Hi , I have a Rogue RP-1, not as nice , but some similarities. I replaced the JJ’s after about 10 hours . I use medical grade NOS Telefunkens . I have 3 sets. I started with NOS RCA 12AU7WA tripple mica’s. Nice sound . I have NOS Mullards ECC 82’s , sounds like somebody threw a blanket over my system . Kinda like pushing the Dolby button on a cassette player . I also have 2 pairs of Seimens nickel plates and Amperex Holland . For my taste and in my system the Telefunkens are hands down my favorites . The Seimens are second , very linear and defined , but a little bright on the top . The Amperex are even brighter . Unless I change speakers , I’ll stay with the Telefunkens . I just took a pair out with about 5000 hrs . The Tectronix labels had changed color from the heat . Popped in a new pair and could tell a difference . I feel about 100 hours on the tubes have them settled in . Also I like NOS Tungsram and the E I crossed swords too . So for me , I spend on good NOS Telefunkens and for budget Tungsram . Although the Seimens are pretty sweet . I assume you have a quality power cord ? I also have had good results with Morrow MA5 interconnects, after 600 hrs . As far as Rogue, they tell most people to run Mullards . They even suggested them to my buddy for his 180 mono blocs . I’ve had Hiss Problems too . I just had hiss on one side , so I changed Tubes . I didn’t bother to see if just needed reseating, I just replaced them . Also with four Tubes , if one is gain and one is phase ( ask them ) changing just one tube per side will have a big influence . The JJ’s are cheap and reliable , perfect for mass sales . So happy listening and I’ve babbled enough . Regards , Mike.
Questions from a Tube Preamp newbie
I have my Rogue RP-5 back from warranty repair and I am loving how it sounds. While at Rogue, they installed 4new JJ 12au7-s tubes. Sounds great. I have some questions.
1. with about 2 hours daily playing, how long do typical preamp tubes last (I have heard Rogue's, like CJ, can be hard on tubes)
2. Do new tubes need broken in? if so, what is normal time frame?
3. Does tube rolling really make a difference on a preamp vs power amp?
4. What is the general concensus on JJ tubes for a preamp? Again, I am really happy with the sound, so I probably won't change. However, I will eventually probably get the itch.
Thanks
1. with about 2 hours daily playing, how long do typical preamp tubes last (I have heard Rogue's, like CJ, can be hard on tubes)
2. Do new tubes need broken in? if so, what is normal time frame?
3. Does tube rolling really make a difference on a preamp vs power amp?
4. What is the general concensus on JJ tubes for a preamp? Again, I am really happy with the sound, so I probably won't change. However, I will eventually probably get the itch.
Thanks
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- 43 posts total
- 43 posts total