You provide such great information without any bullshit. No hacky jokes, the video isn’t 4 days long. No fat, just facts. Love it, and thank you.

@ScienceofLoud

5 жыл бұрын

It's a winning format that not enough people are doing. Thank you for your kind words.

@downskitty

5 жыл бұрын

A breathe of fresh air and an education is what it is, keep up the good work!

@maxonmendel5757

5 жыл бұрын

“dashing and charmingly good looking KZread celebrity”

@herberthooverfeetpics4595

3 жыл бұрын

There is fat, at 4:31

@thearabianmage

2 жыл бұрын

@@herberthooverfeetpics4595 as someone who lives a few miles from Watford and has just purchased my first tube amp, I would strongly argue that his recommendation of the company is incredibly useful for me.

"Having hundreds of volts surge through your body, is a shite way to die." I couldn't stop laughing.

I can already hear the news: "Young musician dies from electrocution after following internet tutorial on how to replace valves"

@rps215

5 жыл бұрын

That is what happens when you want power but instead you are getting UNLIMITED POWAAH!!!

@Andrath

5 жыл бұрын

ALL THE GAIN (through your chest). Aw no. I'll pass.

@utubehound69

5 жыл бұрын

People use to buy tubes at lots of stores & replace tubes for TV's radios…you test the tubes & picked what you needed.

@Andrath

5 жыл бұрын

@@utubehound69 You could buy cocaine at the pharmacy without a prescription back in the old days. :P

@TheTurtleneck64

5 жыл бұрын

@@Andrath You could buy dynamite at hardware stores until the 70's!

As a former Naval radar tech, I cannot strongly enough thank you for your words of caution. Voltages inside a tube (valve) amplifier are FATAL and must be approached with an appropriate level of caution. Cheers, Sir!

@wilsoncrocker

5 жыл бұрын

as a former navy/sub sonar tech, i concur. especially the part about grounding out the other arm & running current out crossing the heart. seen it. its not pretty & cooked human flesh does not smell good & stays on the boat for days. 🚫⚡🙌

@jc5604

5 жыл бұрын

Voltage isn't deadly. Think of it like a gun. Voltage is the caliber. Current is the bullet. Which one kills you?

@wilsoncrocker

5 жыл бұрын

@@jc5604 wtf is 'current'? are you trying to refer to amperage? your analogy is completely wrong. if you want to try to use firearms, the bullet is voltage and the amount of gunpowder pushing it would be the amperage.

@jc5604

5 жыл бұрын

@@wilsoncrocker Current is measured in amps, ya goon. Ampere is a unit of measure (like Celsius is a unit of measure for temperature). And no. Just no to your analogy. I guess mine was also not that great looking back, but definitely closer. The way I was taught years ago was using water. If you had a given diameter hose (resistance), you could increase the water pressure (voltage) and get more water (current) to flow at any given time. If you increased the diameter of the hose (lowering resistance), you also get more water (current) flowing. If you were being force fed water to your death, the pressure (voltage) isn't killing you. The water (current) is killing you. Therefore, current kills you. Not voltage.

@wilsoncrocker

5 жыл бұрын

@@jc5604 voltage is how many electrons are being moved. amperage is how much force the electrons are moving. ive been working on electronics for 30+ years, i dont need your poor laymens made up definitions & incorrect analogies to try to explain basic electrodynamics. thanks tho

I find it hilarious how it really is appropriate for his tone of voice and choice of words here. He get's that people will be foolish and get into things they don't understand regardless of the risk because of their natural curiousness and lust for tonal reward. So it really is best to highlight the most dangerous elements of the job so that when they inevitably do start poking around inside, they'll at the very least understand a bit of what not to do.

@weswheel4834

5 жыл бұрын

I enjoyed the stress on "trying to 'give it a go' " at 7:28 as well, quality.

"loss of volume, a thin sound and unusual audio artifacts". Wow, I hadn't realised how well I'd been achieving that valve-amp-sound using my solid state amp. As they say, its all in the fingers :)

@weswheel4834

5 жыл бұрын

Oops sorry, forgot to say: thanks for another quality video Colin. I don't have a tube amp to bias (so should be safe on that one...) but it gives me a better appreciation of what the option does on modelling amps.

I used to work in a fairly large UK music shop chain, and the number of times one particular old school engineer electrocuted himself (obviously not critically) working on valve amps was mental! - we used to call him electric Bob.

@fatninjacatmatt

2 жыл бұрын

So he shocked himself?

