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Need tube advice

The plate fuse(KTK 1)on my Conrad Johnson LP70S has blown twice in the last week. This indicates according to the Operation Manual that one of the output tubes - 6550s - has failed. My question to all knowledgeable A'goners : Do I have to get a matched pair from Conrad Johnson or will any matched pair bought on line do? IOWs is brand etc important?
Many thanks in advance.
128x128sunnyboy1956
sunnyboy1956's avatar
sunnyboy1956 OP
424 posts
 
Many thanks for the advice/recommendations. As I live in New Delhi, India, I guess my choices are limited. Probably will buy a matched pair of NOS 6550 online and wait for a shipment from the local CJ dealer that could take ages.
Cheers
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sunnyboy1956 OP
424 posts
 
Just a quick update. Obtained a quad set of Tung Sol 6550s from Singapore for Singapore dollars 140.The amp is up and running. Have also ordered a quad set of SED 6550C from the Tube store. Excellent service. Now for the interesting bit : the Singapore CJ dealer quoted Sing dollars 695 for a pair of 6550s ie in excess of USD 1000 for presumably the identical tubes that I ordered from tubestore for USD 150 or so. Go figure.
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sunnyboy1956 OP
424 posts
 
Further update: Tube Store has refunded $6 post purchase on account of a price reduction. Wow now that is outstanding customer service !!
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