creation audio labs mk 4.2.3 boost killer looking box

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.
Post Reply
polarbearfx
Resistor Ronker
Posts: 312
Joined: 27 Sep 2007, 12:14
Has thanked: 5 times
Been thanked: 4 times

Post by polarbearfx »

sounds pretty good. A little bland. But good. what do we got here? anyone have one?

indyguitarist
Resistor Ronker
Posts: 379
Joined: 11 Jul 2007, 03:25
Been thanked: 142 times

Post by indyguitarist »

polarbearfx wrote:sounds pretty good. A little bland. But good. what do we got here? anyone have one?
yes - an artist I do work for has one. I haven't opened it up yet, I just assumed it was a general transistor boost with a step up circuit for the voltage.

I may be back to work on his gear in a couple of weeks, I'll try to get a chance to open it up and take some pics front/back.

bw

Bernardduur
Transistor Tuner
Posts: 1146
Joined: 24 Aug 2007, 08:36
my favorite amplifier: Welagen - ODR
Location: Losser.........
Has thanked: 83 times
Been thanked: 507 times

Post by Bernardduur »

Any idea yet?
'No more....... loud music.......'

User avatar
soulsonic
Old Solderhand
Posts: 3662
Joined: 27 Jun 2007, 04:38
my favorite amplifier: Stopped using amps mostly...
Completed builds: too many!
Location: Cortland, NY
Has thanked: 67 times
Been thanked: 155 times
Contact:

Post by soulsonic »


Goop alert!
"Analog electronics in music is dead. Analog effects pedal design is a dead art." - Fran

User avatar
soulsonic
Old Solderhand
Posts: 3662
Joined: 27 Jun 2007, 04:38
my favorite amplifier: Stopped using amps mostly...
Completed builds: too many!
Location: Cortland, NY
Has thanked: 67 times
Been thanked: 155 times
Contact:

Post by soulsonic »

Also, this video gives me a damn headache. This guy ruins a perfectly good switch to repair the broken one, instead of taking time to desolder it from the board. Just awful to watch.
But it gives you a good view of what's inside this pedal.
"Analog electronics in music is dead. Analog effects pedal design is a dead art." - Fran

User avatar
Intripped
Cap Cooler
Posts: 538
Joined: 25 Aug 2009, 02:03
Location: Italy
Has thanked: 623 times
Been thanked: 206 times

Post by Intripped »

yeah definitely this guy is irritating

User avatar
rockola
Posts: 16
Joined: 09 Oct 2014, 11:33
Location: Helsingrad, Finland the funland
Has thanked: 19 times
Been thanked: 1 time

Post by rockola »

The video is also illuminating. I've never cracked open a 3PDT, I had no idea some (all?) of them are that flimsy.

Ben N
Resistor Ronker
Posts: 371
Joined: 12 Dec 2008, 04:34
my favorite amplifier: Ampeg J12D Jet
Location: Israel
Has thanked: 25 times
Been thanked: 16 times

Post by Ben N »

Flimsy? I dunno. They're not the greatest, but they work well enough for me, certainly for a $2.60 part, and unlike the old Carling x-types, they don't melt at the mere sight of a soldering iron. It looks to me like ole Brad was bad mouthing the switch to justify his own ham handedness. The switch is not intended to be serviceable; the body has no problem handling downward pressure when you don't first pull it apart. Still, it was cool to see it done--a lot more interesting than if he had simply done the sensible thing and (a) ordered the pcb mount version of the switch, instead of the solder lug version, and (b) removed it and installed the new one, like soulsonic said.

Circuit-wise, though, I can't imagine what might be interesting about this thing. It seems to me that anyone marketing what is almost certainly a bog-simple, bog-standard textbook circuit or a very close variant thereof has got to goop (not to mention put it in an enclosure several sizes larger than necessary), or else admit to the world that there is nothing to see here, and certainly nothing to justify the $150 price tag. Got to save the mojo.