@philipm3173

2 жыл бұрын

@@fatninjacatmatt a number of times by the sound of it

@silasfatchett7380

8 ай бұрын

You can't survive electrocution, it means to die from electric shock.

These are the videos that I sub to this channel for. Informative, well-produced, and featuring a dashingly good-looking and charming electronics technician.

My gf keeps watching your videos with me. Normally she’s never interested in these type of videos. Hmm....?

@ScienceofLoud

5 жыл бұрын

Say hi to your gf for me ;)

@robcerasuolo9207

5 жыл бұрын

Sneaky way for a guy to tell another guy that he's attractive! ;P

@guitar19971

5 жыл бұрын

Let’s be honest mate: if your GF wants to fuck Colin who can blame her? I certainly would

@MatEnAlks

5 жыл бұрын

Same DM me Colin ;)

@WholeLottaBulldog

5 жыл бұрын

She likes blood sausage.

I’ve been playing the axe for 20 odd years mate. Your enthusiasm and knowledge about EVERYTHING guitars, amps, tubes, effects...etc..has made me (over the years) not only a player, but more of a technician too. Your a smart guy. It’s refreshing to see someone who delves deep into everything guitar based. Keep up the good work! 🕶✌🏻🎶

You made it again, Colin! Another great straightforward explanatory vid I've always been searching for. Thumbs up!

SOOO glad you brought up the "ONE HANDED" rule....very good on you brotha... it could save someones life...Great timing.... For those who have never changed out the Power tubes, remember, its best to re-bias when you change them. As a rule, most of us who have been doing this awhile, insist, its a must when you change power tubes...theres alot at stake if they arent biased right...I just got my set of power and preamp tubes for my Marshall JCM 800 2204 in the mail yesterday. Its time for a change up. ( In fact, I think almost ALL my vintage amps, 11 of them... are VERY well overdo...) I tend to stick with the new Mullards, I also have a bunch of Tung Sol....I might check out those you have as well....I'm also doing a filter cap change as well on the Marshall....and my first attempt at changing out the V1 socket. Its very loose and might be giving me false microphonics...Great vis as usual Colin.

@leocomerford

5 жыл бұрын

The good old Alanis Morissette rule.

@Sammy-tq6ru

5 жыл бұрын

Blaydrnnnr, correct me if I’m wrong but I thought you don’t need to re bias if you have a cathode bias amp.

@Blaydrnnnr

5 жыл бұрын

Your correct. If your output tubes, ( the power tubes ) are cathode biased, it never needs biasing, and usually CANT be adjusted. I didn't want to get into a more in depth topic since Colin was addressing the more known, " FIXED BIAS" amps.. ( most commonly known as your everyday, common tube amp, which are in fact, adjustable bias )

If you wanted to deter me from ever biasing an amp by myself, YOU DEFINITELY DID. This channel is a goldmine

Message heard loud and clear Colin. Given that being killed by the thing that helps me create my art is not the way I want to die, I will ensure I take my amp to a professional should it ever need service

@tulyar1043

5 жыл бұрын

DeclanG Be careful which ' professional' you take your amp to, some wil be good, some will rob you and do a crap job. How do I know? If it is a Marshall, give them a ring and have them look at it.

@Torchedini

5 жыл бұрын

Qualified risk taker

@geomusicmove

Жыл бұрын

At least you'd be dying while doing what you love. There's some virtue in that.

As someone old enough to have grown up in a time were tubes were still common in consumer electronics, I think you are understating the viable life of a tube. While tubes can go bad at anytime, they should generally last for years if not abused.

@thebamfordman

Жыл бұрын

Ditto. I've had valve tvs, radios and lots of amps. Never changed a valve in any of them, never had any trouble.

This channel is the ultimate source of knowledge.

Colin, I am so impressed with your knowledge of everything around electric guitars. For such a young guy it’s so impressive.

I always love your videos Colin, well spoken, interesting and to the point with plenty of information, this is more of what this platform needs, makes me proud to call myself Scottish. I will note though that you were mentioning about the Voltage of the electricity as the problem, slightly untrue as you can have millions of volts go through you and be totally fine, it's the current that gets you. 0.1 to 0.2 Amps being immediately lethal while anything above causes severe burns and stops breathing, people can be resuscitated from this but it's still a terrifying bleak outset. Not to say that makes biasing any safer, still a very risky thing to so, just mentioning an idle point.

One of the best YT channels out there. So much you can learn

Thanks Colin - some of the best tutorials on the internet (and I've watched too many to count).

