|26th February 2014, 01:05 AM||#1|
Join Date: Dec 2011
Location: Saint Paul, MN
Tube issue or SSE?
I built a SSE and have been using a Sylvania fat bottle 5AR4 rectifier tube in it. I picked it up used at an antique radio flea market in a PA with two RCA 6L6GC’s. I used it for about 7-8 months. I then picked up new on eBay one of the Philips 5V4GA’s which is supposedly a military mislabeled Sylvania fat bottle 5AR4 and started using that. Now about 8 months later I noticed that the getter on the mislabeled Phillips seems to be flaking off. See picture. I took out the old Sylvania and noticed that the getter is also flaking on it too.
Could this be a problem with Sylvania’s in general or something with my SSE? When running the tube doesn’t appear to run hot. I used the standard Allied 6K7VG transformer, C1 and C2 are both external motor run caps, I also use the Allied choke. All the voltages seemed to check out fine the last time I checked them. The amp is running fine and sounds great.
So is the flaking of the getters a problem? If so could it just be the tubes or is the SSE amp tearing them up? Any info would be appreciated.
Last edited by mpri; 28th February 2014 at 07:14 PM.
|26th February 2014, 02:21 AM||#2|
Join Date: Dec 2010
Location: Madison NJ
I would guess at it being the tube if the voltages check out and it isn't running hot.
If it sound good then I wouldn't be too worried though I might have a backup of a different brand close to hand.
Magnavox 185 amp w/ Vista Phono1+ w/ Dual 1219; Loth-X Ion 1 BS & Emotiva XDA2. WIP: Tubelab SE 300b
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