Electro-Music Klee Sequencer Build and Applications Thread

Luka · Joined: Jun 29, 2007 Posts: 1003 Location: Melb.

on the topic of grounding and front panels
my panels are made of light grade steal
will these suffer more from grounding issues than alluminum?

Uncle Krunkus · Posted: Thu Nov 29, 2007 5:36 am Post subject:

No, they'll be fine.

I actually didn't connect any socket grounds at the panel, only functional grounds such as the bottom of the sliders etc. I've added a simple +/-15V PSU, and connected the mains ground to the case, and 0V. So the sockets all get their reference off the case. Works fine.

Scott Stites · Posted: Sat Dec 01, 2007 8:13 am Post subject:

Scott Stites · Posted: Sat Dec 01, 2007 8:36 am Post subject:

Pehr · Posted: Sat Dec 01, 2007 10:34 am Post subject:

I know, deleted the post when I found out. I thought all gate signals went to the digital board but they do actually jump to the analog via some diodes first Cool

Btw, I actually found a misprint:

Page 59, Figure 6-10, above leftmost LED:

Scott Stites · Posted: Mon Dec 03, 2007 11:12 am Post subject:

Righto!

fonik · Posted: Thu Dec 06, 2007 1:26 pm Post subject:

Scott Stites · Posted: Thu Dec 06, 2007 1:46 pm Post subject:

You could tack a 100K resistor from the tip lug of the input jack to the ground lug, that would do it!

fonik · Posted: Thu Dec 06, 2007 2:03 pm Post subject:

fonik · Posted: Thu Dec 06, 2007 2:19 pm Post subject:

so sorry, scott. i did not use the current interconnect file so i was missing page 9, showing the variable voltage options! now i see R33 is influent for the option i chose, because it is not connected to anything Very Happy

a.b.o.z. · Posted: Sat Dec 08, 2007 5:44 pm Post subject:

I just started solderin analogue board..
and first thing I'm not shure is... what values are 100R resistors? R49-R57

guitarfool · Posted: Sat Dec 08, 2007 9:03 pm Post subject:

a.b.o.z. · Posted: Sun Dec 09, 2007 1:18 pm Post subject:

oh so simple. thnx Smile

Pehr

Possible misprint: Shouldn't all the voltages on pin 1 of U8 be negative? It says positive in table 10-1, but I read negative on mu DVM Confused

See page 112.

Scott Stites · Posted: Fri Dec 14, 2007 10:00 am Post subject:

Yes, they should be negative. I thought I'd fixed that! Embarassed

a.b.o.z. · Posted: Thu Dec 20, 2007 9:18 am Post subject: Gate Bus Resistors

one question..
for now I will mostly use klee with two MFOS soundlabs.
what voltages do i need?
5 or 10?

Scott Stites · Posted: Thu Dec 20, 2007 9:33 am Post subject:

I'd go for the 10V range myself. Actual voltage will be 9V.

A quick look at the design shows Ray's got 9.1V zeners on the gate input, so there's nothing to worry about in that regard.

Cheers,
Scott

Pehr · Posted: Thu Dec 20, 2007 9:51 am Post subject:

The Sound Lab EG triggers from about 2V.

Tronato · Posted: Wed Jan 09, 2008 2:53 pm Post subject: Power Supply

Hello Genltlemen!

Hope you've all had a great holiday!

I regained conciousness yesterday morning!

How are you all powering the klee?

Thanks!

TRON

Uncle Krunkus · Posted: Wed Jan 09, 2008 10:57 pm Post subject:

I built my own little +/-15V supply and installed it in the case. Just a 7VA 15-0-15 transformer, fuse, rectifier, 2200uFs, 7815/7915, 100nFs and out to the boards. Works fine.

Pehr · Posted: Thu Jan 10, 2008 2:58 am Post subject:

I use this PSU (337/317) set to +/- 12V with a 15VAC transformer.

Alienation · Joined: Jul 23, 2007 Posts: 47 Location: Midsouth

Ken Stone's CGS66 power supply pcb is going into mine, you can get the parts for it from Jameco with little hassle perusing their catalog.

I have to say Ken Stone's stuff has helped tremendously with getting the Klee off the desk and into action. Smile

I also used his LED buffer circuit pcb.

Tronato · Posted: Thu Jan 10, 2008 11:12 am Post subject:

Hello Alienation!
Ken Stones' CGS 66 is precisely the one I'm building but I have great doubts regarding the orientation of the voltage regulators.
Looking at it with tha 4 diodes in square formation to your left should the part of the regulators that have the letters/numbers printed both be visible?
Do you have a picture of it?

Thanks!

TRON

Tronato · Posted: Fri Jan 11, 2008 5:48 pm Post subject:

Hello!

This is an e-mail I sent to Ken Scott which left me with more doubts than answers regarding the CGS 66 regulated power supply...
By the way I would still like to know the orientation of the Voltage Regulator IC's...

The transformer is a Stancor P-8693 and it's specifications apppear
on
the following page:
>
>
http://www.newark.com/jsp/content/printCatalog.jsp?display=single&cat=cat125
&page=1413
>
> Will this work?

This one will only work if the outer wires are wired between 0V and
18VAC
pads on the circuit board, and the center tap is NOT USED.

?????

Alienation · Joined: Jul 23, 2007 Posts: 47 Location: Midsouth

I'm using a Jameco transformer part # 149957 on page 171 in the catalog-$9.59 USD.

Ken Stone is pretty clear in his description of wiring for the transformer. 18V split off the secondary center tap to ground.

Also check the silkscreened orientation on the CGS66 PCB for the Voltage regulators they are marked as to mounting position. Ken recommends heat sinks and gives specifics on the type to use, these too can be found @ Jameco.

Hope this helps.