Joined: 27 Dec 2007, 21:55 Posts: 2892 Location: Uppsala
Re: Vad är detta för rör?
Google från VintageAmpsforum
tubes (not the very early ones) made by Philips, VALVO or Mullard (with their mother Philips) all have the Philips/VALVO/Mullard date-codes, and for me there's not really a difference. the same is true for those tubes made by Philips (i use Philips as a generic for Philips/VALVO & Mullard) which were sold under brand-names like Telefunken, Siemens, Hoges, RSD, Ultron, Triotron, Haltron, Mazda, Adzam...
26 Mar 2012, 21:41
Sustain
Joined: 02 Mar 2003, 23:01 Posts: 1934 Location: Bollnäs
Re: Vad är detta för rör?
Min gissning är att EL34:orna, såväl som de nedre ECC83:orna, är tillverkade av RFT. Hoges ECC83:orna är tillverkade av EI Yoguslavia enligt märkningen.
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