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Audio Forums >> Frequently Asked Questions >> Can 7189A be used in se84UFO?
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Message started by Bunky on 01/24/26 at 22:53:42

Title: Can 7189A be used in se84UFO?
Post by Bunky on 01/24/26 at 22:53:42

Hi,
The cap that Steve uses between pin 1 and pin 3 to enhance the sound on the 6p15p can cause problems in certain EL84's. I purchased a pair of Seimans EL84's from the 60's that were not compatible because the Seimens were internally wired between pins 1 and 3, where Steve placed the cap modification. I know the 7189 will work, but 7189A has a slightly different pinout. My knowledge of tube's and tube circuits is very limited. If anyone has knowledge or experience with the 7189A in the SE84 UFO I would appreciate any of your comments.

Thanks,
Bunky

Title: Re: Can 7189A be used in se84UFO?
Post by CAJames on 01/25/26 at 00:11:24

I'd never heard of the 7189, A or otherwise. But the way I read the datasheet is the 7198A is internally wired between pins 1 and 2, so that will likely cause problems as well.

Title: Re: Can 7189A be used in se84UFO?
Post by Hearafter on 01/25/26 at 03:30:38

I use Telefunken 7189 in my Taboo and they sound great! Not the 7189A.