janhemme.tumblr.com @janhemme - Tumblr Blog

SKALAR light & sound installation @ Kraftwerk Berlin (part of CTM Festival 2018).

#skalar #berlin #kraftwerk #tresor #art #installation #ctm festival #kraftwerk berlin #christopher bauder #kangding ray #ctm berlin #whitevoid

Herbstliches Wandern im Elbsandsteingebirge…

#elbsandsteingebirge #sächsische schweiz #hiking #wandern #elbsandstein #bastei #felsen #felsmassiv #komoot

Seilbahnfahren auf der IGA 2017 in Berlin-Marzahn…

#igaberlin2017 #iga2017 #igaberlin #berlin #marzahn #kienberg #seilbahn #cablecar #ropeway

Hiking on the Schneekoppe/Sněžka ridgeway in the Czech Giant Mountains…

#schneekoppe #sněžka #riesengebirge #giant mountains #hiking #wandern #bergwandern #polen #tschechien #böhmen #niederschlesien #sudeten

Going for a hike in the Harz uplands…

#harz #harzwandern #hiking #magdeburger weg #uplands #torfhaus #bad harzburg #tagestour #day trip #mittelgebirge #komoot #oberharz #märchenwald #hexen #märchen #brüder grimm

“Und rings 1 Herrlichkeit vong Welt…”

-- Johann Wolfgang vong Goethe (Tagebücher, 1. Juni 1775)

Impressionen unserer diesjährigen E5-Alpenüberquerung von Oberstdorf nach Meran.

#hiking #alpinehiking #wandern #bergwandern #mountains #alpen #alps #e5 #alpenüberquerung #berge #dav #nature #natur #leben am limit

Heute mit meinem Vater (am Schweißgerät oben links) aus einer alten Waschmaschinentrommel und zurechtgesägten Winkeleisen eine praktische Feuerschale gebaut…

#feuerschale #waschmaschinentrommel #lagerfeuer #diy #waschmaschine #schweissen #welding #projekt

At Vintage Computing Festival Berlin 2016...

#made with tumblr #gif #vcfb #vcfberlin #berlin #vintagecomputing #vintage computing #led

”Satan laughs and spreads his wings…“

#black sabbath #the end #farewell tour #berlin #waldbühne

My son wanted a stompbox for his shortscale Telecaster, so I built him a modified Trotsky Drive with a Russian KT312 transistor, Russian military surplus Д312А germanium diodes and vintage NOS polystyrene caps. Very simple setup w. only a volume knob (33k resistor for fixed gain). Sounds fantastic.

#trotsky drive #diy #stompbox #guitar pedal #overdrive #veroboard #stripboard #kt312 #d312a #fuzz

Just hacked and relic'ed an old vintage childrens guitar that was given to me for free.

Added Gibson-style tuners (kept the old bridge and tailpiece), Pyramid low tension strings, a single coil pickup, VT-controls and a switchable true-bypass overdrive.

Tuning is open-G for hill country blues w. bottleneck slide. Awesome lofi tone when played through a ruby amp.

#kids guitar #guitar #electric guitar #hill country blues #slide guitar #hack #diy #vintage #upcycling #upcycled #cigar box #cigar box guitar #cigar box amp

LM386-based guitar amps like the Ruby or the Noisy Cricket are excellent home use amps but sometimes leave you wanting something a little more flexible: 1st, they can be earpiercingly loud if the circuit gets pushed into the tube-like saturation it is famous for; 2nd, they lack an option for a decent tone stack (the one on the Cricket is just a high blend).

But, Lo! and Behold! There is an awesome variant by Jody aka MylkStuff, who came up with a stripboard design for his mylk[386] amp that is compact and nice sounding (with a power attenuator to control the output volume, yeh!) and also well documented with attention to detail. This means that you can very easily modify and adapt it to your needs (Jody also sells beautiful and handbuilt etched-aluminium special editions).

I had already converted an old Fender Frontman B-15 into an 8″ speaker cabinet for my Bass Cricket, so when I got a crappy Squier SP-10 guitar combo for free, I thought: well, let’s turn that one into a matching head and make use of Jody’s fine design.

I used a 100k pot/10uf cap combination with 1N4148/1N4448 clipping diodes for the input stage (for a range from clean to nice crunch, no hi-gain here!), added a 2-knob Baxandall tone stack w. mid-boost (à la Ampeg Portaflex) and put a gain trimpot on the power amp IC. Two boost variants (100nf and 47nf) can be toggled via a three way switch on the front and a second switch on the back selects input caps for guitar (47nf) and bass (1uf). The amp can be operated on battery (9V block, 6-8 AAs or 6 D-cells) or by power adapter. An external speaker out deactivates the internal speaker when used and there is also a headphones jack (I also made a nice fabric covered speaker chord from an old lamp cable).

What remains to do is to replace the crappy 8″ speaker currently used with a Jensen CH8/20 or P8R Alnico and maybe do some experimenting with different clipping diodes… (I might also change the 470r log output pot for a linear one, as the power attenuator works too abrupt for my taste.)