User avatar
deltafred
Opamp Operator
Posts: 1493
Joined: 06 Apr 2010, 17:16
Location: England
Has thanked: 320 times
Been thanked: 204 times

Post by deltafred »

It's a pretty dumb idea cracking open a switch that is machine crimped and hoping to get it back together as tight with a pair of pliers.

Yes it's a PITA desoldering 9 connections but if you want to repair stompboxes it's something you have to learn how to do.
Politics is the art of so plucking the goose as to obtain the most feathers with the least squawking. - R.G. 2011
Jeez, she's an ugly bastard, she makes my socks hurt. I hope it's no ones missus here. - Ice-9 2012

Ben N
Resistor Ronker
Posts: 371
Joined: 12 Dec 2008, 04:34
my favorite amplifier: Ampeg J12D Jet
Location: Israel
Has thanked: 25 times
Been thanked: 16 times

Post by Ben N »

deltafred wrote:
20 May 2020, 12:03
Yes it's a PITA desoldering 9 connections but if you want to repair stompboxes it's something you have to learn how to do.
Not with a half decent rework tool.

lead2203
Breadboard Brother
Posts: 80
Joined: 02 May 2009, 03:09
Has thanked: 1 time
Been thanked: 10 times

Post by lead2203 »

This goof recently took apart ..."to fix"...haha ...one of those Vox mini amps with the nutube. It's hard to watch. In the end he blamed the manufacturer for his inability to fix it. If you try to give him any constructive criticism or help in the comments, he just deletes it. The guy annoys the sh*t out of me. YouTube has been a blessing and a curse for humans...haha.

User avatar
soulsonic
Old Solderhand
Posts: 3662
Joined: 27 Jun 2007, 04:38
my favorite amplifier: Stopped using amps mostly...
Completed builds: too many!
Location: Cortland, NY
Has thanked: 67 times
Been thanked: 155 times
Contact:

Post by soulsonic »

I just made the mistake of browsing some of his other videos... seems to be all about covid-19 conspiracies now... guess this is what I should expect from a person who pokes around the inside of a live tube amp with a bare finger while firmly hold the ground with his other bare hand.
I am now truly sorry for posting his garbage here. My apologies.
"Analog electronics in music is dead. Analog effects pedal design is a dead art." - Fran

User avatar
soulsonic
Old Solderhand
Posts: 3662
Joined: 27 Jun 2007, 04:38
my favorite amplifier: Stopped using amps mostly...
Completed builds: too many!
Location: Cortland, NY
Has thanked: 67 times
Been thanked: 155 times
Contact:

Post by soulsonic »

Sorry, to keep talking about this guy, but OMG, I just looked up that vox nutube amp video, and he keeps complaining about how Korg sent him (hundreds of $$$ worth of free nutube stuff) and he just can't figure out how to use it because the pin spacing doesn't match with a breadboard. The daughter card they sent with the eval board has exactly correct pin spacing for a breadboard! I wonder if Korg feels foolish for giving this idiot freebies with nothing in return except him slagging on their products because he's too stupid to be able to repair or use them.
"Analog electronics in music is dead. Analog effects pedal design is a dead art." - Fran

okgb
Diode Debunker
Posts: 814
Joined: 16 Mar 2010, 04:58
Has thanked: 176 times
Been thanked: 29 times

Post by okgb »

He's got that " common man " vibe and not afraid to look foolish [ I think or maybe he is ] probably appeals to the anti voodoo mojo expert I know, you don't know types.

Ben N
Resistor Ronker
Posts: 371
Joined: 12 Dec 2008, 04:34
my favorite amplifier: Ampeg J12D Jet
Location: Israel
Has thanked: 25 times
Been thanked: 16 times

Post by Ben N »

He's ok when he sticks to what he (more or less) knows--tube amps, preferably old ones on eyelet/turret boards (although even for those there are way better channels on Youtube). I like his dumpster diving videos. As for the Vox mini amp, that was bad butchery, but speaking from personal experience, the real fault is with Korg for their poor quality, "not my problem" warranty policy and general screw-the-customer attitude. Brad would never have gotten his mitts on that poor little thing if Korg had done the right thing.

