I really enjoy watching and learning. That's why people watch your work, you are great teacher. So keep talking and don't worry about the length of your videos. I personally like to nerd out. You always let us know why you do the things you do and it makes sense. Great content 👍

13:07 When Lyle uploads another one hour video packed with information and knowledge.

Sir, your knowledge of the design and construction of amps is deep. I am not an amp tech, so the subject seems like an endless cavern to me. But it's really enjoyable watching you upgrade with such care. No problems with video length on this side of the screen!

Around 9:00 you talk about people complaining why you talk too much, but man I really appreciate all the talk through everything. I’ve learned so much by listening to the audio through your thought process.

Keep on talking, man. I’ve picked up quite a few tips in your coherent ramblings.

Interesting fact about Fender wanting you to upgrade by holding back the circuit. Awesome video.

Thank you for your detailed work/information. Both this and previous video steered me in the right direction on my second build, AA1164. I appreciate all that you do.

I've played a real '65 Princeton for the past 49 years.Wouldn't change a thing.

you make these videos as long as you want and I will still watch. I love these videos, keep them coming!

This is by far the best channel of the sort! Thanks so much for all the awesome content!

Such a joy watching/listening to you work! Thanks. p.s. Never too long, love the talk!

Always an interesting look inside the small changes that make a big difference.

Awesome video. Thank you for all the teaching and tips! Love the info on removing the components without damaging the board.

These videos are so relaxing and theraputic. Don't worry about the speed.

I love watching your videos. I’ve learned so much from just watching you do things that I’ve been doing wrong for a long time. You are absolutely right with the amount of people that “fix” or “mod” and amp and just completely butcher it which makes no sense to me. If your doing the work on your amp you’d think you’d want to do your absolute best and for sure if your working on someone else’s stuff even tho probably no one will see it, it’s still the point it makes you look bad.

I have learned so much about amplifiers and continue to learn watching your videos. Gratitude for your efforts and contribution. They are greatly appreciated by many. Thank you Lyle.

I'm new here. I really enjoyed watching the care and detail that you bring to Amp repair/restoration. Almost all of it is beyond my comprehension, but here I sit in rapt attention all the same! Well done!

Thank you so much for this video! I really enjoyed it, and your diagnosis of the tremolo problem gave me the answer to my situation with my own Princeton, which is a Limited Edition in Tweed covering with the Celestion 12" speaker. The reverb is rich, has depth and detail, but the tremolo has to be turned up on both Speed and Intensity almost all the way to get any hint of an effect. I also like how you have no problem working with PC board amps, unlike some techs, who shout and pout about how they will only work on a hand wired amp. It's not hard to figure out that most players, either pros or amateurs, or hell, just people who like to play an electric guitar at home, cannot afford a hand wired, turret board amp. Your work and step by step description of a problem, and how you repair it are very reassuring as to having a great sounding amp without extreme mods. Keep up the GREAT work! :)

I want to say that you are a really good guitar tech and teacher! Your knowledge of guitar amplifiers is head and shoulders above most guitar techs and even amp designers. I love your attention to detail and quality. This video shows that all the big and little details are what adds up to a great sounding and reliable amplifier. I continue to learn from you and thank you for your contributions to the guitar amplifier community.

Half way through and I love this video so much. As others said - make these as long as you want - they’re pure gold.

Your work is amazing. And I like watching these when I work on my guitars.

Great work, as always!! Really enjoyed watching

The greatest amp ever made. This was so interesting. You really know your stuff. The Amp sounds absolutely Killer. (and even better with your modifications). That upgraded tremolo was absolutely "Lush" - If I lived close to you, . . . I'd have my Amp Done for sure. Meticulous Work !!! Really enjoyed this informative video. oNe LovE from NYC

Great video.... All I have seen so far as a new subscriber are great videos. (I believe my 4th video I've watched). The length is definitely not an issue with all the great info and very detailed in depth info. Keep up the great work... Phil NYC Area

Thank you, Lyle! I really appreciate your attention to detail and expertise. I look forward to playing the amp. :-)

Sir I have the upmost respect for your knowledge I wish I had half of your knowledge you are greatly admired.

Man, I have learned so much listening to you.Talk in these videos so screw these guys that don't like you talking.In these videos, I'm learning s*** here.So I love it.Thank you very much for the education... Education is something that no man can ever take away from you.

