Thank you all for the Birthday wishes. Love you all and thanks for being part of the D-Lab Family!

This video has saved me hours of research. I love my EHX MIG-50 and now I know exactly what to do when I need to swap out the tubes. Subscribed! Thanks man.

In the manual of the new MKII version, it mentions improvements in many sections of the amp, including the power supply. Perhaps they went on and fixed the bad soldering job? Happy belated Birthday, Terry. Amazing and very interesting video!

Happy bday! 🎂🎉. The EHX MiG-50 is a “assembles in usa” reissue of the Sovtek Mig-50 made in Russia. Mike Matthews moved EHX to Russia in the 80s and made tubes and amps under Sovtek name. He brought EHX back to us later. But I bet you remember those old green Russian tank big muffs 😄

"Tower, this is Ghost Rider requesting a flyby" - EH circus boards are a lot more entertaining than Fenders!

Happy Birthday Terry, Bless you and your family!!!

Yup happy birthday Terry 🎂🍷

From Leo: I have heard multiple comments where players do not like the sound of the MG50 chassis. If they come with the output tubes at less than 1/2 bias current, making that adjustment should really make the tubes more responsive. Happy birthday!

Happy Birthday Terry! Thank you for sharing your vast knowledge with us and wishing for many, many happy returns!

Happy Birthday Terry, and thank you for another great video.

Very nice of you to share the service procedure! Happy late birthday!

HAPPY BIRTHDAY, Terry! And may you (and Marsha) have many more.

Happy Birthday, Terry! Always look forward to your videos!

Happy Birthday Terry! Thanks for sharing your knowledge!

Happy birthday Terry! Great channel!

Happy Birthday D Lab

Well done Terry!! Happy Birthday!!

Another great video. Happy birthday! Love it when you're working on tube amps.

HAPPY BIRTHDAY TERRY! I like to say I enjoyed watching your videos, not only the knowledge you shared but also your calm voice is reassuring.

Happy Birthday, D-lab!

Happy Birthday D-lab!!

Happy birthday Terry, and thanks for the video : another great one and some more to learn for us... I thought birthday gifts were the other way around! 😃

Happy Birthday Terry!

Happy Birthday, Terry! 🎂

Many Happy Returns, Terry. Fun to watch your vids.

Happy Birthday Terry!!

Happy Birthday Terry...Keep the videos coming!!

And Happy Birthday Terry I hope you have had a great day

Happy Birthday Terry! Hope you had a wonderful day.

Happy belated birtday, Terry. You've inspired me so much with your numerous guitar amp projects. Thanks for that. I've accomplished to build some of them.

Happy birthday Terry, Cheers !!!

Happy B-day. Love the video

Ha! The solder spindle I inherited from my dad is Kester but it doesn't say what type it is. I'm sure he bought it back in the 80's or possibly the late 70's. I think this spindle will last the rest of my life. Don't worry, Terry, I don't solder often; I know my limitations. 😛

You sir, are a treasure trove of information. Subscribed. Can't wait to watch everything you do.

Happy Birthday Mr. D-Lab! Wishing you a happy, healthy and prosperous year ahead. Glad to hear good news about your Johnson as well... :-)

Happy Birthday! And nice video too!

Happy birthday Terry. Another wine job. I mean fine job!

Happy Birthday, D-Lab!

Happy Birthday D-Lab! You still look younger then the equipment you repair.

Hope you had a great Birthday Terry

Thank for spending your birthday with us...

Great job Terry.

Congratulations on another successful orbit!

The Sovtek Mig-50 was made in the 90's with Russian style parts. the EH version would be considered a re-issue, and uses "general" electronic parts. If you see the original, the resistors and pots are especially unusual, and may have been soviet surplus.

So we talked about prostate solder joints and your Johnson still works. Gotta love electronics sense of humor from a real pro. Happy birthday Terry!!

Happy birthday!

Happy Birthday!

