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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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I do not completely agree with everything that Dave imply in this article but all-together it is a very good article. The phase by logging graph is particularly interesting and I did not seen it was published anywhere.
http://www.intact...
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Hello Paul,The first stage is a pentode, so the Miller cap is negligible. As for the other things you mentioned, there is a detailed exploration, which covers some of your points, by Dave Slagle at:http://www.intactaudio.com/forum/viewtopic.php?t=102...
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Romy,Dave Slagle at www.intactaudio.com does a lot of projects of this nature. I am sure he would be able to make something to your specifications.Adrian...
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jd: I'm celebrating the 1 year anniversary of my order for custom transformers from AE Europe.It suits me fine that they haven't delivered (because I don't have the $ now), but you may want to be ...less than overly optimistic.I don't know about...
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T,Agreed on the mumetal - it's wonderful stuff for transformers, just wish you could get it in the required core size for big outputs (well, maybe the US DoD can). Heavens know why AC spend a fortune on silver on an iron core.RE: the Slagle autoforme...
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I have an anal fantasy of a full silver path from the cart to the grid of the input stage.This brings me to finding an ambitious silver wound SUT. There is Slagle who can make it,but I'm inclined towards amorphous/nanocrystaline core, so there is Lun...
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Well, as I see it, one can consider the voice coil a primary and the field coil a secondary of a big transformer.I can see how a low voltage coil with low resistance via the PSU (which batteries certainly have) could therefore sound different from th...
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thanks for your replies. Paul is quite right. I'm not new to audio forums and know better than to post such an unfocussed question with no background. It was a combination of being impressed with the immediacy, detail, and scale of my friend's system...
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Paul, thank you for your input![quote user="Paul S"]I think with the SUT the "dynamic" loading the cartridge "sees" may swamp the choice of wire metal. Once the loading is dialed in, silver might be nice. [/quote]Yes Paul, absolutely agree--the ele...
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So, it has been a while. I have DSET/Macondo in stereo now although there is still some work to do to finish it and tune it to the room. As discussed earlier in this thread I need a preamp with gain and the Placette is just not cutting it for me (n...
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Hi Anthony,
Thank you for your reply & explanations.
I actually need only a buffer, perhaps 2x as my Yamaha B2 is very sensitive, but I need a good one. I have right now Yamaha C2 just to have anything and I ...
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[quote user="Romy the Cat"]I think it might be very interesting to introduce the high-pass filtration for tapped horn and to see how it behaves. It is not only about thermal overload and restriction of excursion. The unloading of none-used bass gener...
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on 1) & 2); by "digital experiments" I meant "get a cheap digital crossover and try different slopes; on 3) & 4): Dave Slagle, Intact Audio, knows a LOT more about transformers than I do, and the nickle autoformers I got from him wo...
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Hi,[quote user="cv"]RE: the Slagle autoformers and their lower than S&B inductance, that's a deliberate design choice on his part.[/quote] I am aware of that, however DS does not make that unneccesarily clear to potential customers... [quote...
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Thanks, Adrian, as I underused the Dave Slagle is autoformer guy. I have no needs for autoformers as I need purely restive load. I fact it is not big deal to find switch, it is complicated to find a ready to go attenuator. Mike Percy care many ...
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[quote user="DHT4ME"]Romy if you feel that you are not loading the tubes enough put a 16ohm power resistor in parallel w the S2. this will cut the load line in half. It should be less wiry and stronger more weighty sound. Obviously you might experime...
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Hi Roman... you know "... but Twogoodears normally prefer a do not go to depth..." it's not an hide & seek kind-of-thing, but a necessity;-), as I'm not technical inclined or taught enough to discuss in depth of circuits designing... I'm only a u...
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Thanks Romy.I have secured a couple of pair of YO186 and some 1940's Sylvania 45's to play with. I wish the YO186 were easier to come by but I think that I now have enough for me to get a very good idea of the capabilities of the tube and circuit, a...
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Hi,[quote user="dazzdax"]Thx for this well written and highly educational piece Thorsten! It appears that Romy is not very fond of the Audio Consulting transformers, could you give your opinion regarding those? What is your opinion regarding the use ...
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[quote user="Romy the Cat"]There are no good ready to go transformer for 6C33C. Tangos are garbage. The 20 years back Tangos were OK for small tubes but Tango is long gone and whatever crap they label by Tango in fact Chinese transformers agglomerat...
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Hi Romy,Agreed about the S2 transformer being the most prominent it is here I think that mumetal will shine. I should have said that I was referring to the upper S2 covering 1k-12k or so. I wasn't too clear earlier - when I suggested rolling of...
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[quote user="serenechaos"] on 3) & 4): Dave Slagle, Intact Audio, knows a LOT more about transformers than I do, and the nickle autoformers I got from him work so well, I totally trust his (and/or Jeffrey Jackson's) judgment to over my "guess...
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[quote user="harold"]thanks for your replies. Paul is quite right. I'm not new to audio forums and know better than to post such an unfocussed question with no background. It was a combination of being impressed with the immediacy, detail, and scale ...
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[quote user="Romy the Cat"]So, you feel that high voltage filedcoil do excite the electromagnets driver somehow?[/quote]I will not call this exitation, let say it dynamic stability.[quote user="Romy the Cat"]What voltage you feel is appropriate?[/quo...
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Hi!
Stefano just made me aware about this forum, so I registered. Interesting thread about LCR RIAAs, one of my favorite topics :-)
About the gain of the WE437 phono: Since Stefano wants to use external MC step ups, I designed the phon...
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After eons of construction, I've finally completed my version of the 801A premap, based on Ale Moglia /Bartola Valves design with his Gyrator anode loads, SiC bias and Rod Coleman filament supplies. 6 inputs, switched by an Elma switch and Dave S...
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[quote user="N-set"]
Hi Anthony,
trying to copy a known good solution - too little time for experiments recently.[/quote]Well, Romy had great results with the Placette and his Dannoys, so that is the known good solution as far as I am con...
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This post is a continuation of my late desiccation with Chris from:
http://www.GoodSoundClub.com/TreeItem.aspx?PostID=9641
David Slagle have made the OPT for YO186
http://www.intactaudio.com/forum/viewtopic.php?p=3560
Ideally I would like to try ...
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Be careful to relieve me if I am not impressed, many promised no one excelled. :-)
Chris, I do not think that you will see me to think about transformers for other channels. I do not think that what I do will be some kind of resolution for Amor...
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