Yeah, ebay only sent me sellers from Bulgaria for these. I'm sure you read the reviews on these on the SW51s. I'm still only over a week on my SW51 so still enjoying the stock. But at some point I'll swap. Cheers on this.
The stock tubes are good! I've seen some of the chatter on the tungsrams, too. I'm with FlySweeps description as "beefed-up" stock.
Enjoy the amp! I don't think it needs a tube swap, though there really are some good improvements to be had. I just happened to snag the Tungsrams on a whim during the long shipping wait and it paid off. If all I had were stock, I'd still love that amp.
Cool, I would not trust any seller pimping tubes tested on vintage testers. Amplitrex is cream of the crop, but still I have had issues with noise and "matching" with reputed sellers bragging that they used the Amplitrex... They always allow returns because they know they can sell them to someone unsuspecting that are not capable of testing it themselves.
I wouldn't be surprised. I think if I was sniffing out rare, expensive tubes I'd need to invest in a tester. Though for less expensive ones backed by return policy, I'm not quite as concerned. The chances are a lot slimmer that some rare, expensive tube will be good, just by those things.
I never knew it could be that bad, though. But like you said, without testing equipment, I wouldn't. Something I'd consider if I was planning on hunting tubes regularly.
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