Search found 126 matches

by sandwich
Thu Apr 04, 2019 9:18 am
Forum: HELP!
Topic: EMU ESI-32 crackling sound and distorted playback
Replies: 12
Views: 1439

Re: EMU ESI-32 crackling sound and distorted playback

Hi, how many RAM modules are there? Could still be a dodgy one. I bought mine off eBay and the seller had added extra RAM and it was one of the extra modules he’d added that turned out to be faulty. Fortunately for me it happened to be the first one I pulled out so didn’t take long! I confirmed it b...
by sandwich
Tue Apr 02, 2019 12:09 pm
Forum: HELP!
Topic: EMU ESI-32 crackling sound and distorted playback
Replies: 12
Views: 1439

Re: EMU ESI-32 crackling sound and distorted playback

I had this same problem with an ESI 4000, in my case it turned out to be a dodgy ram module.

Regards
Dave
by sandwich
Sat Dec 29, 2018 7:37 pm
Forum: HELP!
Topic: Emax Clear Coating
Replies: 0
Views: 674

Emax Clear Coating

Hello!
Does anyone know what that clear coating is that Emu put over the text on the Emax 1 front panel? Mines bubbling and peeling off! Thanks
by sandwich
Thu Dec 06, 2018 11:03 am
Forum: HELP!
Topic: Jupiter 8 Problem
Replies: 2
Views: 1014

Re: Jupiter 8 Problem

tim gueguen wrote:Dirty pots maybe?
Aah could be, that could explain the changing parameters. At least that's fixable too! ;)
by sandwich
Tue Dec 04, 2018 3:35 pm
Forum: HELP!
Topic: Jupiter 8 Problem
Replies: 2
Views: 1014

Jupiter 8 Problem

Hello there! My beloved Jupiter 8 began behaving a little odd the other night. When selecting a patch from memory and then playing it, the sound changes slightly and the dots appear on the display as they do to indicate when a parameter has been altered. It does this without touching anything. I hav...
by sandwich
Fri Oct 19, 2018 4:19 pm
Forum: General Synthesizers
Topic: The Other Capacitors
Replies: 12
Views: 3515

Re: The Other Capacitors

Yes, Farnell is CPC. Voltage regulators get replaced mainly because some classic synth designs didn't spec them right, or they didn't design a sufficient heat sink. That said they do just fail due to age, again because of the heat. Look, don't automatically replace any component. Inspect, measure a...
by sandwich
Fri Oct 19, 2018 3:31 pm
Forum: General Synthesizers
Topic: The Other Capacitors
Replies: 12
Views: 3515

Re: The Other Capacitors

Modern tantalums seem more reliable. But they still have very tight tolerances in regards to overvoltage. You can find them in parallel to the backup batteries of some vintage digital synths. The voltage is around 3V and the caps are usually rated for 16V, so not a great danger. Still I don´t trust...
by sandwich
Fri Oct 19, 2018 3:29 pm
Forum: General Synthesizers
Topic: The Other Capacitors
Replies: 12
Views: 3515

Re: The Other Capacitors

The standard thing, apparently, is to "derate" by using a tant that's rated 50% higher than what the circuit requires. You can go higher if you like, does no harm, just costs you a few cents extra. General opinion seems to be that the Japanese manufactures make the best electrolytics, would that be...
by sandwich
Thu Oct 18, 2018 11:50 am
Forum: General Synthesizers
Topic: The Other Capacitors
Replies: 12
Views: 3515

Re: The Other Capacitors

I've had tantalum caps failing on me more often than electrolytic ones -- ARP Omnis are full of those dreadful things which render the Omni unplayable until they have all been replaced. Electrolytic caps tend to "puke" as they say, i. e. some substance leaking out. This, or when they bulge -- then ...
by sandwich
Thu Oct 18, 2018 11:20 am
Forum: General Synthesizers
Topic: The Other Capacitors
Replies: 12
Views: 3515

The Other Capacitors

Hi all,

I was just wondering, I'm well aware of ageing electrolytic capacitors and how they eventually need replacing but what about the other types? Do tantalum and ceramic types need to be replaced too? Also are there any other components that should be replaced due to ageing?

Kind Regards
by sandwich
Fri Apr 13, 2018 8:08 am
Forum: HELP!
Topic: Removing Hard Flux Residue
Replies: 0
Views: 929

Removing Hard Flux Residue

Hello, I wonder if any of our electronics experts on here can help with this? I was desoldering some parts off a PCB and a hard brown residue has been left behind on the board around the holes. I'm assuming this is flux that was used in the original soldering? I've tried some flux cleaner from Mapli...
by sandwich
Wed Mar 21, 2018 12:07 am
Forum: Samplers
Topic: Emax Slider Pots
Replies: 7
Views: 3252

Re: Emax Slider Pots

You should be able to find a replacement but you might also be able to clean it up and get it working like new again, this often requires de-soldering and disassembling the pot though because what often happens is debris gets stuck under the tines which can absorb moisture and eventually rust the t...
by sandwich
Wed Mar 21, 2018 12:03 am
Forum: Samplers
Topic: Emax Slider Pots
Replies: 7
Views: 3252

Re: Emax Slider Pots

Are these something that can be bought new would you know? Just wondering as the Emax isn't as ancient as some vintage analogues, so maybe new ones would go in? Yes. I'm more familiar with U.S. vendors, but they can definitely be purchased new. They aren't obsolete or specialty parts at all -- they...
by sandwich
Tue Mar 20, 2018 5:17 pm
Forum: Samplers
Topic: Emax Slider Pots
Replies: 7
Views: 3252

Re: Emax Slider Pots

10K ohm linear (aka type B) with 45mm travel for both, I believe. Physical size: 60mm x 9mm x 6.5mm Thanks for this info Rasputin :) Are these something that can be bought new would you know? Just wondering as the Emax isn't as ancient as some vintage analogues, so maybe new ones would go in? Cheer...
by sandwich
Tue Mar 20, 2018 3:34 pm
Forum: Samplers
Topic: Emax Slider Pots
Replies: 7
Views: 3252

Emax Slider Pots

Hello,

Does anyone know what the values of the volume and data slider pots are in an Emax 1? Also can new ones be found anywhere in the UK?

Thanks
Dave