesser 1,25mmØ.

Information source
6L50: P.ST
Peter Steffen

6L50: fr
Frank Reuter

6L50: Catalogue TESLA from 1968 year.
Josef Smitka

Usage in Models 1= 1953 ; 1= 1954 ; 1= 1955?? ; 1= 1962?? ; 1= 1965??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):5

Forum contributions about this tube
Threads: 2 | Posts: 7
Hits: 2568     Replies: 1
6L50 (6L50)
Wolfgang Lill

die Röhre wurde nur bei Tesla produziert

Hans-Thomas Schmidt
  2 Edit:

Angaben wurden ins Datenblatt übernommen.

Thread kann gelöscht werden.

Hits: 5331     Replies: 4
Tesla 6L50
Mietek Jozwik
  1 Have anyone idea how to obtain socket for Tesla 6L50 output Pentode (Supranowal socket) ?
Jacques Dudoret

Voici les caractéristiques de la 6L50. (source vademecum 1994)



John Turrill
Dear Mietek,
                    I think this has what in U/K we call the "Magnoval"
base, though it would help if you could provide some dimensions
such as diam. (thickness) of pins and diameter of circle the pins
There was an American base identical, except pins were thinner
(Novar) I think.
I have a few "Magnoval" bases, though someone like Jan would
no doubt provide if you told him it was for a 6L50, see ----  no doubt other shops, too.
Let us know the dimensions to get correct base type and it can
be added to RMorg archives.
                     John Turrill.
John Turrill
On further investigation, I am fairly sure the 6L50 is not the
"Magnoval" as I first thought; the dimensions on the data sheet
provided by Jaques Dudoret would indicate a much larger base
diameter - see also the photos in RMorg - I would still suggest
contacting the link I gave; if the worst comes to the worst, they
also supply various sizes of individual pin sockets, enabling
making up your own sockets, (precise marking-out required!!!)
Many years ago I made one up to suit an EL12, with success!
Further information,- see -----
dimensions available here) 
Useful pages!
Good luck,
                  John Turrill.
Mietek Jozwik


Thanks a lot for your help, data for the tube itself I had already, as I have Vademecum and Czech tubes catalogue.

Tube is nice and in data similar to 6L6.  Re-engineered for TV sweep circuits. As I ocassionally buy almost 100 pcs of 6L50 and few 6Y50 the only problem I have is to obtain few sockets. 

You are right tube socket is not a magnoval. Pins are 1.25 mm thick spread on 25 mm ring of 36 o each.



End of forum contributions about this tube

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]