HAPPY BIRTHDAY THX FOR YOUR SERVICE SO MUCH CONFUSING AMP TECH ON WEB YOU ARE STRAIGHT TO THE POINT LOVE IT

Happy Birthday, Terry! Many thanks for sharing your knowledge and love of electronics. I'm saluting you with some vintage grape juice in my D-Lab wine glass. (Alas, I'm out of wine..)

Have a very happy Birthday terry...blessings from England UK...:-)

Well we now know how to get a broke Johnson up and working without D-Lab. Try to insert a little blue pill in the input jack. Finally if you can't turn off your Johnson after four hours pull the plug.

happy birthday my friend

happy birthday Terry

WoW !!!! Happy B-day T-MAN !!!!!! Great Video !!!!!!!!!!!!

Love your videos, actually I fixed a few amps because of your knowledge!!! I just want to say thanks and keep them coming

Happy Birthday

Really enjoyed your video love ham radios everything I own is valve including guitar amps keep up the good work. Happy birthday by the way.

Cheers to you Terry.

Happy birthday Terry, and I am glad to hear that your Johnson still works. Ha-ha-ha

When they build those pin 8 is the pin they used to adjust where the socket is set for height, and alignment so it's slid around until the socket is where it's supposed to be, and then pins 1-7 are soldered in, but all the flux was cooked off the pin 8s during the initial positioning of the sockets. They SHOULD suck that fluxed up crap solder off pin 8 and resolder it. NONE of those solder joints look acceptable let alone good. The ONLY time I add extra liquid flux is for chassis grounds, and a few select places where I'll use paste to avoid overheating, or for SMD stuff. There is a local boy made good who made amps for Deathlock and other Adult Swim shows, and his first amps were modified Sovteks. Very nicely modified Sovteks!

great video - hope i didn't seem harsh on the vintage show comment, you gave us plenty of detail in this one!

My Johnson (Messenger II black face CB) still works too. Happy getting older day!

Happy birthday to you Teary hope you have a great birthday. I enjoy your videos veary much. Form Donald Hiscock from Vancover British Columbia Canada.

HAPPY BIRTHDAY, Terry! Wish Mine still worked.LOL

Great channel. Great people!! Thank you for your knowledge and entertainment 😎🤘🏻🎸

Happy birthday good sir. I hope you have many, many more. I'll have a drink to your health. Your friend Megan sounds awesome, much luck to her in her career.

Wow 535 volts to the plates is pretty 🔥.. I had an old sovtek 50 watt tube midget back in the 90s That thing is probably close to 60 watts RMS.. Ringed solder joints are the Big enemy of PCB boards and heat is another. I always look especially at those power tube sockets. Good video Happy Bday Terry

Happy Happy birthday Terry, just like vino you and your videos get better with age. I hope you have many more also tell Marsha to be extra nice to you, LoL

Very informative! You rule! Appreciate this so much!

Happy b-day!

I really love watching your videos and I have learned a lot, beyond just being satisfied that I could change tubes and bias an amp. You point out what's wrong, why it is causing the problem, and how to repair it and what parts to buy and where to get them. And you are a Godzilla fan to boot! I love Godzilla! But to be honest, I think the best Godzilla movie was the first one, it encompassed all aspects of the human condition against the backdrop of the emerging Cold War, not to mention it was scary as hell! My favorite, ( and yes, I think the most scary scene ) was when Dr. Yamane, with his daughter and his team, with Steve Martin (Raymond Burr) in tow, were on Odo Island, walking up the hill, and Godzilla appears, and as they all start to run, he lets out that vicious, bone chilling roar!

Happy Birthday my friend... I call today Doubler Wine Saturday. Terry, its very hard to be sure, but the right Filter cap looks like the top is slightly bulging. Very hard to be sure so mentioning it just in case. The bias adjustment was very thoughtful by the manufacturer to put there.. that's a good DLAB product enhancement to see make and sell... :P hint hint... Happy birthday bud...

Happy Birthday T-man! Hope you found a nice ‘07 Duckhorn Cab or similar to celebrate 🎉 🥳

Happy Birthday Young Terry! (Must be pushing 30 this year!!) ha ha!

