Based upon my experiences it's a noisy tube that will never quiet down, :-( Sorry!
4 responses Add your response
Sometimes tubes, will act up, hum, hiss, spit, etc., in a certain circuit, and will be dead quiet, in another. Although the 5692, is an excellent sounding tube, and should be very quiet, some circuits, will stress it, that is why the GTA, and WGTA versions, were made. Any reputable tube vender, should extend a warranty, for a tube, that developes problems, in their initial use. I'd advise you, to contact the vender, and see what arrangements, can be made. Regardless, of the reason, you should expect that tube, to be noisefree.