winged c 6550c is not good for ref 5se??


I ordered 3 of svetlanan SED winged C 6550c from 'Upscale audio' last week and it was not shipped until today, so i call them to find out what is going on here.
They told me they didnt send it because " This tube is not going to work well with your audio research amp and it will failed almost every time".
Is it right?
brandon1103
@Jtimothya,

Of course ARC wouldn't recomend the use of Vintage Valves in their equipment, they don't retail them !

I am rather surprised at your findings with regard to GE6550!!! Which I have never yet found applicable to the several GE's that I have rolled as the regulator in a Ref5se, and for my part leave the stock Sovtek sounding a tad etched and sterile in comparison.That said I have no experience of the same comparison in a Phono 2.

Are you certain that you tried an 100%, or close to, emissions example?
Jtimothya..thanks for letting know your point of view.Ill have a little play with the 6550 just to know.
Hi,Tsushima1,the ge and the winged c sound good thanks.They seem smoother on my older recordings ,which is nice.Have you tried the tungsol black plate.1950s