I have one of these and my first mod was to rid it of all circuit boards and ribbon cables. I built a Hoffman turret board and put individual pots in it. It has a Tone Tubby speaker as well and once it’s finished, should be notches above the Reissue design. Always appreciate your videos, Lyle!

Your work is stellar sir. I learned tube theory while I was in the Air Force in the early 1980s working on autopilot amplifiers. We actually had classes on how to solder properly. You've given me ideas now on what I probably ought to do to my own Princeton Reverb reissue, and it's a great idea to get all the heat producers off the board, no doubt. Thanks for the video and the inspiration to basically make my own amp last the rest of my days.

Thanks for another great video. I hope you dont change your content, teaching involves communicating, usually in the form of talking. I have no aspirations to be a pro tech but I do like to build kits and mod amps and this info is gold to me.

I’m about to do this work on my 68 custom Princeton. Gonna use this heat the pins and push through. That’s badass!

Enjoyed this very much. I bought a reissue PR 7 yrs ago. I expected it to be like the originals I’ve had in the past. What a disappointment but still use relying heavily on pedals to shape the tone. I played the new band wired reissue convinced it makes me regret buying the PR issue 6 hrs ago. The price of the new hand wired is commiserate with a fair/good condition original. Then there’s this awesome video of a well experienced professional amp tech addressing and correcting quality issues. Of course there is a price tag for correcting quality issues. I’ve not heard of anyone trashing the circuit boards and hand wiring a reissue mod. Seems plausible but cost would put you in the neighborhood cost of new hand wired or vintage. Then there’s Princeton specks boutique builds that aren’t cheap. I’ve been buying, selling & trading guitars & amps for fun since 1980. I’ve owned countless amps of every major manufacturer. I learned quickly that a PR is the best all around amp to have. It’s size, weight and footprint is effortlessly manageable. Tone is crazy great. Haul a Twin or Marshall stack for a while and the PR gets better and better. That’s why PR’s are an excellent choice. Due to circumstances and raising a daughter for the past 20 years I’m resumed my guitar & amp hobby. I vowed to buy a PR opting for the reissue over original due to cost. $900 for a new reissue seemed like a no brainer. I didn’t expect it to sound exactly like a original vintage. As I said earlier. wow what disappointment. I’ve since thought Fender secretly swapped a refurbished Pro Jr in a new Princeton body. (Pro Jr’s are indeed great amps but if they cost $900 or more that would be disappointing) Again thank you for posting this video and educating me about my PR reissue. You my friend have given me née hope.

Thankyou so so so so much for this video sir I have a 64 hand wired reissue and the only thing I didn’t like was the tremolo speed was not slow enough I’m going to my buddy’s tomorrow to rectify the situation as it were . He’s a skilled tech and I’m smart enough to keep a hand in my pocket before I poke around with the other in a tube amp Thankyou !!!!!!!!!!

Thank you for sharing your knowledge. I wish there was an amp tech with your massive skill set near my area. Really enjoy watching your vids.

Just got myself an r.i '65 Princeton Reverb navy Blue with a Celestion 12" Blue Alnico. The amp is awesome but i wish to get the mods in this vidéo. To my hears these mods, make the r.i sound just like the vintage model. Awesome job Man... respect

Great video, I’ve been building amps for 30 years and can always learn new things! I use terminal strips point to point, that’s showing my age 😅. I love your videos, thanks.

Thx for pointing out the differences between a Deluxe and a Princeton. I always wanted to know that. Now I might get me a used Princeton and do the mods myself. Thx!

I’m a guitar player and know nothing about electronics but love your videos. The PR is my favorite amp.

Just picked up a 64 custom hand wired princeton. I'll save this vid for when I want to start tinkering.

Thank you so much brother. All the way from southwest Vic Australia. I’m serious about buying one of these amps & it’s so sweet as to know some of the tips & tricks in order to create the sweetest from our amps. A bit involved! 👀 awesome info though. 👍🏽✊🏽☺️

That's right, Laddie...shut the eyes and think of merry old England

I am slowly screwing up the courage to do my own filter caps on my Don Butler-era SWR Redhead. Deeply glad I watched this video first.

Great music 🎸. Knowing what you are listening for must go a long way to helping with your designs. Thank you for posting.

Keep on talking, and I keep on learning! I don't care how long your videos are.

