2. amps-preamps
  3. 1199044157

Audio Research amp's retubing experiences

Hello I have to retube my ar ref 600. someone retubed ar amp's generally?
the amp has 6550 svetlana C and 6922 sovtek's. since we are speaking of a big (!) number of expensive number's I am asking which brand are to choose... someone suggest me telefunken nos goldpin, others amperex bugle boy or mullard nos....
for the powertubes someone suggest me to use kt88, instead of 6550...
some suggestion's
Thank you very much!!!
Alex
alexismaster

Showing 2 responses by alexismaster

alexismaster OP
35 posts
 
the tubes in my 600 are svetlana C 6550. since they are very good tubes, I would try to change the 6922 from sovtek, what I know a good and rliable tub, but absolutely not camparable with nos telefunken etc. A technician said me the always first tubes makes the sound....
Now I am considering varous tubes brand's , since the price for 24 matched telefunken, about 100 Euro/one here in italy is not a joke. Some good ideas? someone tested Amperex BB, Philips, Siemes Mullard's?
The best dealer for tubes in the States?
Thaank you very much...
alexismaster OP
35 posts
 
I finally choosed to replace, for the first act, the little tubes inside, the12+12 sovtek 6922 with mullard military grade nos and telefunken nos for the input tubes.
The sound improvement is no less then dramatic... the amps are quite not same.
I am speechless.... I suggest to try the same to all arc owners!!!
More to discover