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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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heres a question for the lot of you-due to general lack of many available capacitors in my shop-- i recently mixed both film AND oil caps to pull together a necessary value for a passive crossover. the GOOD of it, is that it takes away some of ...
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Steverino, don't forget that Romy's Placette line stage has VERY low output impedance. It might be able to handle even the shunt capacitance of 75 feet of cable with minimal HF losses. If the cable is 100 pF/foot then its reactive impedance is abou...
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I haven't tried your experiment myself, but for your description, I agree that one second is too much time to get the suspension back to its rest state. Maybe the coils develop some capacitive charge that needs some time to bleed.Rgrds....
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[quote user="martinshorn"]hi Anthony Im not saying to use ribbons (really not) but why you’re afraid of high capacitance that kind of shortens the resistance in high frequencies while you’re not playing the woofers in those (>10k) ?It’s purely AC ...
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well, to add my bit of mustard to this here oldie thread.I HAVE mixed film and oils successfully in e.g. a tweeter x-over of a Burmester 961. The tweeter is an AMT (air-motion-transformer) and very revealing.The original C's are two sets of...
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Another consideration where I am planning to make the single-stage Milq different will be the power supply for the thing. The amp will have my typical SS fast-soft rectification with mandatory “gentle enter” LCRC filter, however I consider it t...
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I would say that nothing has changed since last night. The sound still a bit harder then I would like it to have. This hardness is very interesting and in way different, it is not type of the hardness that I would discard as “bad” attribute of sound ...
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I certainly have my hands full with those dams PP2000. As I least last night UPS lost one of my units I send to PurePower to repair. The shipment was insured but the saddest part is that it was the best sounding PP2000 of mine. So, I will not be get...
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It looks like my extra capacitance tweak works very well. I have it for 3 weeks and even I do not have the “super electricity days” anymore but I think the general electricity result is more stable. Nowadays my playback runs 2-3 hours each day on wee...
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Romy, Some very good points here... if I downloaded the correct schematic from your site for the 6-channel Melq amp (also has the term DSET in the title) then you have created a 6-channel SET amp with built-in crossover points. Your first ...
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I actually woke up today at 6AM, check all settings on my arms (after a few month of not working), demagnetized the needles and was spinning records all mooring. One of the benefits that I got with new phonostage is that the grounding patters for all...
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[quote user="drdna"]What specific objectives did the air caps address in the circuit? You refer to the tempted virtue sound but I am unsure as to the goals that you were trying to achieve with this circuit alteration?[/quote]Adrian,
I what wro...
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I've been thinking about how I am going to wire these Bass Cannons as well as the horns on the horn stack. For some time now I have preferred ribbon/foil speaker cables for the relatively low sensitivity speakers I have been using. The reason I bel...
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[quote user="martinshorn"]hi Anthony Im not saying to use ribbons (really not) but why you’re afraid of high capacitance that kind of shortens the resistance in high frequencies while you’re not playing the woofers in those (>10k) ?It’s purely AC ...
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[quote user="hagtech"] The issue I see is that of intermodulation distortion on the biasing of the output tube. It will effectively change HF operating point per supply ripple. Easy to understand if one imagines a gross ripple of 50V.&nbs...
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Well, the subject of capacitors in that PS should be resolved. We discussed it a lot with Dima and he feel that I am fool all my idea to try in this supply “minimum capacitance”. He actually does not believe in small capacitance, he has a vision how ...
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I have to admit that although the Macondo “Water Drop Tweeter” sounds very good but I do not have that “shocking sound” that I got from the “Water Drop” during my initial introduction to it. I kind of always felt it and I thought that I get use t...
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The Sussurro has an unusually wide loading range listed by Soundsmith, ranging from 470 ohms to 5k ohms. It is possible that more recent models have a somewhat tighter range between 470 and 2k ohms but I am not positive. The capacitance of Soundsmith...
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Thanks all for the replies! Looks like a very risky business.Given the work involved and highly unsure effect, I'll happily skip the shielding. Your comments suggest that the high capacitance line to ground (which the shield would happily provide) is...
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Yep, it looks, like very close to “it” design-wise. http://www.studiomaudio.info/loftinwhite.htmlIn the way this amp is one of the manifestations of Loftin-White DC-coupled but it has some own things. The driver stage is the Melquiades Tube to k...
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Perhaps one reason why the Sussurro does not sound like other MC cartridges of Armen's experience is that it is NOT a MC. In fact it is a Moving Iron cartridge with fixed coils and fixed magnet albeit with low output.NB Capacitance is an issue I beli...
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Ah, those figures seem more reasonable - 30pF seemed a bit low. Well, I'm not sure what you should be on the lookout for - as you say, it's a completely different animal to having a 3uF in line with the S2. What I would suggest, and this isn't ...
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Ok, I made some further experiments driving this time my S2 driver from Milq DH DSET. The hell of the sensitively - it was too much. So, I went for 4:1 inner-stage ratio. The result was very successful and the amp looks like was able to get more...
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Well, probably not up in smoke, but it is just not functional any more. I was away for a few days and came back to my room to find the Placette refusing to change volume or select a source input, so something is amiss. Perhaps something has been am...
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First of all, thanks for additional detail. As mentioned I can speak only for my Fidelity Research XF-1 (30dB). Loading it on secondary as you mentioned, it ALSO damps the trannie - result in my case: less resolution. Primary loading is MUCH more sen...
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Thanks N-set, yes I see your point. I remember now that Brian said how photons carry the information to tell the electrons where they are with respect to each other, so it is at the speed of light, and not instantaneous, of course. Whoops, looks like...
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Yes, it is a bit confusing, as I meant to say that it will be a half of capacitance, I said it twice and it looks unclear. Still anybody understands how series capacitance works. BTW, it was a standard practice in before 70, before industry made by-p...
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AlloT wrote: "Absolutely. Making a transformer for < 100Hz would mean to use a huge core and a fairly large airgap to get more inductance at a given standing current. This makes winding the transformer with low parasitic capacitance and low leakag...
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[quote user="hagtech"] It's difficult for me to guess exactly what the possible sonic effects of the ripples would be. I see a tube operating at a fixed point, having a particular distortion spectrum. Say -42dB 2nd harmonic. Then, t...
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Folks, This thread caught my attention, because here Romy waxes lyrically about the failings of the Denon Cartridges. Now I only consider ONE Denon worth bothering, the ORIGINAL 103, it is often inaccuratly called 103C. It has a medium compliance (ar...
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