This is a great video and has some things in it that I should keep in mind for my Blues Junior and my Princeton Reverb (especially the bit about the reverb driver tube at 27:25 - I need to check my amp for this; there's hum in the reverb output).

Great content as usual, Lyle - and tasty background music.

Moving the grid stop resistors to the tube reduces the problem of out of band oscillation very smart move . Seen that in live venue too many times.

I wish you were located in the Seattle area - I want this same treatment done my 65 Princeton RI. Amp repair here is backed up for 10 weeks and they aren’t interested in doing mods. Keep up the good work and I really enjoy your videos.

Great video. Thnx for sharing your knowledge.

Not too long at all, sir. On the contrary, I would gladly go for the full, extended version of the vid. Thanks for the great info and work 🤙

Preach on dear brother!

Reverb hum of my Princeton Reverb Reissue 68 is gone with your mod on the V2 tube socket, finally after 1 year trying so much different and useless advice from the internet, happy New Year, many thanks and compliments, Hajo, Germany

so chock full of solid, totally useful information. thank you, sir.

Excellent work. I wish you were in the UK!

great video thank you for being a good craftsman I appreciate your video, won a subscriber here!

I love this channel

I love seeing someone else cares about little things like the power switch protruding unnecessarily far. I thought I needed counseling.

Interesting, thanks for your detailed work. It has confirmed my choice to continue saving up for a 64 Hand Wired Custom Deluxe Reverb.

I like the long videos!

Great video! Thank you!

This video makes me a bit more comfortable on working on my own Princeton, gonna change out the negative feedback and fix that quick connect issue

Another great video

Very nice. Guitar has a nice sound through that amp.

That slow speed sounds great.

Have to love your perfectionist approach and the know how. Your modding is as the modding should be done, no improvisations and lazy shortcuts. Even where I would be sceptic at first you mostly convince.

Really nice work.

Too long? Au contraire, good sir. I would gladly pay for blow-by-blow extended versions of your vids. For instance, I want this mod done to my ‘65 PR reissue. Thank you for sharing all your knowledge and experience. Your content is among my all time favorites. Aloha 🤙

Princeton is my dream amp. I owned one years ago and had to get rid of it for financial reasons and things ain’t been the same since.

nice job sounds great

Making it more reliable, better sounding and making it keepable is "FIXING IT"

Hi Lyle . . . I just installed the new F&T elec caps in the '65 Princeton RI and also made the mod to V2 . . . I did not have any components to make the tremolo update . . . I"ll update C28 to a 30uf/500V F&T (it supplies HV to the 470Ω's) at a later date along with the tremolo mods. The reverb sounds mucho bettah as one of the 20uf was prolly leaky. . .. the hum disappeared and so did the oscillation whenever I put the reverb over "6" . . .now I have to do some fret work on the Tele as I got some "fret sprout" . . . tks for all the update info you give us here . . . 👍👍😎

Great video....love all these tit bits of information

I was just listening to this audio only while looking at something eles. Man I thought I was listening to an Uncle Doug video, lol... man you guys sound a lot alike!

Thank you

If I may, I've been listening to a lot of speaker comparisons too, and I think the best I've found for this amp is the Jensen P10Q, or 12 if you're lucky enough to have a 1 x 12 combo. But to each his own.

If it was my own amp, I would not bother desoldering the leads of clipped/replace parts...I would just solder new part to leftover clipped leads with a big, sweet blob - however, for a customer I would want it to look pristine and my work to be revered. I've done enough "dead bug" prototypes and soldered enough thru hole and surface mount components that I am lazy. Your work looks very nice. I left parts clipped in with test leads at gigs so I can swap....fun

Great video. Before and after sound comparison would have been nice though

Wow thanks great video. I want to do an amp mod someday.

Makes me want to go buy a Princeton and send it to you.

I'm inspired to work on my AC30CC2. It needs new filter caps

Lyle, thank you for an amazing video! I don't mind that length as I would rather learn more. I want to lower the noise floor of my amp and can't wait to rewire the Reverb Driver socket first. We can see that you replaced the following components: C18, C3, C4, R17, C16, R25, R57, C10, R59. Can you share the new values with us, as well as the tone stack, C19 and R52? At the power tube sockets, we can see the resistors, but don't see diodes D1, D2, D3 and D5. Did you omit these? Have you got under-board wires to attach R17 to the unused power node "C" at the + side of C27, and/or R39 and R40 to attach to power node Z at the + side of C26? Did you change the resistance of R59 or just increase the wattage and float it above the board? We can't see behind C27. Did you change anything about R60? Thanks again - great job! (post edited for layout)

Hey Lyle. Love the content. I’m very happy with my Vox AC15. Which was bought after your recommendation. I have an itch for a Princeton. Which would you prefer the 65’ with a tech’s mods? Or a MojoTone kit? I have built a tweed champ with success.

