st. patrick Posted April 26, 2014 Share Posted April 26, 2014 Hey guys (and gals), embarrassed to ask BUT where do I start? Listening to vinyl on a VPI Scout with Sumiko bluebird (blackbird?). McIntosh 240 and Juiicy Music BBX. Suddenly the vocals (both Neil Diamond and Joan Baez) sounded muddled. Know Diamonds and Rust album well and put it on after Neil Diamond sounded weird. Confirmed it wasn't the album, but the system. How do I decide if it comes from the amp or the pre amp??? I note one of the tubes on the 240 doesn't "glow", but where do I start ? Thanks in advance for any guidance, Patrick Quote Link to comment Share on other sites More sharing options...
minermark Posted April 26, 2014 Share Posted April 26, 2014 Tube test time. 3 Quote Link to comment Share on other sites More sharing options...
mustang guy Posted April 26, 2014 Share Posted April 26, 2014 Sounds like a tube to me too. Test the one that isn't glowing first, but they all should be checked for good measure. Quote Link to comment Share on other sites More sharing options...
DizRotus Posted April 26, 2014 Share Posted April 26, 2014 (edited) Just go down the drugstore and put the tubes in the tester while you enjoy a vanilla coke at the fountain. But first you've got to fix the flux capacitor. Edited April 26, 2014 by DizRotus 1 Quote Link to comment Share on other sites More sharing options...
NOSValves Posted April 27, 2014 Share Posted April 27, 2014 Does this happen with digital or other sources the same as with LP's? Quote Link to comment Share on other sites More sharing options...
JJkizak Posted April 27, 2014 Share Posted April 27, 2014 Tube tester in a drugstore? JJK Quote Link to comment Share on other sites More sharing options...
jcmusic Posted April 27, 2014 Share Posted April 27, 2014 (edited) Back in the 50's and 60's here in New Orleans we had a drug store chain that had tube testers and tubes in every store, the good old days!!! Edited April 27, 2014 by canyonman Quote Link to comment Share on other sites More sharing options...
st. patrick Posted April 28, 2014 Author Share Posted April 28, 2014 Does this happen with digital or other sources the same as with LP's? Craig, good question, as I assume that would tell us if it is in the pre amp/phono section. I only have the TT hooked up in this system but will move a CD player and hook up, but can't do until tomorrow. Thank you, Patrick Quote Link to comment Share on other sites More sharing options...
NOSValves Posted April 30, 2014 Share Posted April 30, 2014 Absolutely. We can narrow it down further also. If the problem is still present with a CD player into the preamp then go CD directly into the MC240 inputs that have the level controls per channel to control the volume. If the problem is still present then you know its in the amp if not its the preamps line stage. Once you get it narrowed down feel free to give me a call to go further since it will get more complicated. Quote Link to comment Share on other sites More sharing options...
NOSValves Posted April 30, 2014 Share Posted April 30, 2014 One more thing which tube on the 240 doesn't glow? I missed that in your first post. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.