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Small Tube Amp Build - Step by Step (3 - Turret Board, Filament Wires)
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- čas přidán 28. 01. 2018
- Update Dec 5 2020: GT5 Plans (TB and TMB models) now available@: www.elamscafeboutique.com/shop
If you would like to download the plans, visit elamscafe.com/product/build-y...
Mark II Version now available in comprehensive Full Plans Pack.
About 5 seconds into the video, and I have already seen some of the most impressive wiring I've ever come across.
Really appreciate it, thank you!
My wife walked by when you said,”nicely swaged, nothing like a good old swaging”. She thought that it was very funny, and she agreed with you, cheers.
Ha ha, that's funny, thanks for commenting, much appreciated!
Very nice and neat work. Looks beautiful already. Thanks for sharing!
What a perfectionist! Amazing work.
it is so relaxing to watch during work :D
Super tidy, such attention to detail and craftsmanship, I enjoyed watching it and I think I've learned a few things. Excellent 👌
Thanks TDM, really appreciate the kind words, glad the vids helped. Cheers
Beautiful workmanship! I appreciate the way you kept the filament supply running hard against the chassis. I may have missed it, but it could benefit your viewers to explain why this is important, along with the twisting. You deserve the Double Gold star for terminating your pushback wire with heatshrink. Excellent build.
Thanks TGAT! Really appreciate the kind words. I'm about to build the addition to this wee amp, that is, same amp with TB tone stack. Ill certainly go into the theory a bit more. Cheers!!
elams1894 I’ll definitely be looking forward to that next video!
Thank you for this most excellent video. Best job of filming, clear explanation, and useful information I've seen. There are close-ups and very clear explanations. Thank you for sharing your knowledge and experience.
Thanks Michael, appreciate the kind words!
This whole series is so beautiful and informative, thanks for sharing it
No probs, glad it was of help, cheers
I thought the bug was actually crawling across my monitor. Thanks for pointing it out before I began swatting the screen. Also... your wooden mallet looks like a gnarly murder weapon. \m/ Awesome video Bud!
5:45 that's right lol, it's so satisfying, I got a train rail anvil at the ready
Fantastic job.
Very informative. Nice techniques!
Great build
And demonstration
Thinking of building a tube amp for my Blues Harmonica
Not sure if this is beyond me but I’m enjoying watching you build
These videos are sooo goooooood!
A lot of mystery solved. thx
nossa curto de mais este tipo de conteúdo parabéns amigo muito bom
'Wash your hands before touching this nice white cable' Haha!! And that my friend is why your builds are always a work of art! :O Details like this, that I would never dream of doing.
Always good to see you uploading mate :)
Yo dude!! Thanks for tuning in again, hope you doing all good and still rocking the live gigs! Indeed, the devil is in the detail he he, cheers!
Beautiful work. Super neat. Your filament wires on V2 may be unnecessarily twisted. Because there are the same AC voltage, there is no advantage to twisting.
Geoff - really great series so far, I appreciate the work you've put into this. What did you use there for a swaging tool? Just some steel round stock filed to a point, or was it something fancier? Also the stanley drill alignment tool you used in the chassis-building vid -- does it have a name/number?
Looking very nice. I like these boards.
I would advise you to raise the filament wires from the chassis. Laying them on the chassis can introduce hum. Best is to let these float in the air, a few centimeters from the chassis, towards the tube and then bend them 90 degrees downwards to the tube.
Thanks Joost! Thanks for the tip, nice!
That's how Fender used to do it.
My God, you OCD is bringing a tear to my eye
Yeah, it's probably a curse more than anything. I have a real problem in that regard ha ha, cheers!
15:40 you'r twisting 2 positie wires together, thats wrong it should be a positie and a negatieve fillamemt wire to reduce hum in the circuit
Very true, good spotting. Not sure how I screwed that up at the time but I corrected it in the next video, cheers.
I love your technique and attention to detail. I'm curious: Why do you keep the heaters close to the chassis? It seems like flying them downward toward the tube socket could induce less noise from AC heaters. I haven't A/B'd these techniques, however, and I trust your input on this matter.
Yes indeed you can bring them down from a vertical position and it's a great way to do it. My father does it this way too, every time. I find that heater wires in vertical position gets too busy around the tube socket for my liking. I end up touching the insulation with the iron and for that reason, I like to position the heater wires as far out of harms way as possible. If you can manage heaters in a vertical manner, then that's fantastic. I'd wager it's probably a superior orientation, however if wires are twisted and connected correctly, there would be not too much difference. Cheers.
Wow. #wiringporn Great video.
8:54 I'll first watch
very, very good works ! Bravo ! in France !
Thank you Vincent!
Lovely vid! What tool did you use to swage the turret bases at 5:35 ?