I have a Mig 60 and its recommended bias on schematic is 80mv, which is ihe same parallel config as the Mig50, so 40mv per tube. . But I think it uses EL34s so.....but looks like you found the answer from them and yours is 62-65mv. So I'll shut up now. Haha. You're the best! Cheers Komrad! Salute!

You got a nod for recording track 10 on that CD. Cool!

happy birthday to you you old phart .. tnx from another old phart ..jeff

Good job old man.... :-) (that's a Happy Birthday) :-)

Great amp, I have two of those, very clean, the best pedal platform

Nice job!

Thanks

"FELIZ CUMPLEAÑOS TERRY"

Happy birthday Terry! Having been a metal fabricator and welder my whole life, ironically, I had never messed with soldering before. You inspired me to buy a soldering iron and some rosin-core solder to start doing my own guitar pickup swaps. So far, so good. Definitely a learning curve involved, but once you get it figured out, it’s all gravy. One of these days I need to send you my old mid 90’s Marshall Valvestate VS100R That I’ve had for over 20 years, that has mass-amounts of hum, even in the clean channel, and some of the input and output jacks need replacing or cleaning. And I want to convert my MIM Fender Princeton 65R 1x12 combo into a tube Hot Rod Deluxe w/ KT77 tubes, and 12AX7 preamp tubes. What do you think the estimated cost might run for those? I know actual cost will vary, but just wanted to get a rough ballpark number.

Awesome 😎

Happy birthday there, Dexter! (If you'll allow me some constructive criticism, the company in question pronounces their name, 'har-MON-nix')

Happy belated birthday! (Im a day late lol still counts)

13:20 - Those test-points are a plus. Just make sure you don't short the probes to the chassis! Happy '39th' birthday :)

A very Happy Birthday Terry. Really enjoyed the amp repair. Man that Johnson shirt is awesome! I have to get me some made. Need to start the cosmetic restoration on my two Viking II's soon. But in the mean time got a Apache TX-1 on the bench with no audio. Have a great week end.

Terry, hello and Happy Birthday belated. I thought that bias feature was really neat and thoughtful how the company put that on the back. I was intrigued they bias both tubes through a single circuit rather than biasing each tube separately. I do understand cost is involved though. So unless you do some probing and calculations a person won't know if each tube is truly biased equally. I mean, sometimes tubes aren't matched. Is this a correct assumption? Anyway, it is still a nice feature. I enjoy your videos and am learning through them and others.Reading books as well to possibly have a small repair shop to supplement my retirement income when that happens, shortly. Thanks, Kirk Murphy

I say the power supply caps probably won't give you much trouble but I would still replace the rest of the electrolytics with better quality ones.

Well, happy birthday! You are almost a Libra, my own sign. (But to be completely honest, I give no credence to how the stars were aligned when I was born, because that would be just silly.)

Happy BDay Terry! Enjoy some 14Hands tonight. Keep the Johnson happy! HA

Happy Birthday Terry, love Da Johnson’s too!! Question: because of all the cold and non-existent solider joints and with those being double sided boards why did you not unplug the wires and pull the boards to check both sides?? While I know it’s a huge pain it would be a much better observation and chance to confirm every joint is properly soldiered eliminating bad joints.

Happy Birthday! Have some wine ( I'm sure that's already happening) ';^b

WOW! That CD you promoted really rocks (wink, wink)! Thanks!

Happy birthday, man. I wonder what year you're at and...how that amp sounds?

I see a Sencore SG-165 in the background. Have you used it on any of your repairs/ restorations? How about a video of it in use? Happy Birthday!

I'm betting the schematic you found was for the older ones that were made and distributed by sovtek. The new EHX ones have a completely different layout and I bet they added the bias section.

HAPPY BIRTHDAY!! Sovtek made these amps, there is labeled Sovtek Mig50 as well as ElectroHarmonix... But I don't know if at one time they transfer the production in USA?!

Happy belated, Terry! Looks like a bad wave-solder job. Either they didn't get their flux spray right, or ran the conveyor too fast. The tube sockets would have been masked off for wave with Kaptan tape, and done with selective solder or manually soldered after all of the top layer components went down.