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the 25vamp22 sylvania crt was the best and longest lasting.it came in the hybrid sets(d12 and d16).it has a gray face and will produce a fine picture in any set.the 25vdmp22(very dark face) is the crt most sought after.when introduced in the mid 70s,sylvania always was touted as the best picture i.e.consumer reports,etc.those tubes didn t hold up very long,back in the shop days,3-5 year old sets were coming in with weak crts.many were swapped with zenith tubes and we never had a come back.i have swapped everything in everything and noted results through the years.i personally like the early sylvania 25v for longevity and the 25vdmp22 for the look.philco also had a nice look to them too.rca crts were excellent and they could be jolted over and over through the years to keep them going.the heavy zenith crts were similiar.that combo is a rare piece and i would love to have it.i have a crt,and aset of modules for it.good sets with only solder joints on the yoke and convergence plus power caps swelling up.somethimes the thermistor will let go.not too hard to repair.sylvanias were very big here in the south end of columbus and we saw way too many of them.simple,easy to fix and good crts,they don t make em like that anymore.sylvania gt matics,zenith chromacolors,xl100s were the cream of the crop.downhill ever since.just my opinion folks.
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