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Tubelab Discussion and support of Tubelab products, prototypes and experiments

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Old 10th February 2020, 07:03 PM   #1
rock12 is offline rock12  United States
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Default Psvane tubes

Has anyone used the psvane KT 88s in there SSE. They have a nice blue colored tube. They ask if your amp is self biased with automatic shutoff or manual bias I think for this I should say manual?
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Old 10th February 2020, 07:33 PM   #2
w5jag is offline w5jag  United States
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The SSE is cathode bias, sometimes called auto bias.
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Old 10th February 2020, 07:34 PM   #3
cogitech is offline cogitech  Canada
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Psvane tubes
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Originally Posted by rock12 View Post
Has anyone used the psvane KT 88s in there SSE. They have a nice blue colored tube. They ask if your amp is self biased with automatic shutoff or manual bias I think for this I should say manual?
AFAIK "self biased" = cathode biased (SSE) but I have no idea what automatic shutoff is.
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Old 10th February 2020, 08:16 PM   #4
w5jag is offline w5jag  United States
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1. Treasure KT88-Z CB Cobalt Blue Bottle Super Tube (GF-Select, Quad) | Psvane & Treasure Audio Tubes

I guess these are the tubes in question ^^^^

Given the constraints of the question, I would probably pick manual bias with the understanding that the cathode resistor value might have to be adjusted. The safe play is auto bias, but it sounds like those are weaker tubes.

At $500 Canadian / tubes, I accept zero financial responsibility for any and all consequences of this answer. All risk of loss is on the end user of the proferred information; zero, zip, nada, none on me.

I would probably just get some blue glass JJ's. Or red glass JJ's, but you usually have to get the red glass tubes direct from the factory outlet - last time I did that they socked me with VAT.
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Old 11th February 2020, 10:52 AM   #5
rock12 is offline rock12  United States
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Thanks for the replies that Looked at the psvane as a present the blue was cool and if they play well big advantage has any one heard these
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