Great video, I have 68 DRRI will these same upgrades make it better?

"Close my eyes and think of England." LOL, I love using that expression, but most Yanks don't know it at all. =D

Great videos. I’ve got the hand wired custom shop Princeton, do I have to worry about this or make any mods?

Is the '68 RI pretty close in your experience (?) and did you consider slowing the Vibrolux tremolo (?) ...and thanx, I'm thoroughly entertained (as usual)

Guess who just fixed his noisy Deluxe Reverb.

Strange question: I really liked the early breakup on the 68 custom princeton - i have 64 hand wired reissue- would it be possible to emulate the 68’s early break up by playing with the negative feedback loop in the 64? I hear you can add a pot or switch to go back and forth

Any experience with the Princeton FSR tweed with Cannabis Rex 12"? I'm eyeing one as my first-ever tube amp (after 29 years of playing) and wondered if you had thoughts on it.

I can’t understand why people complain about the ‘long video’ or ‘too much talking’. There is a place for immediacy and brevity, and I would opine that the work you undertake, show and explain is not it. The demonstration and standard of your work (and its relative complexity) benefit greatly from the commentary provided. I can only think that it’s the ‘cut and slash brigade’ making the complaints. Keep up the excellent work. 👍

I wonder if you can make the same upgrades on the Bassbreaker 15. Would like to see that, since I've learned that it's near impossible.

Do you offer a modification for the Fender amps similar to the "JMI mod" for AC30 on your website? I am considering purchasing one of these reissues and would consider a mod package and maybe with power scaling. Thanks for the vids

I may be sending you my PRRI chassis to do the same work, don't know of any tech in my area that can perform what you have done.

As usual, very very nice work and attention to detail! (Like flush mounting the switch for instance) I have a request for a video. Could you do a video on your favorite tools you use for amp repairs. Such as the type of soldering iron you use, type of solder, testing equipment like your favorite multimeters etc. And what you use for a current limiter, type of variac etc. I know. Maybe boring stuff for some, but interesting to guys like me to see what professionals use. Thank you!

Hey Psionic love the video. Question? Problem with footswitch on vox AC15 cc1 footswitch for reverb and trem. No led light or able to engage reverb or trem. Checked cord for continuity and checked there was current coming from the little pcb board that the footswitch plugs into. Maybe have to buy a new footswitch as I did drop it. Maybe the input jack in the footswitch is broken. Anyway can I test that. Or better yet can I make it so reverb and trem are always on and just control by turning the knobs?? Thanks if you can give me a pointer.

Hey there, just did the reverb driver upgrade on my princeton 68 reissue. The hum (when reverb is turned up) may have gotten a bit better, yet still loud. do you or any of your viewers have a suggestion what to try next. could a filter cap be an issue? ordered a few, so i can replace the stock ones. thank you so much for help and keep up the great work!!!

Hey Lyle, I like your repeated advice regarding the importance of attention detail and doing things properly even in places where no one else is likely to see. Your tips on technique are great too. Early in this video you mentioned a modification to the cathodyne PI. I'm guessing that was to reference the grid bias to a voltage divider between B+ and ground rather than from the cathode circuit? Did you not follow up on that or did I overlook it? Also, I have some recommendations for solder and soldering irons if you're interested but won't clutter with those if you aren't interested.

I noticed when you made the heater wire mod, you cut the black and white wires from the board. Does this take out the resistors? I believe these resistors go to ground. Is this an issue we should be concerned about? Thank you for your help.

Excellent video as always. What wattage soldering iron do you recommend when working on these boards? I will be taking a crack at replacing some pots on a PCB-based Marshall soon. Thanks!

Lyle I just bought a new '65 Princeton RRI. Could you recommend a tech in my area that could do these upgrades? I'm near Colorado Springs,Pueblo but Denver isn't that far either. Thanks