Sir, thank you SO much. I had no idea that tubes/amps would drift out of spec. I checked the bias on my 8 month old, frequently-played Fender HRD4, and the bias was WAY cold. 48mv instead of the recommended (and still cold) 60mv. I tuned it up to 72mv and got back a SHIT ton of tone I didn't realiz I'd lost. Cheers, bud.

Believe me I completely understand how dangerous it is to mess with electricity. My grandfather has been a Master Electrician for about 35 to 40 years. My mom and dad have their journeyman license and at one point I was going to get one too, but didn't. I still help out my grandfather from time to time. It's no joke, you can very easily die from the smallest. Always be careful Colin. Cheers from Texas!!

Coming from a radio transmitter past, we had metering to allow us to monitor important characteristics like screen current, grid bias and cathode current ... some of our transmitters would use 20 x 4CX250 which gave 1kW often we used to schedule our maintenance from daily checking the valve readings and monthly where any bias adjustments were made. That was convenient as we just selected the valve and the was a pot for each valve on the front panel. So all you had to do was turn the drive off and the set the DC Cathode I by tweaking the grid bias pot. Your video brought back memories hahah

You're the man Colin. But seriously, get out of my head. You're always making videos of the things I NEED to see not soon after I've been forum searching. Always informative and funny as hell fam. Keep it up.

Cool! Thanks for explaining this. I recently got a Ibanez TSA5TVR which has one power tube and a preamp tube. I swapped out original Rubys with JJs. It changed the tone considerably. Warmed it right up. When I got the amp I had to open it up due to a screw coming loose from the transformer. Not much under the hood but great tone.

Ive been waiting for this vid for longer than I’ve been alive, Collin you are a great man.

This is very helpful, since the ones in my Bassbreaker are having issues. Thank you for doing this, it’s greatly appreciated, and I found where my bias is located, but I’ve been looking for a good video for me to see it done!

Finally, someone with the balls to explain the amp bias process so I understand and why I should my sausages out of the freaking wires. Well done and I will not be putting my hand near it.

This video helped a lot. I will be qualified for this next year when I'm done with my education and it's nice to have some videos to "check" that you're thinking right. But I do not recommend doing this to anyone who doesn't have the qualifications. Everything over 12V and arguably 24V is a dumb idea to try anything on if you're not a professional.

I am one of those "qualified risk takers"-I never thought of it that way, but he's right!

I really learn a lot from Colin's videos. Gosh, with all the risks involved, it is tempting to say you are better off with a solid state amp.

I've ran a Peavey Valveking 100 for 8 years with regular gigs and practice and only had to replace the valves once. Bonus is that those values/amp are already pre biased. Never had any tone or sound issues. The other guitarist in my band however has gone through 3 Marshall heads and severall Randall's in the same period all with valve/transistor issues...

@TheREDscreams

5 жыл бұрын

Elliott Henderson should i change 3 year old valves?

Genious in giving an overview on changing valves to every level of Amp-Knowers/Owners...... listen to him!

Probably worth mentioning that many lunchbox amps like that Tiny Terror do not require biasing. Generally speaking, most amps under 50w are cothode biased, so don't need to be rebiased when swapping tubes. Mesa is also a good exception to the rule with their confusingly named "fixed bias," which is different from what is traditionally called fixed bias. They don't require adjustment, but do require you to use tubes that meet tight specifications.

Dashingly good looking and charming information.

Great summary. I enjoy your videos. Lots of good info!

Well that has pretty much confirmed that i won't have a go at changing the valves in my amp! great vid man thanks.

Having been developing my own 30W Tube amp, I find this video hilarious (because it's generally on point).

AAAAAA...now I get it....Thought you were a electronics guy......need an electronic technician with 11years RF knowledge, who wants to leave south africa.. Nice vid Colin, you actually gave me some ideas with my dead valve I've been trying to fix for 15 years...FYI Teisco check mate 25

Great video as always, colin. Thx

Best argument for solid state amps to date. I Would have liked to hear you shred a bit before and after the valve replacement. Cheers monster from the id.

Wow! I just changed my preamp tube 3 days ago in my little Micro Dark amp. I know it's not a "real" tube amp, but I did get more gain/volume and tighter, more sustaining distortion from a Mullard 12ax7 17$ tube vs the stock JJ tube that was in there.

