Biasing my Peavey 6505 MH: novice amp biasing! First time or how to bias a tube / valve amplifier... 

I've had a 6505mh for about a year now and have been looking at possibly replacing my tubes which brings me to biasing the head, which brought me to your extremely informative video. I thoroughly enjoyed it and found it extremely helpful. Thank you for taking the time to put together the video as you went through the process on your own head. Sharing your knowledge and experience with different tubes and manufacturers. It is much appreciated. Cheers from the U.S.!

Excellent video! I purchased this amp on a whim about a month ago used for $300. I find myself using it more and more. It’s a lot more versatile than I thought. I play mostly classic rock and the tones I can pull out of it are amazing. It is really refreshing to finally find someone that doesn’t just play death metal. Excellent job mate! Cheers!👍🤘

Looks way better without, the backing and the logos in front, like 💯

If you are wanting to leanr more about Tube Amps I highly recommend Uncle Dougs channel. You will learn everything you need to know from him.

2 x 12 speaker and that head. Tweaked in. Nice. 🎸✌️😎

I think it's safer for your meter and maybe your amp also to have the meter already set before you plug the tube into it and connect it to the amp and power it up. Also I think it's best not to turn the meter's dial until you have powered off the amp and removed the meter etc. And I believe there are only three companies making guitar amp tubes. JJ (Slovak Republic), Shuguang (China) and New Sensor (Russia). New Sensor makes Sovtek, Genalex Gold Lion, Electro-Harmonix, Svetlana, Mullard,and Tung-Sol.

Another excellent video.

👍👍👍

Excellent video dude 🤘🏽

99% of your gain is coming from the preamp tubes so unless you are gunning the amp amp at high volume running the power amp tubes cold will do nothing. Cold running power amp tubes will just allow you more headroom at high volumes. These amps by their very nature are fizzy amps, preamp rolling can help a little but an EQ in the return will work wonders for taming fuizz.

Great video, very informative. My 6505mh has a low frequency hum after it warms up (around15 mins use), any idea what the problem could be?

Hi, were did you get your bias tester probe from? Great tutorial too

Question: have you ever gotten a guitar in that couldn't be intonated no matter how forward or back you put the saddles on the tune-o-matic bridge? I bought a Firefly recently and it won't intonate. Everything is flat. I put the saddles all the way forward and it's still slightly flat. Plus, the G-string intonates somewhat close - yet, every note on the fretboard is flat! All Firefly will give me for a repair is $50usd + $22 for a bridge to reimburse me for I bought for it to replace the stock one. Sounds like the bridge is in the wrong place because the nut is flush against the first fret.

Heyy I have that amp and after some time is doing some kind of pulse. I rise the reverb knob and it start to do a strange noise. Not sure if that has something to do with the bias or with the heat sensors. Have you had that issue before? Thanks

Fret friend grow up playing hardcore :)

at 0:54 --- you stated milliamps BUT, not whether milliamps AC or milliamps DC. Can you tell us which ?????????