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EQUIPMENT FORUMS >> SE84UFO2 >> Hum with new 6N1P-EV
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Message started by Radiotron on 09/27/22 at 16:32:30

Title: Hum with new 6N1P-EV
Post by Radiotron on 09/27/22 at 16:32:30

Hi guys, I purchased a couple of Voskhod 6N1P-EV tubes to use as a backup in my new UFO2 and both make the amp hum a lot. The one that came with the amp works fine obviously. I’m surprised as both tubes come from a reputable online seller in Canada and were professionally tested prior to shipping. Any idea other than I was sold defective tubes? Thank you much.

Title: Re: Hum with new 6N1P-EV
Post by CAJames on 09/28/22 at 01:04:30

How long have you had them? Sometimes new tubes will hum out of the box but after running them for a few to several hours they quiet down.

Title: Re: Hum with new 6N1P-EV
Post by Radiotron on 09/28/22 at 22:55:07

Thank you for your reply. I’ve just received them last week and tried them for just a few minutes. I didn’t want to risk damaging the UFO2.

Title: Re: Hum with new 6N1P-EV
Post by Lon on 09/29/22 at 01:31:13

They shouldn't harm the amp. . . as CA mentions I would run them in a while and see if the hum disipates.

Title: Re: Hum with new 6N1P-EV
Post by Radiotron on 09/29/22 at 17:25:54

Will try that. Thank you both!