The Dude Posted June 13, 2011 Share Posted June 13, 2011 While I await for the arrival of my Scott 299, I am doing a little research. It calls for 4 7189 out put tubes, could the EL-84 be a replacement for these(I am having a hard time locating a couple of matched pairs). Also I noticed on some sights such the tube depot, that there are a couple different priced sets of tubes in the same brand. What does one get out of a higher priced tube, and do I need to keep a expensive power tubes with expensive pre amp tubes and so one. Any input would be appreciated. thanks Nick Quote Link to comment Share on other sites More sharing options...
Guest " " Posted June 13, 2011 Share Posted June 13, 2011 the el-84 is rated to 300 volts. the 7189 is rated to 400 volts. so the question....what is the B+ voltage in the scott 299? If the scotts B+ is over 300 volts, you cant use an el-84 Quote Link to comment Share on other sites More sharing options...
The Dude Posted June 13, 2011 Author Share Posted June 13, 2011 Thanks fritz, your all ways there to answer my questions, I will have to dig up some sort of schematic. Quote Link to comment Share on other sites More sharing options...
Guest " " Posted June 13, 2011 Share Posted June 13, 2011 Looks like the 299 has a b+ of 435volts. So you need to stay with the 7189 Quote Link to comment Share on other sites More sharing options...
muel Posted June 13, 2011 Share Posted June 13, 2011 My 299b has the Russian 6P14P (Cyrillic: 6?14?) in place of the 7189. They were in the amp when I bought it and have been working great for the last year and a half. Quote Link to comment Share on other sites More sharing options...
db101 Posted June 15, 2011 Share Posted June 15, 2011 You can use the Sovtek EL84M, which is the same as the Russian tubes muel mentioned in the above post. Quote Link to comment Share on other sites More sharing options...
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