Kelly 50 Watt Guitar Amp Head Power Transformer Calamity Repaired at Bodge it and Scarpers
ฝัง
- เผยแพร่เมื่อ 18 ก.ย. 2024
- Kelly 50 Watt Guitar Amp Head in for a service. This turned out to be much more than a service.
We discover that someone has previously changed the power transformer on this amp. What unfolds next when we delve in this amp is farcical.
Electrical tape isn't an electrical insulator, it's used in conjunction with string, cord or rope when pulling cables through a conduit pipe.
Hello. A perfect explanation. Take care.
@@vintageguitaramp_guitarteacher I used to be a Telecom cable-puller. The shoulder and back problems I now have in old age are likely due to having pulled many thousands of miles of cable through thousand of miles of drop ceilings and conduit pipes!
John Kelly was the Selmer factory service/repair man who left Selmer in around '67 to build these amps with two of three other Selmer employees.
I've seen ones that have the "croc-skin" coverings and are very well built, they where building the Selmer line just at a much smaller scale, I think the company folded in the late 70's?.
Solid built amps for sure!.
That "toroidal" transformer looked a right state, obviously not original!.
That's good info Keiran, thank you. Amp is nearly ready. The volume pot/switch arrived today. Take care.
@vintageguitaramp_guitarteacher
That's great Martyn, looking forward to it,
Thank you.
Seen (and managed) that before, just loosen the center screw of the Toroidal Transformer and you can pull it out...no drama.
Hello. I got there in the end and looking through a camera is a pain when you taking something to bits. I have to have some entertainment on the channel and some people got a laugh out of watching me, which is good. I must admit I am not a lover of drama and you don't get much of it on this channel. A bit is okay as long as makes people laugh. Thanks for watching and take care.
Kind of reminds me of a Fender amp I had here at the shop............ YEARS before I saw it, someone bodged in a random transformer. The customer who bought it and brought it to me said "it doesn't sound like a Fender".......... I put an appropriate transformer in it, and things went back to normal.
Hello. That's a good point. The transformer coming from Modulus Amplification should be spot on. I watch your channel when I can find the time in between work. You have some really good stuff on there. Thanks for watching and take care.
I’ve nearly pulled the trigger on one of these a few times.
They are good amps once they are running right. Take care.
So as well as repairing amps, you’re also a mechanic. Can you have a look at my car ?😂😂😂😂😂
After fixing all these Billy Bodger amplifiers, I'm certain Martyn could properly rewire any vehicle built with electrics by Lucas (aka the Prince of Darkness)!
Hello John. Yes if you no longer wish it to run anymore. Having said that I did work on cars when I young But they were simple things to work on in those days. Take care John.
@vintageguitaramp_guitarteacher too true Martyn. I remember in the 70's I used to work on my dad's Cortina. Even changed the clutch and gearbox once. Nowadays cars ain't made for us mere mortals to work on.
Great amplifier.
Hello Marcus. It will be when It's all sorted out. Thanks for watching and take care.
Like it says in an old blues song, "one monkey-wrench don't stop my show". 🤣
By Dave Spanner and the Four Sockets!!
@@vintageguitaramp_guitarteacher , The band's biography is titled "a Spanner in the Works!"
@@vintageguitaramp_guitarteacher , "Steely-eyed Spanner", anyone? 😁 (Not too many people in the States are familiar with Steelyeye Span as I am; Steely Dan, yes.)
If there's a wire in the output transformer that doesn't seem to be attached to anything electrically, perhaps it's an electrostatic shield inbetween the primary and secondary? (should get tied to chassis ground). I've seen them in power transformers but I don't recall if I've ever seen one on an output transformer. Otherwise, whenever a transformer seems to have extra wires that you don't expect, it's usually either an ultralinear type primary with screen taps, or maybe it's a PA-amp transformer with extra output taps for distributed sound at 25 V or 70 V or 500 ohm.
