Don't let the trolls bother you so much. You are a top tech, ignore them.

Lyle I do not have the first clue what you are doing but I love watching these videos, thank you for making them.

Its cool that you did a video on the 68’ Custom series, as I just got a 68’ Custom Pro Reverb // definitely great to know more about how these are put together 👏

Nice work. I appreciate your getting to the point right away. I see your videos as mini crash courses in “here’s what I learned this could be” and the troubleshooting to get to the bottom of it. Super helpful for all of us who are just working on our own amps who don’t have the years of experience. Keep ‘em coming!

Great example of troubleshooting, Lyle.

2:36 Excellent point, beautifully presented 🙂

You are an amazing tech, nice work sir! 🤘

Lyle. Thanks great video

Thanks! I have a stereo amp that started doing this in the middle of the night. It only made sense that it was the filter cap (both channels), but I've been procrastinating trying to fix it. I think I'll give it a shot now since it sounds almost exactly like yours (I don't have any test equipment for something like this).

Always the sound one hears in those old films of Frankenstein's monster as his electrodes are connected...😉 😎👍

One time some years ago I foolishly forgot to discharge the filter caps. About 450V went across my chest from one arm to the other. It knocked me off my feet and REALLY hurt. I am amazed that I did not go into cardiac arrest. I don't make that mistake any more. lol

I will just put it lightly, a lot of people dont use their brains anymore...your a tech, and a great one at that, as you said, it is your job! Edit: i had one of these custom deluxe for a very short time, had the loudest noisefloor i heared yet, must have been bad from the beginning, needles to say i returned it as it was brand new.

Damn I wish I lived near you so I could get my amps worked on. I don't trust any amps anymore 😂

Now do a video on a Pro Reverb whose on/off switch no longer turns off like mine does!

The Doctor is in.

Dear Doctor Lyle. In the ongoing saga of making my 2020 ‘68 CDR actually useable I discovered it doesn’t have the 18k resistor, which means I didn’t get the legendary “Bassman tone stack.” Should I sue or consider myself lucky? 🤣 (Love your videos!)

I'm guessing that being an amp tech and getting to service really old amps from the '40s, '50s & '60s that in some cases were built by people who had previously assembled mil-spec equipment during World War II, current production amps must look especially cheap in comparison, LOL. In one of his videos Uncle Doug serviced a Gibson amp from 1946, the innards of which looked amazing, like something found in a B-17 Flying Fortress, all the wires neatly twisted and routed, etc.

The essence of debugging is to find faults. Those who cannot do it will be destroyed on the lathe of heaven. (Chuang Tzu as mistranslated by Ursula K LeGuin)

I have found the DER EE de-500 lcr meter rather helpful dealing with Caps able to test esr at 100,120,1k,10k,100k as well as inductance . As the boy over the pond say " A fine bit of kit" . Nice video as always keep up the fine work . So rather than insert the 18k resistor and cut the track could you not just up the in circuit resistor by 18k or did I miss some thing there ?

what is the procedure to power up new filter caps? all I can find is to gradually increase volts with a variac. do you leave all tubes in the amp? pull all the tubes? start at what voltage? define slowing bring up voltage..... tks David

This may be a dumb question as I am fairly new to this, so apologies in advance,….but at 6:38 when you are testing the smaller capacitors, what are you measuring and what setting do you have your multimeter set to?? I have a “real tube” pre amp overdrive pedal from the 90s and it’s giving me problems and has a bad hum/buzz when in bypass and even worse when kicked into overdrive and I’m starting to think maybe it’s the capacitors that are bad in it because the tube looks fine. Thank you in advance

Where is video 2 of this ? Did the hum go away ?

Wish the amp model had a real master volume

What if new filter caps don’t fix the buzz? I have a 78 ultralinear twin that I cannot stop the buzzing. The bias drifts no matter what I do, I have changed caps, pots, and resistors, The only thing I have not changed is the output transformer. What am I missing?

Dont worry about the haters Lyle. Tay Tay etc.

Hey Fender. How about making F&T filter caps stock? They may help sales.

Hey! Thanks for the video, I have a simular problem with my tweed amp, made a little video about it, maybe you would chevk it out and see if it's probably the same issue?

This is literally the problem I'm having with my 67/68 Twin Reverb now. It's been at the tech 3 months and he's getting help with filter cap. I'd like to pick it up and drive it to you. Interested in fixing it? I'd be grateful. It's a vintage one. Drip Edge

I have a peavey special 130, solid state amp that also buzzes. do SS amps have capacitors also?

After watching a few of these videos, Im not buying a Fender amp anytime soon. Maybe its an overreaction, but come on Fender. American quality used to mean something.

Yes, the sniff test. If it smells like fish, eat all you wish. If it smells like cologne, leave it alone!

What year is this amp What kind of lifespan can we expect ou to these caps? Or is it just random.

Any one complaining he only criticizes cheap new amps clearly hasn't watched the $5k vintage amp he says "the designers designed this wrong" lol