User avatar
modman
a d m i n
Posts: 4551
Joined: 19 Jun 2007, 17:57
Has thanked: 3205 times
Been thanked: 666 times

Post by modman »

soulsonic wrote:
21 May 2020, 01:02
Sorry, to keep talking about this guy, but OMG,
... it's about him being an absolutely self taught part changer with no real knowledge. Just a DIY hack really, but somehow, he has the balls to film all his mistakes and keep you watching. But he is a youtube hit... beause of the sheer amount of vintage amps he 'serviced'
I can't watch this guy anymore, it's too frustrating to watch... especially when he digs into anything solid state. Bottom line, where I have a problem is: the Guitologist gives the impression he's making a living repairing and selling amps - I do not believe it. He's making money on youtube allright.
But his channel is a gem: he documented three different Tweed Deluxes, but mostly made videos about the cheaper amps, pa amps, series filament amps etc...

Good thing I found this guy -- but most of his videos are on facebook only:


Check the layout issue at 2:00

In the end, if you come across a rare amplifier (it need not be expensive) - what is your excuse for not documenting the unit on youtube for your fellow ampoholics, 5, 10 ....... years from now?

maybe I should split this topic :lol:
Is everybody now able to edit their own posts?
Please, support freestompboxes.org on Patreon for just 1 pcb per year! Or donate directly through PayPal

User avatar
plush
Resistor Ronker
Posts: 389
Joined: 08 Dec 2015, 10:29
Location: Moscow, Evil Russia
Has thanked: 27 times
Been thanked: 80 times

Post by plush »

modman wrote:
21 May 2020, 11:06
Good thing I found this guy -- but most of his videos are on facebook only:


Check the layout issue at 2:00

Oh, yer old magnetic coupling. How come, Marshall?..

Ben N
Resistor Ronker
Posts: 371
Joined: 12 Dec 2008, 04:34
my favorite amplifier: Ampeg J12D Jet
Location: Israel
Has thanked: 25 times
Been thanked: 16 times

Post by Ben N »

modman wrote:
21 May 2020, 11:06
... it's about him being an absolutely self taught part changer with no real knowledge. Just a DIY hack really...
Not so unlike some "professional amp techs" I have come across. Some common stuff he handles fine (finding bad solder joints, replacing electrolytics, cleaning pots and sockets, finding bad tubes); other stuff is like a car crash that you can't help but look at. I find it entertaining for the most part, at least when he's working on stuff.

User avatar
modman
a d m i n
Posts: 4551
Joined: 19 Jun 2007, 17:57
Has thanked: 3205 times
Been thanked: 666 times

Post by modman »

Ben N wrote:
21 May 2020, 20:18
modman wrote:
21 May 2020, 11:06
... it's about him being an absolutely self taught part changer with no real knowledge. Just a DIY hack really...
Not so unlike some "professional amp techs"
You are right... he's allright with amps as long as they are old school, Fender type. Seeing him deal with solid state is toe-curling -- like looking at myself in the beginning :D

I have a lot more problems with this alleged 'professional amp tech' Skip Simmons in that Fretboard Journal podcast... he only services old tube amp, admits not knowing how a transistor works, does not own a scope because he "did not learn that way", is not able to calculate a cutoff frequency for a filter and expresses his surprise that a small coupling cap in a cathode follower doesn't completely kill the signal, etc. etc. He thinks he has some information to share because of all the bullshit on the internet. Which internet I wonder.

For me, a DIY hack who learned everything online, this is just incredible... that he's making money. But is he really? He boasts (!) about not charging by the hour like the other guys... well that's absolutely correct if you don't want to learn to use a scope.

Maybe if you're a commuter, you can try these 2 hours episodes of yacking and waffling about anything really, but when an interesting question pops up the answer is always "we could be yacking about it all day, why don't you just try it"?
Please, support freestompboxes.org on Patreon for just 1 pcb per year! Or donate directly through PayPal

Post Reply