What is the size/dimension of the turret board? Just as it prints on a 8.5x11 piece of paper?
I had a leaking floor in my bathroom, and I rent so they came in to replace the floor for free right, and they had to protect my floor in my appartment and they used these mdf plates which they taped on the floor, I asked them afterward whether I could keep the mdf plates, figuring they'd come in handy someday, well
Nice clean work, does it really make sense, to color en seperate the filament wires in a AC configuration?... so that pins 9 is always has the same wire and so for pins 5 the same?
Thanks. To answer the question, yes it does matter what pins, and how it is twisted.. That is because if you get the pins mixed, you dont get any cancellation. You could rectify the AC, in that way, it would not matter. However with twisting, it absolutely matters. Cheers
elams1894 Thanks a lot, this helps me further in thinking how to prevent ac hum as much as can. In a diagram of an old circuit i'll have to feed the 12ax7 heaters, it shows pin 4 & 5 are connected simply by 1 filament wire to both (like a bridge) and pin 9 got the other, is that something to think about? Cheers mate
Ah I see video 5 right now with the explain 😁👌🏼 Great work!
I would just make up a bunch of twisted pair with a hand drill or electric screwdriver and forget about polarity for the heaters, aren't they AC anyway?
The drill trick is a good one, I've never used it for solid core, and I'm not sure why now actually come to think of it. The heaters are ac however I believe opposite sides of the secondary winding need to be twisted to get hum cancelling. If the same sides of the winding are twisted there is no hum cancelling. I'm still trying to figure out current flow in my head as a result of my first configuration. AC theory is a tricky one indeed.
hi where you buy your cable and what is the name of cable ! good job thanks
I use this cable for making my own shielded hookup cable. 22awg tubedepot.com/products/22-ga-tin-plated-aerospace-grade-tefzel-wire-100-feet
For all my solid core cable, 20, 18awg, I source from RS online. It is their tinned bus cable. I get it in rolls. I also have a collection of vintage cable I get from local auctions. Cheers
Get those small pointed jewelry pliers from hobby store put the point of the pliers into the turret top hole and it will wrap those bare wire ends around the turrets.
Man, I didnt find the video that you teach how to build the board
hey jeff good to see the next installment. i have brought the full pack and have being going through the parts list everything looks ok apart from the transformers is there anything that subtitues the power transformer?
+clint taylor Hi clint, you can use any power transformer that has from about 520-550v secondary or there abouts. Also you need separate 6.3v secondary winding for the filaments as well, but most will have that. If they have more secondary windings, you just terminate them and don't use. The transformer out of an old NZ Bell Colt radio is perfect for this build actually. You just need a 5-10 watt output tranny, if it has the 4, 8, and 16 ohm taps then you are sorted, if only one, then make sure the speaker is the same ohm rating, all good.
I think I might have just the thing. thanks for answering all my questions
5:48 nothing like a good old swagging. Yeah! Sexy! Thanks for the whole series, it is fantastic!
Thanks 331B!
HI! Thanks for making these videos! Question: I would like to build a version of this amp for bass, which mods would I have to make to it in order for it to work well?
I guess for a bass amp, you would prefer a clean signal? If you only require a clean signal you could try and modify the gain stages so that you do not get any distortion. A JTM45 preamp circuit would be the best place to look. Cheers
Super sanitary!
Thanks Greg!
Swage - Is it pronounced "SWARGE" or "SWAYGE". You seem to like the former, but I've always thought it was pronounced the latter.
+BEAVIS Motorsport I'm not completely sure to be honest, my forefathers always pronounced t swarge so it stuck I guess, however they are Scottish in origin so the jury is out in figuring out that accent ha ha..
Fair enough. I have no interest in a tube amp, but I truly enjoy your intricate work and attention to detail so I find your videos a real treat. I started watching back when you built the carbon gimbal - wow that was a fun watch.
Definitely 'Swayge'.
www.google.com.au/search?q=Dictionary#dobs=swage
Maybe 'Swarge' is a Kiwi thing? ;-)
I'm guessing New Zealand accent. E's sound like I's. I's sound like U's. A's sound like E's. I like it. Nice work also!
Nah mate, you're doing it wrong. I've seen inside factory made electronics, so I know what's what! The wires have to be formed into a rats nest and then be crammed into the case.
Seriously thoough, nice job on this tutorial series.
Thanks cm! Nice comment, aint it the truth ha ha..
I guess Im pretty off topic but do anyone know a good site to watch newly released series online ?
@Maximo Mario i watch on Flixzone. You can find it by googling :)
@Hank Javion definitely, I've been using Flixzone for since april myself =)
Is this a stupid idea for a noob with no knowledge? I really wanna build one