TUBE BIAS, socket to me!
What type of gear? ALL Cayin? Do they need bias? What does the owners manual say? You've had the sames gear 47 years? LOL Just a couple questions.. IF it requires the bias to be set, it's usually not to difficult. Some units the setting are on the inside, that makes it a little tougher. BE SAFE... Regards |
The issue with balanced valves is just that "Balanced", left to right in volume and bottom to top, if it's a single, double, or triple. Sometimes the left and right share the same valve, they need to be the same, bottom to top. Incorrect bias can cause the valve to distort to quick, (to high) or sound muddy and thin (to low). If you're picky, and the amps are revealing enough, you'll hear the difference, no problem.. Gotta keep the pin pockets tight and clean and the unit tuned.. Regards |
Don’t rely on your tube tester to match tubes .. <<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>> What would you test them with, or rely on? A TUBE TESTER.... That’s right.. you have to maintain them too. LOL I guess you need a tester for the tube tester? Don’t rely on a "TUBE TESTER" to test tubes.. Just hit my funny bone..:-) One poster said.. "Monkey Bone"... Oh and flip the switch back to normal position on your amp after the Bias check and set... New valves recheck a couple of times over the next couple weeks of playing... Keep an eye out for valve failure.. they do.. New more so.. Regards |
OK yours is older.. Still no biggie.. I was taught by an OLD guy in the 70s. I looked at a newer one.. You can looked up the pin out on the valve. Find the ground, find the plate, you could see the wire going to the bias pot. There are a lot of the older ones with internal bias pots.. If you don't feel confident, best to watch someone do it. Pretty easy though.. Regards |
I’ll say this and let it go.. It’s better to stay out of trouble than get out of trouble... Bias is part of maintenance. Very simple. There are three types of bias adj. 1. The way the factory says to BAIS and WHEN.. 2. The way others tell you to or not. OR 3. NOT at ALL... The correct answer is what the factory says... Plane and simple. Yes it changes the sound.. especially if you bais low, it will sound muddy. If you bias HOT the amp will distort sooner (tube break up), and burn valves quicker... Bias is very important... Bias hot and turn the volume up...LOL.. go ahead... Bias low LISTEN.. muddy as all heck. Especially 60-1500hz.. muddy. YUK... jjss49, we are on the same page, 4 times a year is good for me.. YUP.. ALWAYS with a valve change..... ALWAYS.... <<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>> Billwojo... I just got my New Maxi. It does 4 large valves at a time. The Mini has been on back order for over 6 months.. They should have started shipping the 15th. There were 16 or 18 before me.. I love um.. A LOT faster a lot more accurate, than the older ones.. My 533 and 39 are OLD... They WORK very well, the 533 for small valves, and 539 for small or large valves. I use them to compare... I use a couple of known test valves. Pretty good information... <<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>> Last but most important.. OP I’m glad your happy... What else counts.. NOW if your looking for a little nugget..... :-) It may change nothing... One way to find out.. Regards |
https://www.pinoydvd.com/index.php?topic=139769.0 OP check this thread out pretty good, pics in all... Regards |
OP, there is one thing for sure. You know it's done, BETTER than most because you did it. That has always been my position.. Saying that, I have backed off a bit on the self imposed brain surgery (s). YES practice makes perfect.. Any volunteers? I'm getting close, not seeing double anymore, or less..:-) Happy Happy... Regards |
