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by Synthbuilder
Tue Apr 20, 2021 2:56 am
Forum: Oakley Sound Systems
Topic: merging two cases into one issue
Replies: 5
Views: 82

Re: merging two cases into one issue

Still a puzzle the voltage drop with all modules connected... would still like advice on this. As Schumpfhut says if you take more current than the power supply is built for the output voltage will drop. What you've got with the older PSU is a current limit circuit. The limit cannot be exceeded and...
by Synthbuilder
Tue Apr 20, 2021 2:43 am
Forum: Oakley Sound Systems
Topic: Installing both MOTM and MU power connectors for the ASV
Replies: 4
Views: 67

Re: Installing both MOTM and MU power connectors for the ASV

waldenpotato wrote:
Mon Apr 19, 2021 6:37 pm
if I purchase non-Oakley MU modules to use with the MU Dizzy board, do I have to do any extra link connections in that scenario?
No. You also only need to use the standard MU four way power cable.
by Synthbuilder
Tue Apr 20, 2021 2:40 am
Forum: Oakley Sound Systems
Topic: Time to say goodbye to the 5U modules?
Replies: 15
Views: 639

Re: Time to say goodbye to the 5U modules?

Take the vrg off of the kill list..imho it's too good to die. I agree. But if a board isn't selling well enough, ie. less than five a year, then it'll have to go. That said, there was a bit of a rush last weekend for 5U boards so who knows there maybe life in the old dog yet. A VRG for Eurorack is ...
by Synthbuilder
Tue Apr 20, 2021 2:35 am
Forum: Oakley Sound Systems
Topic: log: building Oakley modules in dotcom format
Replies: 22
Views: 920

Re: log: building Oakley modules in dotcom format

When I connect power between boards, is it a bad idea to merely solder 4 bare wires directly to the boards, without connectors? Is it best to use insulated wire? Personally, I'd make sure that at least one end of the connecting wires is a connector. That way you can separate the boards without sold...
by Synthbuilder
Mon Apr 19, 2021 2:02 am
Forum: Oakley Sound Systems
Topic: Installing both MOTM and MU power connectors for the ASV
Replies: 4
Views: 67

Re: Installing both MOTM and MU power connectors for the ASV

Can both the MOTM and MU power connectors be installed for the ASV? Yes, but... When using the MU connectors with a standard Dotcom power supply you also need to link pins 2 and 3 on the MOTM PSU2 header. Although, if you are using my MU Dizzy you don't need to do this. The MOTM power headers perfo...
by Synthbuilder
Sat Apr 17, 2021 2:53 am
Forum: Oakley Sound Systems
Topic: Oakley Router modified for connection to Oakley Bus
Replies: 2
Views: 80

Re: Oakley Router modified for connection to Oakley Bus

Instead of requiring a Router module maybe the bus could be connected to banana sockets in the back like the power supply's grounding. But I am still curious about whether or not the pin 2 of the bus needs to be passed from case to case as well. Ignore pin 2. It's only there to act as a fire break ...
by Synthbuilder
Wed Apr 14, 2021 12:08 pm
Forum: Oakley Sound Systems
Topic: Time to say goodbye to the 5U modules?
Replies: 15
Views: 639

Re: Time to say goodbye to the 5U modules?

Would this be new modules or are you talking about some kind of conversion of existing modules? Since MU is now the most dominant force in 5U it makes sense to look into doing a range of MU specific modules. These would be shallower than the existing MOTM format ones to ensure they fit into the les...
by Synthbuilder
Sun Apr 11, 2021 3:30 am
Forum: Oakley Sound Systems
Topic: Moisture sensitive devices.
Replies: 1
Views: 78

Re: Moisture sensitive devices.

Does anyone think I'll have problems... No. This is more about control of moisture content for large scale manufacturing. With hand soldering your ICs this sort of thing is not an issue. I recently had some through hole trimmers that came with the same type of packaging and gel bag. Now that was ov...
by Synthbuilder
Tue Apr 06, 2021 3:02 am
Forum: Oakley Sound Systems
Topic: Time to say goodbye to the 5U modules?
Replies: 15
Views: 639

Time to say goodbye to the 5U modules?

