This is where you can see some old school electronics.
.... the stuff that rebuilt Japan after WWII.
Akihabara ‘electric town’ is famous for tiny
retailers selling radios and electronic parts at cut-rate prices under the
Sobu line tracks.
It's a shade of what it used to be in the 50's & 60s but some of those "tiny hole in the wall" shops are still here, crammed together. It's worth a visit just for the historical aspect.
DIY old
school with parts in open boxes and plastic containers.
Analog, digital, LEDS, knobs, jacks, resistors, capacitors, etc etc... the way it used to be before
the internet came along and killed off the little shops.
Most of thehe electronic shops that used to crowd both sides of this
street have been displaced by game centres and animation shops. It’s also a
great place to treasure hunt for old games.
Akihabara is centered around Akihabara Station, located on the JR
Yamanote, Keihin-Tohoku, and Chuo Local lines. Take the "Akihabara Electric Town" exit. (ラジオセンター), 1-14-2 Soto-Kanda.
By subway : travel to Akihabara Station by the Hibiya
line (H15), or Suehirocho Station by the Ginza line (G14).
Travel
through the Atherton Tablelands * Take a 2 hour guided rainforest
walk and a swim at a beautiful waterfall in the World Heritage
Woorooneran National Park * Mt Surprise * Sunset *
Overnight air-conditioned multi-share accommodation Club Hotel,
Croydon
DAY 2 - CROYDON TO MT. ISA
* Travel from
Croydon to Normanton * Normanton, where the largest salt water
crocodile in the world was caught * Travel through the "Channel
Country" * Free time in Mt Isa * Enjoy a great meal and
air-conditioned multi- share accommodation in Mt Isa
DAY 3 - MT. ISA TO CAPE
CRAWFORD
* Journey into the Northern Territory today *
Keep an eye our for the ever present wildlife in this remote
region * Travel through the Barkly Tablelands * Overnight
accommodation at the Heart Break Hotel
DAY 4 - CAPE
CRAWFORD TO Darwin
* Historic Daly Waters * Bitter
Springs for a swim at this significant aboriginal site * Adelaide River * Arrive Darwin
for end of tour dinner
These are my build notes for the Nonlinearcircuits eurorack version of the Aries 329 Phase Flange.
"Circuit is based on the Aries 329 phase/Flange, which is not the same as
but shares some similarities with the Arp Quadra phaser and the Tau
pipe Phaser. This version is nearly all smd and uses BCM847 matched
transistors."
The old Aries brochure:
Some pics of the NLC panel & virgin PCBs
Andrew supplied this board with the matched 847s already soldered onto the PCB.
This row is of the 22nf caps. Don't use cheap ones.
Install the rest of the SMDs
It's time for the JFETs
JFETs can be either N or P channel.
The BOM specifies either a J108 or J 112. Both are N-channel.
The module needs two of these matched FETs.
G= gate, S= source, D= drain.
A voltage at the gate controls the channel resistance (between the S & D).
Andrew reckons that you do not need to match them to 1μV. Just buy a
batch of at least 10 or so and find the 2 closest to each other. Maybe
with in a few mV is okay. ??
I purchased a batch of J112s from Mouser and tested them using my Atlas DCA Pro.
Its a wonderful device which will make your job so much easier.
It's important to match the FETs as closely as possible. In my batch of 12 the results varied greatly.
I tested for VGSoff, Idss, VGSon in that order.
If you can get VGSoff very close and Idss in the ballpark, you should be ok.
Main components are in.
Now its time for the jacks, switches & pots.
This is what the final module looks like:
Calibration is very important.
When I first turned the phaser on I was confronted with a loud continuous screech.
Adjustment of the trimpots eliminated this problem.
The main one is the 50K pot near the phase jack.
It also controls the amt of clipping at the outputs. A lot depends on the FETs chosen
Check out Andrew's NLC build notes for further info regarding calibration.