Great video! And all very true! ...if you have a fixed-biased amp that is, which is usually the case for amps greater than about 30 Watts. However, lower wattage amps are often cathode-biased which are “self-biasing” so to speak, and don’t usually need adjustment (unless the particular set of new output tubes you’ve bought happen to have characteristics that are REALLY far from the average for that type of tube). Vox AC30’s and Fender Tweeds, for example, are cathode-biased. So, if your amp doesn’t djent... it might not need re-biasing. If in doubt though, for sure take it to a good amp tech!

Great video! Also have The Kraken so will try this myself when the time come! \m/

As always your video is interesting, informative and thought provoking. Thank You. Your comment on the lifetime of valves makes me wonder how many tube amplifiers are sounding much worse than they should because of valves that are too old since the small amps never seem to get theirs replaced (and even the ones on ebay that mention they have fitted XXX valves "as an upgrade" never mention re-biasing)

"Wake up! It's time to diiiiiiiie!" First lyric of "Welcome to the Valves".

@1972LittleC

5 жыл бұрын

Write that song!!!

@Oilid

5 жыл бұрын

LOOL

@wfrancis25

5 жыл бұрын

LOL...GnR...my 1st step into metal/rock

@Oilid

5 жыл бұрын

Westley Francis 🤓👍 For me it was brutal... first cassette: SLAYEEEEEEER!!!!

@wfrancis25

5 жыл бұрын

Nice!!!!!!I'm sad to admit that slayer only came(and i shit you not)another 6 years later....mountain towns kinda keeps you back. im 33 and slayer was only when i was 19....angel of death and seasons in abyss and oooo, spirit in black

Tell em' Colin. Loads (no pun intended) of information in here. This is an awesome vid for Tube amp players. Death by tube amp is absolutely a shite way to die. If any doubts, take you're amp to a professional.

This is a great step by step tutorial. Thanks and release the kraken!

My Sunn 300T (made by Fender in the late 90s) has external test points for bias and balance, and it gives you the voltages to look for right there near the probe points. (Also, the trim pots are there. Also also, they're hidden under a metal plate that you must remove, so you can't accidentally foul things up during transport.)

Dexter's Laboratory and his rubber gloves. 7:45 What a relief. I was thinkig about buying their amp. The voltage itself isn't lethal if ampere value is low. Anyway thanks for video. Good and informative. Especially in Bugera case. Cheers.

Vintage Marshall and Fender amps didn't bother with matched pairs/quads of power tubes. On one hand, the tubes were of higher quality, and there was less variation, but on the other hand, a certain amount of mismatch produces uneven push/pull operation, resulting in increased even-order harmonics, which, all things being equal, will sound better to most people than a perfectly symmetrical signal.

Well done, that man. Explaining the risks beforehand is much better than letting people fry and die. Had a former student had to quit playing because he burned his hand by trying to faff around with his amp bias. Considering he could have died, I reckon he was lucky.

I have an old (c. 1983) Peavey Classic 65w amp with power amp tubes. When I first time replaced the tubes and took it to have the bias checked I was told it was self biasing. I hope this is true because I don't think I can carry the thing out to get it serviced anymore. Lol. Still sounds good and crunchy, but I run an external amp into the speakers these days. Yes at the correct impedance. Love your channel and vids. I've learned a lot!

@elmo7sharp9

3 жыл бұрын

Peavey valve amps don't offer an adjustable bias. They have fixed bias resistors that typically bias the output stage "cold".

Just subscribed, and I'm checking one video after the other. You're awesome, Colin! And your accent is pretty cool, too :D

One thing I love about my DSL40 is the biasing ports sticking out the underside of the shield for the power section. Dead simple to do and virtually zero risk. I have to wonder why this feature isn't standard on all modern tube amps.

Well done, great advice and insight!Thanks Brother!

I have learned so much from your channel, thank you

I remember when i lost my last friend to a shock from biasing his amp... it was tragic... it was my 18th friend I lost due to biasing and I had 3 cousins and an ex-escort who all died from biasing their amps too... Its starting to feel like a pandemic... please keep your kids from biasing amps... its a horrible way to die... damn you, Victory, Marshall and PRS... damn you and your dangerous biasing...

@ScienceofLoud

8 ай бұрын

My bad dude, please feel free to lick all the big capacitors inside your electrically live amplifier. Safety warnings are for the weak.

@27retrodaze

8 ай бұрын

@@ScienceofLoud Lmao... im only being sarcastic, youre safety warnings are 1000% necessary and my jokes arent meant towards you or your knowledge sharing... love your work, man...

now I probably know why my orange amp sound like crap now..... your videos are really useful! thanks

@thewitchfindergeneral4015

4 жыл бұрын

Skinny Panda I got mine fixed and I still sound like crap ) ,:

Great video. Thank you for making this.