It's that time of year again when I do my stock taking and look back on the previous 12 months and see what has been selling and what hasn't. The pandemic and Brexit have both had an impact on sales in general but the 5U modules continue to be less popular than they once were. I had been looking int...
by Synthbuilder
Wed Mar 31, 2021 7:16 am
Forum: General Gear
Topic: Microbrute audio out not working
Replies: 21
Views: 5337

Re: Re:

I'm going to need to replace the tl062 and Im thinking of adding resistor. You know where should I put it. I'm ok with solder but I don't know the place to add the protecting resistor :/ It's been a long time since I've seen the insides of a Microbrute so I can't give you any specific information. ...
by Synthbuilder
Wed Mar 31, 2021 4:49 am
Forum: Music Tech DIY
Topic: Build: Oakley DCR320 chorus rack effect
Replies: 1
Views: 144

Build: Oakley DCR320 chorus rack effect

http://www.oakleysound.com/DCR320_front.jpg I have been asked many times to do a clone of the SDD-320 (Dimension D) but with Klark Teknik's, ie. Behringer's, cost effective attempt last year I was a little wary. You'd not be able to build it for less. However, I thought I'd add something to the pot...
by Synthbuilder
Wed Mar 31, 2021 2:37 am
Forum: General Gear
Topic: Microbrute audio out not working
Replies: 21
Views: 5337

Re: Re:

Have you thought of placing a resistor somewhere to protect the op amp? If I had one I would indeed add a 1K resistor. Maybe even a couple of diodes to the rails or a TVS - although a single resistor is better than nothing. However, even adding a resistor would require a PCB track cut and some very...
by Synthbuilder
Thu Mar 25, 2021 2:48 am
Forum: Oakley Sound Systems
Topic: Oakley PSU2 Banana Socket Part
Replies: 12
Views: 260

Re: Oakley PSU2 Banana Socket Part

Are you just saying that a spade terminal connection between cases would provide lower resistance than using banana connections? Probably, but I've not measured it. And there's banana plugs and banana plugs. Some have just a single springy bit of metal that holds them in place, others have a multit...
by Synthbuilder
Wed Mar 24, 2021 3:48 am
Forum: Oakley Sound Systems
Topic: Oakley PSU2 Banana Socket Part
Replies: 12
Views: 260

Re: Oakley PSU2 Banana Socket Part

It's looking like the hole for any loose wires would be on the outside of the panel, which I would probably just disregard and assume I can use a banana-plugged cable on the top. Sorry, I wasn't clear. The spade terminal is for the external jumper cable that joins two cases together. You get a lowe...
by Synthbuilder
Tue Mar 23, 2021 12:26 pm
Forum: Oakley Sound Systems
Topic: Oakley PSU2 Banana Socket Part
Replies: 12
Views: 260

Re: Oakley PSU2 Banana Socket Part

Is a binding post recommended or would the banana plugs I mentioned above to a good job? Either will do. I prefer the ones with the thread as I don't have to solder. Crimping gives a lower resistance bond compared to soldering. You can shove wires into binding posts but a crimped spade terminal is ...
by Synthbuilder
Tue Mar 23, 2021 4:10 am
Forum: Oakley Sound Systems
Topic: Oakley PSU2 Banana Socket Part
Replies: 12
Views: 260

Re: Oakley PSU2 Banana Socket Part

What you are looking for is a '4mm binding post'. I've no idea where I bought those ones as they were parts I stashed away some time ago. They're most often used as loudspeaker terminals on the back of hi-fi amplifiers. For example: Mouser No: 565-2439-0 However, you don't need insulated ones like t...
by Synthbuilder
Sun Mar 21, 2021 12:10 pm
Forum: Oakley Sound Systems
Topic: Can I mix 5U modules with eurorack modules?
Replies: 15
Views: 448

Re: Can I mix 5U modules with eurorack modules?

Not the pot behavior links, the input normalled to ground link on the socket board. Now I admit I was working in a frenzy yesterday. OK, I understand now. Fitting that link wouldn't have fixed any problems with the grounding of the modular, so I guess it must have been the new power distribution in...
by Synthbuilder
Sun Mar 21, 2021 4:05 am
Forum: Oakley Sound Systems
Topic: Can I mix 5U modules with eurorack modules?
Replies: 15
Views: 448

Re: Can I mix 5U modules with eurorack modules?

