5ar4 rectifier tube


I’m buying some backup 5ar4’s for my primaluna evo 100 preamp.  Upscale audio’s website says the Gold Lion isn’t suitable for this preamp. I like Gold Lion but there’s no explanation why.  There’s only one other choice on their site.  I also like Upscale audio.  Advise is appreciated..

george53

Showing 1 response by yoyoyaya

@OP - if the tube is a genuine 5AR4 there is no reason why any brand should not work. However there is a huge spread of opinion on whether the entire family of 5--4 and 247 rectifiers are cross compatible, even though they are pin compatible.