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Post by danielquinn on Feb 12, 2015 10:58:57 GMT
For the avoidance of doubt , LDR'S are necessarily composed of cadmium .
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Post by Sovereign on Feb 12, 2015 11:09:55 GMT
For the avoidance of doubt , LDR'S are necessarily composed of cadmium . Well done chaps. |
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Post by Deleted on Feb 12, 2015 11:16:59 GMT
Well I believe that the manufacturer having been made aware of the legal situation in the EU was looking at alternatives to Cadmium. I think therefore Jammy is asking a valid question with regard to these boards. I will be interested to hear if there is any real advantage over passive pre amps given all the hassle over legit use of LDRs in domestic hi-fi.
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Post by tony on Feb 13, 2015 1:40:37 GMT
Im just interested in reading how it performs sonically against a conventional pre. Cant say I had thought about eating or smoking one. I corresponded with the boys down under and they advised that running one on a car battery was easily doable-right up my street.
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Post by chukka on Feb 13, 2015 19:34:19 GMT
Yes !
I am very eager to get Sov's feedback when he completes that beautiful double mono LDR with separate power supplies. Wow ! Great work.
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Post by John on Feb 13, 2015 19:36:49 GMT
I am hoping to hear it next weekend
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Post by Sovereign on Feb 13, 2015 19:54:15 GMT
I've been meaning to start the build for a couple of days but the family has been really I'll and I've been busy running the house.
I've had a few beers but I'll start the build tonight when the mrs goes to bed .
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Post by chukka on Feb 13, 2015 20:20:04 GMT
OK ! ... but don't plug it into the mains until tomorrow   |
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Post by chukka on Feb 13, 2015 23:42:40 GMT
Im just interested in reading how it performs sonically against a conventional pre. Cant say I had thought about eating or smoking one. I corresponded with the boys down under and they advised that running one on a car battery was easily doable-right up my street. It is. and he kits are very easy to build. Chris from Stereo Coffee is a real gent and very helpful. |
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Post by Sovereign on Feb 14, 2015 0:04:29 GMT
They are very easy to build, if I were to build a simple version such as this lencomotion.files.wordpress.com/2014/03/ldr03.jpgHowever I decided to push the envelope and go for a dual mono, and one of this type I don't believe has been atempted before, although I don't know for sure. I plan to finish it by the end of the weekend, If I can get a few hours to myself ;-) |
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Post by chukka on Feb 14, 2015 0:07:52 GMT
yes ! that is why I am so eager to get your impressions ;-)
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Post by Deleted on Feb 14, 2015 12:17:32 GMT
I'm not really interested in reading circular arguments or debates that have already played out elsewhere. Especially if it's people whose opinions I've already read. There's just no point and it switches lots of people off.
From my own perspective I'd like to hear from Sov over time as to whether the issues of the LDRs drifting are now a thing of the past. I'd also like to hear about the sound of the thing, especially in comparison with other items and the opinions of others ifbthey get to hear it.
I'm still not sure am LDR would be for me because I sell stuff so often and there may be issues about me selling it on, but if it's cheap enough, good enough and reliable enough then I may be persuaded. I do (very) occasionally hang onto things and if it's worth keeping then there's no issue for me.
I also love to see people's builds and this one looks very tidy indeed. No offence to anyone but I hate to see things that look really shabby with odd, un-painted cases and hand written labels etc. this one looks like a production unit. Keep the pics coming please.
Edit: at the risk of appearing completely stupid (never stopped me before, so what the hell) would twin volume knobs actually get round any drift problems? Some people don't like two controls but I am not one of them. I can see Sov only has one control on his so I figured it was worth asking.
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Post by MartinT on Feb 14, 2015 12:34:33 GMT
No, the drift is in the circuit not the volume pots. With separate controls you can, of course, adjust it out. Personally, I dislike separate controls.
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Post by Deleted on Feb 14, 2015 12:38:08 GMT
Thanks, Martin. I thought that may be the case but I'm clueless. I actually really like dual controls but I think that's because I get a bit OCD about channel balance and prefer to have control myself. It'seobably irrational because a decent pot will probably make a better and more reliable job of this than I can but it just feels right for me. I realise I'm in the minority though.
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Post by Sovereign on Feb 15, 2015 2:22:30 GMT
Well it's 2:00am and I'm nearly done. But for some reason I don't have power to the left Chanel. Probably just need to swap wires round, but not now, I'm off to bed.
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Post by ChrisB on Feb 15, 2015 19:07:59 GMT
I have started another thread here for discussion about the safety, legality and morality of using products containing cadmium. Please keep such posts there. All off-topic posts have been deleted from this thread and any more will be deleted without notice. |
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Post by Sovereign on Feb 15, 2015 19:20:08 GMT
The build so far, pretty much done, just need to run some tests and bring some order to the birds nest.  |
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Post by chukka on Feb 15, 2015 19:22:43 GMT
hey, cool ! what is the wiring you have used ?
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Post by Sovereign on Feb 15, 2015 19:36:30 GMT
The internal cores of Klotz MC500 for everything signal wise. For power it's Alpha 2.5mm
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Post by pre65 on Feb 15, 2015 22:03:00 GMT
I hope it sounds better than the "loan" LDR pre that I tried. 
As always, just my opinion.
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