Thanks! This was a really nice video

I’m bout ready for some more csflute.

I don’t even have a tube amp, I just came to hear you talk. Love your show Colin. Stay sexy

@slurpeexyza17

5 жыл бұрын

same

@Xakslied

5 жыл бұрын

vishastheomen same

Sated my curiosity as much as it convinced me to take my amp to a qualified risk taker. Thanks for maybe saving a life and stuff, nbd

The already awesome vdo make it even more superb with the accent! Thank you!

There are a lot of old Fenders, Voxes, Marshalls etc on their original power valves from the 50s/60s and still work perfectly well...

some additions: check what kind of bias your amp has... cathode based with el84s don't require adjustments, as long as you buy matched power tubes you can swap them out to your heart's content at home. when buying power tubes buy matched sets when buying new production tubes either buy two of everything, or try to use a seller who tests their tubes, because I have personally experienced around a 50 per cent failure rate with the modern stuff. They're either dead out of the box or they fail within the first hour of use. When you swap them out don't play for ten minutes and go, right she's done. Give it at least an hour, sometimes a bad tube will last that long and then go... keep an eye on the tubes if you can while testing in case one of them gives you a fireworks display, then you can switch everything off quickly before you lose fuses or cook stuff.

This made up my mind about not buying a valve amp. Thanks!

Traynor's YBA100 & YBA300 bass amp heads have a very user-friendly power tube bias adjustment on the back panel, so it can be adjusted without opening the cover. For each valve pair (1 pair in the YBA100, 3 in the YBA300) there's a bias adjustment pot, and 2 LEDs. One LED indicates the bias current is too low, the other indicates it's too high. Turn the pot to the left, until the low LED lights, and note the position. Then turn it to the right until the high LED lights. Then turn it back to midway between those points. For the YBA300, repeat this for the other 2 pairs. If only they were all that easy.

Alright alright I'm subbing. I'm sorry because I've watched a ton of your videos and have found you to be entertaining even beyond the knowledgeable content. I feel better about TBH.

The Revv amps make biasing really easy. It has deep sockets for your multimeter probes to go into right on the back of the amp, and small trim pots you can only get to with a screwdriver. You don't even have to open the amp.

The American SVTs have a cool rear panel biasing system. I think my buddy in high school had one that had probe ports but it looks like they use LEDs now.

awesome video!

Great video. Thanks so much.

Thanks man, great vid!

Ok there comes a time where you have to say I am in over my head and I need help. Since I am a retired cop here in the USA I don't know electronics but I do know a lot about death. So I will take my amp in to someone else. Thanks Man

@waynebrown1394

3 жыл бұрын

@Google user If you work in a bigger city for a while you see a lot of death. I have bad dreams of a call I went on in 1999. I never killed anyone and I am very thankful. But I saw a lot of cool things also and met a lot of interesting people as well. I also provided first responder care like CPR and stopping heavy bleeding. I helped a lot of people. Plus I made a lot of money. lol

My Marshall 2555x has external bias points. Very safe and easy to bias this amp. I believe other modern marshalls have a similar setup.

Cheers to Watford valves :-)

When I was a child, all the TVs were valve, my first amp was a valve one (actually a tape to tape recorder), my second amp was a valve (Carlsbro PA I think), my first proper guitar amp was all valve (Marshall 50W Silver Jubilee), next a VOX AC15 and my present amp an all valve Marshall. I never changed a single valve in any of them and never had any issues with any after years of use. I must have just been very lucky.

Well thanks for the warning. Rhis is the first time I hear about that risk. I was looking to solve a static problem but I'm gonna take it to a professionnal.

"Having hundreds of volts surge through your body is a shite way to die" Well said Sir, Well said!

Great job. Thank you for the vid

Excellent words of caution. You should have let us hear the old valves and new valves sound differences.

I just came across this video and really appreciate your work, Colin. I now know the correct way to remove/replace my tubes (I live in the midwestern US, where we pronounce it "toobs," not "tyooobs," and where we call a drinking fountain a "bubbler"), which makes me wonder if I damaged the sockets in my Mesa by just pulling on the tubes in the past. It would've been nice if the salesperson showed me proper tube handling/replacement when I bought the amp back in 2001. On biasing my Mesa, the manual that came with it includes a three-page essay by John Randall discussing how the company doesn't build biasing controls in any of their amps (at least up until that time) and that you shouldn't pay for the service (for their amps), as long as you buy and use matched Mesa tubes. I'm sure it all depends on the amp, though. Again, thanks, and glad to have hit the subscribe button.

