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

Showing 1 response by vegasears

Buying the tubes from CJ may be pricey but if something goes wrong later. The first thing they will ask "What tubes are in the amp(s)?" Then you can say back "THE ONES YOU SOLD ME!"

I always buy matched power tubes plus one or two just in case, to have on hand. I recommend finding a tube dealer you trust, knows your equipment and sells products you want.

I like Kevin Deal at Upscale Audio. I have always had good luck with his product. I have gotten tubes cheaper elsewhere but in most cases there have been problems. Search the forums and many highly recommended dealers.