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

I have sourced a new production Tungsol 6550 from The Tube Store in Hamilton (Ontario); I intend to use it in the power supply of my ARC Ref 3. Has anyone had any experience with the Tung-Sol TS6550 in the Ref 3? Have you compared it with the original Winged "C" SED 6550C shipped by ARC with this
line stage? Preferences? Reasons?

See:
http://thetubestore.com/tungsol6550.html
guidocorona
broederen
22 posts
 
Dear all,

After one day (no power on) the unit is now functioning normal again with the original swetlana 6550C. Anyone any thoughts?

Cheers,

Broederen
microstrip
180 posts
 
Just to add that my ARC Ref3 time counter shows 3674 hours and today I tested the original 6550 tube : transconductance was 5200 micromhos - this means the tube is still perfect!
oneobgyn
410 posts
 
ARC says you easily get 5000 + hours before retubing is necessary
elberoth2's avatar
elberoth2
1,223 posts
 
I have been using the NOS 6550 TungSol Black Plate without any single issue for the past 6 months or so, and so do my two friends.

My guess is that the problem is not 6550 related.
broederen
22 posts
 
Hi Elberoth,

You were spot on. Problem was related with the combination of ARC socket and pins of 1957 6550. Issue is now solved.

Cheers Broederen.
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