TUBE - TUBE REVERB - TUBE TREMOLO
Swart comments on his latest amplifier:
idea of the Atomic Space Tone hit me when I was working on a vintage
Gibson Scout guitar amp. It had Reverb, Tremolo, and 15 watts of pure
rocking vintage tone power but only three preamp tubes and two EL-84
output tubes. I thought to my self - I have never seen an amp that could
do so much with so little and sound surprisingly good. But I knew it
could be even better. I knew something could be built revolving around
my favorite little tone generator, the 6V6. I sent a note of thanks
to my cohort for the inspiration for one of the best amplifiers I have
ever built and the only thing I have found to equal the soul and amazing
tone of the ST-6V6se but with MORE power.
I call it the ATOMIC SPACE TONE. And damn if it's not a winner - this
beast sounds amazing.
This amp brings more tube soul than I thought possible, even compared
to some of my favorite vintage amps. We are talking ALL TUBE circuitry,
even the Tremolo and Reverb, all leading into the excellent 12"
Mojotone BV-25m speaker.
The heart of the matter - Atomic Space Tone Chassis with all tube circuitry
(now with high/low inputs) - Click for FULL view
I am actually so excited by this amp both aurally and visually. It's
the second in our Tweed Series which takes our excellent finger jointed
pine cabinet and covers it with top quality tweed, adding a lacquer
to give it durability and that vintage, timeless look. We then add
a rich, dark lacuer tweed on the sides which gives this amp a totally
distinctive appearance. When we play out with this beast, everyone
that "knows" comes up to inquire about the AST, this on
the sound AND looks. Just like the original ST-6V6se, there is nothing
out there like it.
The AC is cleaned and rectified
by the reliable JJ 5AR4, this a very robust tube providing excellent
sonics due to the total lack of solid-state circuits in the rectification
stage (SS rectification leads to a more hard/harsh tone and slams
the tubes on power-up causing excess tube wear). A heavy
duty, JJ 500V Surface mount capacitor is the mains filtering device.
Powered by Twin EH 6v6's
putting out 18-22 cathode biased Watts; the twin 6V6s seem to
really put out an amazing mixture of soul~tone. We love
this combo! (You can also sub 6L6s for a bit more headroom
due to the extra beefy Heyboer Power Transformer,
A 12AX7 does duty as the
driver and bias regulated Tremolo. Ever heard tube tremolo?
You will now. Simply put, if you're a tremolo fan, you won't
Reverb is all tube.
Tube Reverb is the only way to go and our implementation leaves
the competition sounding two-dimensional.
The first preamp tube is another
dedicated rocking 12AX7 to drive this beast to Mount St. Helens
and back. Our whole driver/preamp circuit has been
optimized from months of testing. The AST sings like
Custom built, Heavy Duty, power
and output transformers - HeyBoer USA - The New Leader
Carbon Comp Resistors for the
BEST tone. Period.
Mallory, Sprague and JJ Caps
- only the best, all considered for their appropriate roles
Finest silver tinned cloth
& Teflon covered wire
Hand Wired, point to point
Standby Switch - warm up |
extends tube life High and low inputs for high and low output
Dedicated 2-button foot switch
for reverb & tremolo
12" Mojotone British Vintage
And a hand-made, finger jointed
pine cabinet covered in light with dark tweed tweed side panels.
This cabinet is part of the magic of the Atomic Space Tone - We
tested many different cabinet configurations and wood choices
until we found the magic of the AST combo.
- Dimensions: 18" T x 15 1/2 W x 9 1/2 D
HEAR, and SEE Musicians with the Atomic Space Tone!
- click on each thumb below -
Also, please take a look at our new Atomic
Boost pedal -
Atomic Boost is a natural
with the AST!
- Click above for pedal details -
The combination of the Atomic Duo
has to be heard to be believed!
All Tube circuit ~18-20w twin 6V6 High Class A Biased AB
Can be powered by 6V6 or 6L6
Cathode "AUTO" Biased (no need
to bias for tube rolling)
JJ/Tung-Sol 12AX7(2) - JJ 12DW7 -
JJ 6V6 - JJ GZ34
Tube Rectification ~ GZ-34 or
NOS 5Y3 (See below)
Sub NOS 5Y3
for earlier breakup/increased compression
100% Tube Reverb & Tremolo ~ Quality Spring Tank
Hi/Lo Inputs for better PU Output matching
Hand wired point to point ~ Made in
Standby Switch ~ Amp warmed up|extends
Carbon Comp Resistors for BEST TONE
Mallory, Sprague, and JJ Caps selected for Application
Finest silver tinned cloth & Teflon covered wire
8 Ohm High Quality Custom Output
Dedicated 2 button foot switch included
Rubber Feet for Vibration/Protection
Solid, finger-jointed Cabinet ~ Lacquered Tweed
Standard with 12" Mojo BV-25 ~ Excellent Vintage Tone!
• Can fit Celestion Alnico Blue/Gold/Cream
1A Slow Blow 250v 3AG 1/4 x 1-1/4(30mm)
Dimensions: 18" T x 15 1/2 W x 9 1/2 D ~ 29lbs
This might be my personal "if only
one" Swart amp though nice not to have to make that hard decision.
Such a special beast. ~ kh
AST #1 with "oxblood" sides and single
- Click above for full -
Later run AST -
"HI" and "Low" Inputs with dark
Lacquered tweed side panels
- Click above
for full view -
See Matthew Weston's excellent super
hi-res shots of AST #25
- click on each thumb for full shot -
Audrey w/ olde optional AST Pro Panel with "switch
w/playing" Ext Out.
All AST now come with NEW Enlarged Port!
Add Pre-installed PRO
w/EXTERNAL OUT & Night Light Input $80.
Click for full view
Jeff Tweedy of Wilco with
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