Java passive pres

julesd68
Global Moderator

Posts: 19,190

Java passive pres Jul 15, 2016 10:09:49 GMT

Quote

Post by julesd68 on Jul 15, 2016 10:09:49 GMT

Some interesting ldr based passive pre amps here -

www.javahifi.com/

They haven't quite reached their target on Kickstarter yet with 35 hours to go ...

Aesthetically pleasing for me, plenty of options - I do like the wood surround ...

Spotify Premium > Sonore ultraRendu > Gustard U18 >Topping D70S > Cambridge Audio Edge W > Sonus Faber Venere 2.5

MartinT Administrator Posts: 54,826	Java passive pres Jul 15, 2016 10:33:50 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by MartinT on Jul 15, 2016 10:33:50 GMT Careful, it may not be legal to sell or buy a device containing an LDR in the UK.
	TP-Link MR-600 router > Uptone EtherREGEN reclocker > Sonore Signature Rendu Deluxe streamer > Coherent modded Gustard U18 DDC > Gustard X26 Pro DAC > Belles SA-100 power amp > Usher Dancer Be-20 speakers. 2 x AfterDark master clocks. PS Audio P3 & P12 regenerators. 2 x Uptone JS-2 & Coherent QP-2 LPSUs.

Deleted Deleted Member Posts: 0	Java passive pres Jul 17, 2016 19:58:44 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Deleted on Jul 17, 2016 19:58:44 GMT Hi Martin, it is OK if it is Selenium but not Cadmium. Also Sharp do a optical FET,s which also work well driven from a external light source at 850nm. And you could also try the Germanium types old one like OCP71/2.
	Last Edit: Jul 17, 2016 19:59:20 GMT by Deleted

julesd68
Global Moderator

Posts: 19,190

Java passive pres Jul 17, 2016 21:43:04 GMT via mobile

Quote

Post by julesd68 on Jul 17, 2016 21:43:04 GMT

Well they managed to reach their Kickstarter target and start shipping in September / October...

I'm interested to know how much cadmium sulphide would be used in such an application... Under the Restriction of Hazardous Substances Directive, use of Cadmium is limited to a concentration 0.01% or 100 ppm when used in electronic equipment...

I notice that Philips are trying to introduce cadmium based TV and computer displays -

www.nanocotechnologies.com/media/press-releases/legal-uncertainty-surrounds-use-cadmium-television-and-computer-displays-eu

Spotify Premium > Sonore ultraRendu > Gustard U18 >Topping D70S > Cambridge Audio Edge W > Sonus Faber Venere 2.5

MartinT Administrator Posts: 54,826	Java passive pres Jul 18, 2016 5:23:46 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by MartinT on Jul 18, 2016 5:23:46 GMT Jul 17, 2016 19:58:44 GMT @colin said: And you could also try the Germanium types old one like OCP71/2. I remember them well!
	TP-Link MR-600 router > Uptone EtherREGEN reclocker > Sonore Signature Rendu Deluxe streamer > Coherent modded Gustard U18 DDC > Gustard X26 Pro DAC > Belles SA-100 power amp > Usher Dancer Be-20 speakers. 2 x AfterDark master clocks. PS Audio P3 & P12 regenerators. 2 x Uptone JS-2 & Coherent QP-2 LPSUs.

The Audio Standard

The Friendly Hi-Fi and Music Forum

The Audio Standard
Connecting People through Hi-Fi and Music

Post by julesd68 on Jul 15, 2016 10:09:49 GMT

Post by MartinT on Jul 15, 2016 10:33:50 GMT

Post by Deleted on Jul 17, 2016 19:58:44 GMT

Post by julesd68 on Jul 17, 2016 21:43:04 GMT

Post by MartinT on Jul 18, 2016 5:23:46 GMT