Marshmallow's build thread

[Marshmallow]

2 circuits completed. Biased and tested.

Had one wire issue but a coax sorted it.

[Marshmallow]

So making new adjustments. I'll try to get sound samples in the next few days.

40W tube rectified amp with 6L6 tubes,high-tension bias tremolo circuit from the Princeton Reverb. Still making mods but after playing it for some time, its very warm, organic tones with a versatile low to mid-gain range. The clean tones are rich and sparkly and can easily shift to mid-gain, while maintaining a smooth, Dumble-like texture and the articulation of a Jim Kelley amp. I guess it can adapt to any style and still have that unique voice. I really like this amp so I'm building a 20w version of it using an old classic tone output (6v6)

[jeremyb]

Oh man can't wait to hear some tone samples, what speaker do you think you'll pair with it???

[robthemac]

So making new adjustments. I'll try to get sound samples in the next few days.

40W tube rectified amp with 6L6 tubes,high-tension bias tremolo circuit from the Princeton Reverb. Still making mods but after playing it for some time, its very warm, organic tones with a versatile low to mid-gain range. The clean tones are rich and sparkly and can easily shift to mid-gain, while maintaining a smooth, Dumble-like texture and the articulation of a Jim Kelley amp. I guess it can adapt to any style and still have that unique voice. I really like this amp so I'm building a 20w version of it using an old classic tone output (6v6)

Is that a Dumble flavour tone stack and MV set-up too?

[Marshmallow]

Oh man can't wait to hear some tone samples, what speaker do you think you'll pair with it???

Hey man sorry for the late one. Got busy again with another order haha. I reckon an altec 417!

[Marshmallow]

So making new adjustments. I'll try to get sound samples in the next few days.

40W tube rectified amp with 6L6 tubes,high-tension bias tremolo circuit from the Princeton Reverb. Still making mods but after playing it for some time, its very warm, organic tones with a versatile low to mid-gain range. The clean tones are rich and sparkly and can easily shift to mid-gain, while maintaining a smooth, Dumble-like texture and the articulation of a Jim Kelley amp. I guess it can adapt to any style and still have that unique voice. I really like this amp so I'm building a 20w version of it using an old classic tone output (6v6)

Is that a Dumble flavour tone stack and MV set-up too?

Something like that! Had bright, mid, deep boost. Mv is a ppimv like dumble amps. Tried it at the shop the other day and it sings. Plenty of harmonic for a single channel and the breakup is so smooth but also aggressive. I'll take it to the shop tomorrow again and actually record.

[Marshmallow]

Just finished drawing the CAD and ordered the chassis for:
Trainwreck
ODSR
TRJM
PLEXI
and for my 10w custom.

All amps will be 50w.
Amps completed:
Ultraphonix/3wpreamp/jim kelley mix with reverb and trem 40w
TC custom reverb 40w
Single channel deluxe reverb with minor ultraphonix values 40w.

I may sell the single channel deluxe reverb 6l6 to make space. Tc custom reverb and ultraphonix mix spoken for.

[MikeC]

Does cost increase greatly per chassis getting 1x verses getting 10x?

[Marshmallow]

Does cost increase greatly per chassis getting 1x verses getting 10x?

Just a bit but not a lot. It's usually the cad processing that adds a bit more haha

[MikeC]

Does cost increase greatly per chassis getting 1x verses getting 10x?

Just a bit but not a lot. It's usually the cad processing that adds a bit more haha

Good to know

[Marshmallow]

Hi All, sorry been radio silent.



Picked up the chassis.
ODSR-Trainwreck, two rock jm - custom 10w, custom 22w, custom high gain amp.

[MikeC]

Looks like your weekends are gone again...

[Marshmallow]

Looks like your weekends are gone again...

Yes...

Quick update, I've been busy building amps the past few weeks. I now have 4 different amps with 4 different voicing, 3 different circuits one chassis design

Amp 1: Ramsays amp (green board) Voicing specific for ramsay
6v6 rectified. Bias trem, reverb. Switches: bright, pab, sweep, trem

Amp 2: 40w Ultraphonix. Worked on the schematic with a few amp makers e.g. tone geek, ampguy etc. 6l6 rectified.
Bias trem, reverb. Switches: bright, pab, sweep, trem) fx loop

Amp 3, 20w Ultraphonix Custom (own values). Has more sustain and more bloom.
Switches: bright, mid boost, 3 way pab (not full bypass) sweep, trem) fx loop. Bias trem, reverb. My current favourite.
Front: Controls - Volume, TMB, MV (Dumble style), Reverb, Tremolo speed, TR intensity.
Back: Dwell, Impedance selector

Amp 4
Deluxe Reverb single channel modified - This has the switch mods and also modded to run 6l6.

Unfortunately 2 of the amps are going out today. One to America.

[MikeC]

Crikey!

[bender]

Amp 2 and 3 sound SUPER intriguing!