Tube DIY Asylum

RE: thoriated tungsten

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Yup,a preamp utilizing #76s feeding 2C22s (7193). B+ regulated by the gas VR tubes. Best sounding to my ears as compared with a number of preamps including a Cary SLP-98. has switchable B+ depending on the VR tubes. I like the look of the OA3 compared with the OC3s is why I'm running the lower B+.



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