2359glenn | studio
Jul 12, 2014 at 9:58 AM Post #10,141 of 39,983
 
  I am thinking seriously about doing just this.....pairing with ps audio nuwave dac & HD800
 
This means Grados could actually work quite well with this switch........this is looking better and better

 
Glenn has mentioned that only high current rectifiers should be used ( 3DG4, GZ37 & WE422A ) in such case i.e. for driving low impedance phones by using the 5998 switch with 6336 output tubes


You can also use 5AU4 & 5AW4 others will work but it will be pushing them to the max.
 
Jul 12, 2014 at 11:10 PM Post #10,143 of 39,983
Jul 13, 2014 at 12:41 AM Post #10,144 of 39,983
Has anyone tried a 5687 as a driver in their OTL? This tube is most notably used in the Audio Note Ongaku along with the 211 and 6072. To my eyes at least, with an adapter, it looks like this tube should work....
 
Jul 13, 2014 at 6:50 PM Post #10,149 of 39,983
I like the Basic Black! Great looking amp....As usual Glenn!
 
beerchug.gif

 
Jul 13, 2014 at 10:38 PM Post #10,151 of 39,983
  Here are a few pictures of my latest amp I am building.
 
Front with Amphenol military grade 4 pin XLR and 1/4" TRS jacks.
 

 

 
This one shows the 6AS7 to 5998/6336 switch.
 

 
I need that!
 

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