Page 1 of 2

Marshmallow's build thread

Posted: Fri Apr 26, 2024 8:58 am
by Marshmallow
Figured I'd kick off a fresh thread to mark the new chapter in my building journey. With a new country comes a new approach, right? :lol:

Thanks to friends who chipped in with power tools, and with a decent job, I'm all set up to make amps for myself without having to sell them. Also got a bunch of these electrical wires from a good friend.

Few projects coming up, I'll start with the more boring ones. Build approach is still based on what I did in Japan. I completed this amp about a month ago or so ago using one of the chassis I brought with me from Japan. This build combines elements from different circuits: it's got the reverb circuit from a Custom Reverb, the preamp from a Two Rock JM amp, and the OD section from a #60. The result? Pristine and touch sensitive cleans and OD. OD is raw and the reverb circuit is the cleanest circuit I've heard in a while.

Will post gut shots in the next few days (If i remember)

Few minor details:
Gain Structure switch
Footswitch
Negative Feedback
2 parallel speaker outs with impedance selection (4,8,16)
Effects Loop
Individual bias test points.
2x 6l6,
Hammond PT, OT, Reverb and choke.

Tolex, grille and corners from LiveSound, running JBL E120.

Image

Image

Image

I'll try upload build processes here as I go.

Re: Marshmallow's build thread

Posted: Fri Apr 26, 2024 9:38 am
by MiniForklift
Look awesome, always impressed by your work. So are you back in NZ now?

Re: Marshmallow's build thread

Posted: Fri Apr 26, 2024 9:54 am
by StrummersOfThunder
Rad sounds like a cool amp
Wouldn’t mind doing a demo on it

Re: Marshmallow's build thread

Posted: Fri Apr 26, 2024 11:48 am
by jeremyb
Sounds beyond rad!!

Re: Marshmallow's build thread

Posted: Fri Apr 26, 2024 2:01 pm
by JoeBlow
I want to hear it 🔊 The description sounds great.

Re: Marshmallow's build thread

Posted: Sat Apr 27, 2024 9:55 pm
by robthemac
StrummersOfThunder wrote: Fri Apr 26, 2024 9:54 am Rad sounds like a cool amp
Wouldn’t mind doing a demo on it
Double forum demo in Northland.

Re: Marshmallow's build thread

Posted: Wed May 01, 2024 9:39 am
by Marshmallow
Keen for a gearfest!

Re: Marshmallow's build thread

Posted: Fri May 03, 2024 8:11 am
by Marshmallow
Recently acquired a collection of NOS parts yesterday dating back to the 70s. Enough to last me many years of amp making. From Philips resistors, Yellow mustards, Matsushita and National capacitors, terminals, fuses, solder, solder stations etc. A shop was closing down and I picked what I needed for a fraction. Pretty good deal I must say. Time to start building I guess.

Image

Image

Image

Re: Marshmallow's build thread

Posted: Fri May 03, 2024 8:22 am
by jeremyb
Shit a brick, score!

Re: Marshmallow's build thread

Posted: Fri May 03, 2024 8:24 am
by robthemac
Epic.

Re: Marshmallow's build thread

Posted: Sun May 05, 2024 11:52 am
by Marshmallow
Thought I'd share this as well. 5e3 style circuit - 20w (classictone PT), SS rectifier, 6v6 with minimal wire crossover.
Yellow mustart caps, industrial wiring. individual bias test points and single ground.

Image

Image

Re: Marshmallow's build thread

Posted: Tue May 07, 2024 7:45 am
by Marshmallow
Here's another 5E3 with robinette mods and bigger chassis.

Been enjoying these smaller amps lately. Maybe I'll try a gibson circuit haha.

Image

Image

Re: Marshmallow's build thread

Posted: Tue May 07, 2024 8:16 am
by jeremyb
I wouldn't even play that, I'd just leave the open chassis on display as art.

Re: Marshmallow's build thread

Posted: Tue May 07, 2024 8:28 am
by MikeC
Marshmallow wrote: Fri May 03, 2024 8:11 am Recently acquired a collection of NOS parts yesterday dating back to the 70s. Enough to last me many years of amp making. From Philips resistors, Yellow mustards, Matsushita and National capacitors, terminals, fuses, solder, solder stations etc. A shop was closing down and I picked what I needed for a fraction. Pretty good deal I must say. Time to start building I guess.

Image

Image

Image
Phwoar, where'd you "aquire" these?

Re: Marshmallow's build thread

Posted: Wed May 08, 2024 10:49 pm
by Marshmallow
MikeC wrote: Tue May 07, 2024 8:28 am
Marshmallow wrote: Fri May 03, 2024 8:11 am Recently acquired a collection of NOS parts yesterday dating back to the 70s. Enough to last me many years of amp making. From Philips resistors, Yellow mustards, Matsushita and National capacitors, terminals, fuses, solder, solder stations etc. A shop was closing down and I picked what I needed for a fraction. Pretty good deal I must say. Time to start building I guess.

Image

Image

Image
Phwoar, where'd you "aquire" these?
Axcent Audio! My mate jeremy was working there. They fully sold the business I think and had to clear out.