Jul 20, 2020 · The Tung-Sol RI 5881 is made to be a 5881/6L6(W)GB. Its internal construction is close to the RCA/Tung-Sol 5881 / 6L6WGB. If you look through the glass envelope, the plate shape and dimensions resembles the old 5881 quite close.

Apr 11, 2009 · Originally, there were differences between 6L6 and 5881 tubes. The 5881 was a bit more of a high fidelity tube to start. Often, over the production span of tubes, their characteristics changed, but the published data sheets did not.

May 11, 2005 · I have an 81/82 twin I'm currently overhauling and came across some 5881 tubes. Seems like an interesting adjustment, and the price is right. Has anyone done such a thing?

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Jan 21, 2010 · If you're around 400V with the amp biased for 20-40 mA per output tube, you're safe with the 5881's. You can still bias the 5881's without issue with a higher plate voltage (you don't have to necessarily bias them hot), but the higher plate voltage will degrade them quicker.

Oct 31, 2022 · It's a smaller, horizontal Z-type that will be a better fit in a Fender style chassis cutout. It's rated at 122.4mA max, which I think is fine for one 5881 at around ~350V. I changed the tone stack to the 6G8-A version.

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Mar 7, 2007 · My 5881 is helped with nice Yamaha P3500 power plant, both amps are driven thru prototype of Slovenian Stylos tube DAC, as an premplifier. My Tube DAC proto has almost the same DAC converter as ougly solid state coffin in the link, but it uses ECC88 buffer. I have 8 drivers per channel in my DIY speakers.

Title: 5881 Author: RCA Subject: FP-2011-11-11 Created Date: 11/12/2011 12:01:39 AM