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AUDIO FORUMS >> General Discussion and Support >> Channel imbalance, problem solved.
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Message started by HockessinKid on 12/22/21 at 14:25:28

Title: Channel imbalance, problem solved.
Post by HockessinKid on 12/22/21 at 14:25:28

Woke up this morning, turned on the system and center vocals were skewed way right. This after I dialed in everything perfectly with the new KT77 tubes and new Snake River Audio speaker cables.

Anyway, started changing out L & R tubes in my CSP3, no problems there. Checked all my IC and speaker cable connections, no problems there. Ok, next the tubes in my Modwright modified CXN2 streamer/DAC - bingo! New pair of 74' Russian 6NP23 tubes and all better.

Feeling thankful after anxiety filled couple hours. Glad my hearing wasn't going too🤣😂.

HK

Title: Re: Channel imbalance, problem solved.
Post by Lon on 12/22/21 at 14:47:31

Easy problem to solve, glad it was sorted. Interesting that you like that tube type. I've tried a few pairs, including "coveted" ones and they always present far too bright in my system/room.

Title: Re: Channel imbalance, problem solved.
Post by HockessinKid on 12/22/21 at 20:39:03

Lon, those tubes in the Modwright Instruments modded Cambridge Audio CXN V2 are just perfect. Only place I use them in my system.

HK

Title: Re: Channel imbalance, problem solved.
Post by Lon on 12/22/21 at 22:36:56

Cool.

Title: Re: Channel imbalance, problem solved.
Post by duaneh on 12/27/21 at 21:29:13

HockessinKid—I use Russian ’74s in my Modwright modified CXN V2 as well (Reflector silver shield, from the Ukraine via Ebay). If you use the same flavor, what do you figure the life span is on those tubes?

Title: Re: Channel imbalance, problem solved.
Post by HockessinKid on 12/28/21 at 13:14:41

duaneh,

Only had 1100-1200 hours on these tubes. I expected much more, but every once in a while you get short tube life. Thankfully, I have a few more sets of these, especially given the long shipping times from Eastern Europe these days.

HK

Title: Re: Channel imbalance, problem solved.
Post by DirtDawg on 02/22/22 at 20:00:45

Going along with the theme of drastic moments of near panic and a simple solution, I get stuff warming last night and come back in about ten minutes to find my right channel is not working. I'm running two SE84Cs in mono.

So, I glance at my tubes, glowing in comfort and I begin at the beginning, yep all my switches are on, all my power cables seem fine, no one has kicked a speaker cable loose, etc.

I can certainly identify with the level of anxiety you went through.
But like the old saying, when you're going through Hell, keep going, don't stop!

Turns out I had not checked ALL my tubes for glow as well as I should have. One of my rectifier tubes was NOT glowing, after further inspection.

So a simple fix, indeed. But I feel like I dodged a bullet!

A tube that I fortunately had several to spare was the problem.
Sylvania 5Y3GT/G which I bought several from someone's classified ad here many years ago, kind of as spares, saved the day.

Now I wonder if the heater circuit failing is a common thing with this particular tube or maybe this is a precurser to further panic down the line.

Only other time I've had a tube just fail to start was an input tube ages ago.

Just one iffy tube, I hope!