@dru9918

5 жыл бұрын

A bubbler LMAO the midwest is definitely another world

Your las 3 videos where great! Great stuff Colin.

Thanks man this helps

Hey there, nice video again! Just wanted to know, if the preamp valves could be producing noise after some years and if the biasing is needed when they are changed, too? I've "created" my own (rack based) hybrid amp with an transitor PA amp and an Hafler Hellrazor Tube Preamp. My bass sound is pretty much killer now (Lemmylike) but this preamp is just producing so much noise and i was wondering, if the 25-30 year old valves could be the problem there? Thanks in advance for any usefull advice.

Thanks for the video!!! I have a Bugera Infinium that claims to auto rebias the tubes. So if we take the biasing out of the equation is it completely safe to change tubes with your bear hands with the power off? I mean are there certain things like capacitors that still hold charge or anything else we should be aware of?

Keep it loud. Nice. Helpful video. Thx.

I would love to see a new series about a guitar mod like the “Will It Shred?” Series. I really enjoyed that, since I’m trying to do something like that myself.

Loved the video Colin! How does your amp sound now? Did the different brand of tubes change the sound by a significant amount? Thanks from Dunfermline :D

Love this guy!!

Bugera 333, just flipped it on the other day, switches light up, but no glow in or heat out of the valves. My 333 is pre-infinium. I've been playing this amp for 3 years, never replaced the valves or biased them. My amp is in my basement studio, so the climate is relatively consistent. Wondering if the power valves blew because it is the start of winter, I came out of standby relatively quickly when I believe they blew. Usually, I'll powerup into standby mode, tune my guitar, when that's done, I'll flip out of standby and all is good. This time, I powered up into standby, gave it maybe 30 seconds at the most, flipped out of standby and valves don't light up, and there is no sound. Main fuse appears to be fine, passes current. So, wondering if colder (winter) tubes can be shocked by going to operational state too quickly?

I've heard changing the preamp tubes is fairly easy and doesn't require any special training. True? Also what type would you recommend for high gain applications? Currently my amp only has 2 12ax7 hg by Ruby. It has decent gain in the OD channels, but I'd like to get a little more gain out of the amp so I don't have to use a pedal to get modern metal tones. Your insight would be greatly appreciated! Thank you.

Hey Colin i have a Marshall i bought used and it still has the original power and pre amp valves. If i used a matched set of power valves would it be a major deal if i didnt bias the amp. Around where i live no one knows how to bias amps. I work as a full time technician for cars so i know enough about electrical to bias it myself but i would rather not destroy my amplifier

Great video, Would I have to bias or not if I switch one broken Marshall EL34 tube with a TAD JJ EL34 Tube in my Marshall 9200 Dual Monobloc amplifier?

Hi greetings from the philippines . Jeg er fra Danmark og vil bare sige tak for din video og forklaring . Jeg er kompetent til at foretage indgreb og din video gav mig en ide . Jeg har automatisk bias regulering i min Amp og mit nye projekt bliver at fjerne dette og erstatte det med manuel bias kontrol . Dette vil give mig mere kontrol og endnu bedre lyd ( total fine adjustent ). Tak for dine altid inspirerende videoer . Keep up the great work and keep warn people about the danger of high voltage .

Colin, do you know anything about 6505+ head "bias mods". I'm just wondering, cause I changed all my tubes about 2 years ago without biasing after (I bought the head 8 years ago and it had the bias mod implemented apparently). The tone is great, but I have some issues when setting my volume meter, some crackling noise of some sort, which is definitely not a good sign. Should I take my Amp to be re-biased?

I've just , finally, bought my first valve amp secondhand. It sounds great so I assume the valves are set up fine. As a general guide, if I'm only using it occasionally (I'm a bass player, and it's a guitar amp) how long can I expect to not have to worry about this? If it makes a difference, it's a Blackstar Htr-1 and will rarely be pushed hard.

@thebamfordman

Жыл бұрын

I'm so old my tvs we're valve, and some of the radios. Had valve amps for decades. Never changed a single valve in any of them and never had any trouble. Not saying the dude is wrong, but I wouldn't lose any sleep over it.

May i request some explanation video about advantages guitar pickup placement between using pickup rings and directly mounted pickups to body? Thanks.