Oh brother ! That reminded me of a current model prestigious British 4 wheel drive Chelsea tractor. If the turbocharger goes tits-up, the only way it can be got at is to remove the bodyshell from the chassis. Before you open your chequebook you must ask yourself ; Will the mechanic find something else wrong, like a seized engine that had it's oil eaten by the faulty turbo ? Would the cost of that (extremely substantial) warrant starting any risky repair plan that would not increase the resale value or has the vehicle become a parts donor ? Your a good man Martyn for taking on that Kelly amp !
Hello Pete. That sums it up perfectly. I like a challenge. Take care Pete.
..wouldnt want the bill
Worth doing tho..
Very entertaining ha!
You get all the good jobs
Red n yellow caps are meant to be reliable unless cracked in middle..so ive been told
Put in the museum
The Six million dollar amp. An amp barely alive. We can rebuild it 😂😂😂😂
ja ja ja ja jiggle it a bit Grenville
Hahaha, I'm not sure who'll get the reference?.
You have to be "open all hours" to get it!.
Unbolt the transformer then pull the chassis out.
Hello Rob. I got there in the end. Looking through a camera slows down the process lol. Take care Rob.
Cut those cable ties, get them out the way. You said the toroidal transformer is going, then unsolder all the wiring, pull it out.
Thank you for this video!Really looking forward to part 2! Out of interest, does this have a cathodyne phase inverter (like a Princeton Reverb) or a long tail pair like a Selmer TnB mkii onwards? Thank you.
Hello Martin. It's a long tail pair I think. I will check in part two. Thanks for watching and take care.
@vintageguitaramp_guitarteacher Thanks Martyn, looking forward! I am curious if the schematic I have matches this one!
You could always build a tube hifi amp with that transformer. Is it just a coincidence that it's marked 5150 like the Peavey EVH amps?
I don't think I would not want to build anything with it. There is no telling what it has been used for in the past. Take care.
He must have thought replacing the plessey bypass caps would spoil the tone!
Hello Alan. My thoughts exactly. Take care.
Pink's gotta hog the stage and be in the limelight!
Hello. Always!!!!!!!!!!!!!!!!!!!!
Flip it with the trans on the top. You'll need to angle the chassis and pull
Hello David. I tried that too. Some parts were edited out due to me swearing lol. Take care.
What a struggle, just to get the chassis out! Not exactly the best thought nout repair, was it?
Hello Steve. Yes, Measure once and cut twice. Take care mate.
What's wrong with the transformer, except it was mounted inproperly? There is nothing wrong with toroidal transformers. If the values are correct, it could be mounted 2cm towards the center of the chassis on a plate that covers the oridinal transformer hole. There is enough room towards the choke.
Hello. You are right. There is nothing wrong with toroidal transformers. I just get annoyed when people botch up vintage amps. It probably came across that way. I am sorry if that was the case. I have had a string of botched repairs to sort lately. I love working on old amps but I am ready for just a simple repair. I want to try to put this amp back as close to original as possible. I don't know the history of the toroidal either, or what it's been used for in the past. The guy took no pride in fitting it. So who knows. Once I open it then my name is on it. I will take pride in repairing it. It's a fair point you have made and the channel content should only be based on facts. So thank you. Take care Lothy
@@LothyBluesCave reminds me of the transformers in the HH 1OOw solid state amps
Loosen centre bolt ?
The bolt probably relaxed and the transformer shifted a little bit when the amp was being transported, wedging the chassis into the cabinet.
@@goodun2974 I think that the 'wedging' was part of Billy's transformer location solution - the centre bolt just held the transformer to the plate - nothing held the plate to the chassis !! A narrower plate could have given the removal clearance and using the old transformer fixing bolt holes could have secured its situation. Another 'expert' who went on to work on the Titan Submersible I wonder?
Hello Trev. I got there in the end. It takes longer looking through the camera. Take care.
Hello. Yes. I think you are right. Take care.
Psh the top in and pull the bottom out
I tried that. The only way to get it was to remove the transformer. There was just enough room to get to the blot. Thanks David. Take care.
Anybody got a crowbar?
Hello Chris. I better keep one on hand from now on. Take care