Purveyor2 wrote:
Sat Mar 20, 2021 9:16 pm
Oddly it seems that fixing the multimix fixed the inter-case grounding issue.
So it was doing the same weird thing with the new power supply, and only got fixed when the pot behaviour link on the Multimix was fitted? That is indeed very odd as those links have no effect on grounding at all.
by Synthbuilder
Thu Mar 11, 2021 4:11 am
Forum: Oakley Sound Systems
Topic: Vintage Flanger Effects Pedal - SAD alternatives
Replies: 9
Views: 303

Re: Vintage Flanger Effects Pedal - SAD alternatives

My experience does not bear this out, with unused 512's and 1024's going bad while those in actively used gear still work fine since the 70s. You may be right. I think the SAD chips were very sensitive to static damage. And perhaps it's all too easy to zap them when they are stored somewhere. In my...
by Synthbuilder
Wed Mar 10, 2021 11:54 am
Forum: Oakley Sound Systems
Topic: Vintage Flanger Effects Pedal - SAD alternatives
Replies: 9
Views: 303

Re: Vintage Flanger Effects Pedal - SAD alternatives

I mostly keep these ICs because I do have lots of old string machines with these in them, like the VP-330 Mk I and RS-09 Mk I. Both of those use the SAD521D. It's a 8 pin DIL chip. The older SAD512 is actually just a SAD1024 with only half the silicon die wired to the outside world. I think this is...
by Synthbuilder
Wed Mar 10, 2021 4:52 am
Forum: Oakley Sound Systems
Topic: Vintage Flanger Effects Pedal - SAD alternatives
Replies: 9
Views: 303

Re: Vintage Flanger Effects Pedal - SAD alternatives

Two 512's can be chained on a daughterboard. If you have two SAD512D then it may be worthwhile selling them*. They are getting really rare. :75: And buying a single SAD1024A. Which are also expensive but less rare. Or even buying a flanger pedal with a SAD1024. * Unless you have an older VP-330, RS...
by Synthbuilder
Wed Mar 10, 2021 4:13 am
Forum: Oakley Sound Systems
Topic: Vintage Flanger Effects Pedal - SAD alternatives
Replies: 9
Views: 303

Re: Vintage Flanger Effects Pedal - SAD alternatives

Would the pedal project be of interest at all using SAD512, or would it become such a weak sound effect that it is of no use? It still sounds lovely with a SAD512D. But note the D suffix at the end. The SAD512 is a different chip and I haven't tested it with these. The SAD1024 is effectively two SA...
by Synthbuilder
Fri Mar 05, 2021 3:58 am
Forum: Oakley Sound Systems
Topic: Incoming Project: DCR320
Replies: 42
Views: 1114

Re: Incoming Project: DCR320

Everything is measuring as it should. :tu: if i am looking at my delay times correctly, tuning the tune control to 43khz actually gets me that max delay of 12ms for setting 1. Remember that the modulation will also affect delay time. Setting the VCOs to around 50kHz is done so that once the LFO is ...
by Synthbuilder
Thu Mar 04, 2021 2:30 pm
Forum: Oakley Sound Systems
Topic: Incoming Project: DCR320
Replies: 42
Views: 1114

Re: Incoming Project: DCR320

Pin 1 of U8 is about 50k and is spikey. Ive included a pic Pin 2 is more rounded saw tooth and double the frequency of pin 1. Pic also included I measure nothing on pin 7 Are you sure that was U8? The V3102? Pin 2 and pin 4 should both be square waves at half the frequency of the pulse wave found a...
by Synthbuilder
Thu Mar 04, 2021 6:09 am
Forum: Oakley Sound Systems
Topic: Incoming Project: DCR320
Replies: 42
Views: 1114

Re: Incoming Project: DCR320

when going through the instructions for “tune” i cant get it lower than 86k hz Just had a thought. How are you measuring frequency? It just happens that 86kHz is twice what I would expect the frequency to be with the TUNE trimmer turned to its lowest setting. If you're using the scope's built in fr...

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