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For those knobs with the voids on the inside, you could fill the voids with epoxy to beef them up a bit. I assume the knobs are readily available, so maybe just buy a few spares.

Good stuff, great progress.

Re those cable ties - If you want a slightly more factory look, rotate the 'ratchet' clip thingy to point downwards. I always do as it looks neater IMO.

Shout out to whatever mad genius had the idea of using mouse pads...

coming along nicely! Is that bass pot rated a bit? top view inside presence and bass pots look slightly rotated to left in vid. the jumper to treble looks a bit stretched as a result.

You can loosen the internal nut on the switch that rests against the inside of the chassis, so you never hurt the face plate

like that telecaster sound... similar playing technic and my hot rod deluxe with two drive pedals sound close enough... first drive is as lite drive... and second drive as attenuator with level on 25%

One recommendation: you can jumper the channel inputs over the first tube in order to avoid using a jumper cable on the front. It’s not period correct but it’s a lovely feature. Furthermore, those speaker impedance switches are so sketchy. I got a rotary from TAD and a baseplate that worked well but regular 2-way switches are probably even more reliable.

I wouldn't go for those powerful screen resistors. Schematic asks for less power rating, and that's important because you do want them to burn when the tube develops short to a screen. 5 or 7 Watt's resistors with such a powerful supply and high voltage is dangerous for your power transformer. Regarding the Standby switch, I would have just swapped it for the phase switch that is disabled anyway. Keep the amplifiers originality as well.

Bright cap comparison test coming up next! Really fascinating that one...

Coming along nicely! Sounds great. Can't wait to hear the cab(s).

Magnificent tones. The sound of my youth.

Huuuuge Yeatzee!!

Classic tones! The sounds heard on hit after hit...!

That tone is phenomenal. And as a tone chaser, you can expect it to change somehow, some way, and drive you crazy.

I am, like the top one.

Epic!!!

U checked the fuses rt .

Thanks for the video.

This thing sounds amazing, thanks for video.

Greatest amp of all times in my opinion is the 1965 fender twin reverb tube . That defined rock and roll to what it is today it all started in 65 . No other amp comes close to the sound. And works very very well with any pedal you want to throw on it.

Hmmm. My Hot Rod Deluxe's caps drop to below 40 volts within 10 seconds of turning it off. I bought a discharge thing and have barely even used it.

13:21 these are the hooks I'm talking about. Those things are only rated to 60 VOLTS DC. 😮😮😮😮😮 Every set I looked at was rated at 60 VDC. I doubt yours are rated for more. They're exactly like every other set for sale.

I'll just watch 5 minutes of this. 58 minutes later.....

100ohm screen resistors is a design flaw in a pentode EL84 setup.

The audio demo sounded great! What speaker and cab did you use for the audio demo?

I was shown by a great tech years ago when I saw him spray paper cones with WD40. I've been doing my speakers for 40 years now with no issues.

Every time I hear a Matchless it makes me want to save my pennies.

That lead dress lacing is a military spec thing. Aside: there are a series of old paperback books based on the USN ETP and the post WWii electronics training course, I once had many of them. They were published like texts for a correspondence course, worth hunting down.

I RAN A FENDER FRONTMAN FOR YEARS,TWIN 12S,STILL HAVE IT STILL WORKING FINE.YES,FENDER IS #1 .

I remember owning one. They are incredibly heavy, incredibly loud . Sound great for rock and country and even Jazz. Everything else bad. Weight , Price, when you put it on casters and move it plugged in and the reverb goes off look out. I prefer the Marshall Plexi.

Amazing job figuring out the coupling caps were leaky rather than just swapping out the bias resistor.

Was that originally built for Mitch Malloy... That's awesome if true.. Talented cat

I see several amp techs on YT using pliers to remove and install Heyco strain reliefs at the AC cord. Pliers have teeth that mar the plastic strain relief. Maybe I'm OCD, but this kind of damage is ugly and avoidable with the proper tool. The Heyco tool is expensive, but I found a knock-off on eBay for $15. This is analogous to several techs using an adjustable wrench on nuts at jacks and pots. Nut drivers are better..... much less chance of scarring the faceplate. Otherwise, I agree with your 3-prong AC cord wiring. I learned this same wiring from Dave Funk's book about 25 years ago! Good video Yeatzee.

Hey! Did you feel like there was no volume at all until you hit 7 or up after cap can change? Do you feel it's significantly quieter than the Vibrolux? Thanks!

Yeatzee! Loving the details overview of this awesome Matchless. I have some answers for you about the beautiful knots around the power transformer. Check out this NASA workmanship standard: 8739.4. The term you’re looking for is “LACING”. workmanship.nasa.gov/lib/insp/2%20books/links/sections/401%20General%20Requirements.html I’m an aerospace technician and design custom amplifiers, so this cross-section of assembly is right up my alley! -cheers!

I listen to great Instructional videos like yours. I honestly have to say that it's usually over my head. When you started playing your guitar, I was rewarded. What a swell amp! And yeah, I got a little smarter. Thanks.

*Dude I grew up in those days and I use to think the same thing, that EVERY SONG and EVERY BAND used Marshalls........! As a professional player and avid tone enthusiast, to my surprise you would be SHOCKED AND SURPRISED to find out just mow many folk were using MESA BOOGIEMARK SERIES AMPS, from **#Prince** to **#IzzyStraddling** of **#GunsNRoses**, **#Metallica**, **#BrianAdams**! Many folk were using the Mark series Mesa Boogie and even would have Marshalls ON THE STAGE but only as shells for a stage set up. Then th3re is the SOLDANO SLO 100 and in the 1980 many used a simple ADA JMP-1, either with an racked Power AMP or into the Return of a Head*

MHS all the way for me. AC10 sounded awesome.

Great work! Love your attention to detail. Sound samples speak for themselves...an iconic amp for a reason. It's time for me to finish my 50W Blackflag build - hope to achieve similar sounds

Good sounding amp. Looks like a nightmare to work in. Nice one! So how does it compare to the real thing?

If the socket of EF86 stands on rubber grommets to tame microphonics, and there is no galvanic connection from metal sleeve of socket to chassis, you need that extra wire to connect the metal sleeve of tube socket to circuit ground on chassis. Whether the screen resistor of EL84 is 100 ohms or 170, does not make much difference. It should be 470 or 1000 ohms to start to have some real effect because even max allowable screen currents are so small that those small resistor values simply don't give any significant protection to tube.

I personally wouldn't be using those hooks to test voltage that high 😮. Every single set I looked at was rated to SIXTY VOLTS DC. I had to buy some that are much more substantial than those. They have little alligator CLIP jaws that come out the end and are rated Cat III 1000V.

Very possible it could have been for Mitch Malloy the hard rock singer.

Forgive me, but my main concern is, how's the Marshall? 😊

Man that trem is swampy, I feel like I need to go have a shower now. Beautiful.

I like when amps are just simple, nothing fancy..... just pure tone........

yup, the king! I have had more of these than I can count and still have my '79 park and a '74 marshall as well as a number of 50 watters. The 50s are wonderful, but nothing like a super lead, your gonna love it!

Nope scratch that I was seeing wrong now that you are at a close up I was totally wrong

Is any of the doids burnt they look like one is on the left side? Then again my eyes are going one of the perks of getting old. Great work man I love watching your channel. Hey if you ever want to sell a 64 super reverb let me know