ARC Ref 3: Tung-Sol 6550 in power supply?

Thanks Guidocorona

I have replaced the Svetlana 6550 with a 1957 Tung Sol. I'm surprised by the difference in sound. I'm not so good in describing but its seems tighter bass, increased resolution and more "punch". And the system is now playing only for a couple of hours.......................

I can imagine that for a company like ARC it is not possible to put these type of 6550's in simply because of costs and even more constraining: availability!

Cheers,

Broederen

hello forum members ,my local dealer supplied me a Tung-sol NOS 6L6WGB to try in my REF 3 , now the tube is 120 hrs in the amp .I like this upgrade . some month ago I also changed the other tubes to 6H30P-DR . This alltogether
made my REF 3 in my opinion a more musical machine .later on I will tell you the major upgrade my local dealer did in the REF 3 .This upgrade takes some more breakin time.
greetings from Holland Hans

Dear all,

I encountered an issue. After replacing the Svetlana with a Tung-sol 6550 Black Plate I experienced sometimes a moment without sound. After some time the sound came back (black-out?). Now my REF3 is dead. I replaced the Tung-sol with the original Svetlana and still no music! I checked everything including connections etc. What can have happened?

Try replacing also the 6h30 in the power supply - perhaps a failure in the Tung-sol 6550 has damaged also the driver tube.

I have to replace all 250 hours the 6L6GC in my powersupply. The sound becomes liveless. What's wrong?