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The member login at the front page and Boston's local musical events calendar are fixed and operational now...
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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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[quote user="N-set"]
Other changes to come:
- looking for Amperex 0A2 with mesh plates
- will rewire MM input in silver with silver WBT RCA's - it now welcomes my top cart, Decca London Reference with silver AQ Leopard ph...
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Romy, that's sort of a feedback I was hoping for, thanks. Ok, I see the point, with the feedback and R3 resistors. The last loads the loop. I have now there 1W Dale RN65D, guess Z-foils with their 0.25W dissipation won't work.
A...
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I'm wondering if Romy experimented with the feedback resistor quality. His ingenious contribution to the design was to use the purest caps possible as in the feedback loop every imperfection gets amplified. So the next logical step after caps wou...
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[quote user="N-set"]
- considering another red tip 12AX7 for the output but given the change was not big at the input it's more of an itch...a costly one at $275
[/quote]After a second thought actually the output tube is obviously in the feedback...
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Alex, as I wrote I use Z-foils at the primaries of mu SUT's. I'm not sure if colder is the world *I* would use. I'm after immediacy and transparency and this is what they gave me. Also widening tonal discrimination, hearable esp with solo piano. ...
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I think industrial grade Arcotronics KP172 (from RS components ?), film and foil. I use them also as output coupling caps (2x0,47u)
Other changes I've made, not commented in my posts here:
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I was digging in my archives, trying to find what exactly input cap I've put and how. Didn't find that. IIRC I've put two, in V configuration, one output of the HV bridge to mass, another exit of the HT choke to mass. Found some traces of voltag...
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Alex, why do you think you need them? I've never experimented with snubbers at the SiC's directly. I only put two input caps right after the bridge and a dropdown resistor which I use before the input choke. IIRC the value is 10nF/1500V. This rel...
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Just got it (the last copy on German Amazon) and after an initial going through it have same impressions - more of an encyclopedia than a practical guide. Still ind it v valuable, especially in combination with old classics like Leo Beranek and ...
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Thanks for your responses guys. Would be great to learn some practical procedures how to setup a tuner/antenna combo properly.
Any ideas where to find some sort of a tutorial? For example I'd love to learn what are the tuning scope images in t...
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Hi guys,
Thank you for the comments. I'm a complete newbie to RF, long learning curve ahead.
1) Antenna - My guiding was Romy's finding (backed by Dima) that this tuner is easily overdriven with too strong an ant...
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Just incorporated this wonder into my system! haven't heard a live orchestra broadcast yet but even voices from the studio have something special, some magic aura.
This is how I use it:
- cleaned (down to dismant...
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[quote user="Romy the Cat"]
I can talk and write about it for pages but this subject is not recognized as “audio”
generally, unfortunately…. [/quote]
Don't know about the others but I would be very interested to learn those tho...
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I think they were the 1st: https://aer-loudspeakers.com/aer-pnoe/
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Possibly the deepest thought I've come across as to why pursue audio (or actually any other activity). All that we need is in us, we just need to discover it. Fantastic, thank you very much Romy for sharing it.
Cheers,
Jarek
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Anthony, thank you for the explanations. For some reasons you mention, I use C-cores. Loose coupling (pri and sec on the different legs), controlled gap and low emission. BTW toroids do have some "distributed gap" but it's small and uncontrollabl...
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Congratulations on the build!
[quote user="anthony"] Yours uses all toroids, or mostly so, which are more efficient than the EI that I use.
[/quote]
Why have you chosen EI vs toroids? The latter emit less.
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How heavy is the structure to be suspended?...
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As a practitioner of vibration decoupling (stacore.pl), I second the idea. No gel, foam, rubber, etc will work on ULF as high mass + pneumatic mounts do. Pref. pneumatic damped too. I can assist with the design of the suspension. Cheers,Jarek...
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Paul, its all welded and filled with non-dissolvable epoxy. I've convinced Kilian to try to get the cart as close to the optimal technical specs ass possible. Let's see how much he will be able to do. Stich asked for s/n perhaps he can trace w...
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My FR7f has been examined by a Dutch master and the cart is f*cked up thoroughly:
-boron cantilever glued angled with non-solvable epoxy resin
-high tracking dist even when azimuth rotated - someone tried to manipulate the gen...
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But I'm not an imaging or a soundstage freak. I'm looking for a cart specialist in EU to try to correct the geometry. Any reasonable suggestions welcome.
Thanks,
Jarek
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Well, I've heard from one AF1 user some less than a neutral feedback. He was also reporting on one more user not 100% satisfied with the table.
Hence asking.
Cheers,
Jarek
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Paul, not sure if you are familiar with the combo. There is nothing one can adjust apart from VTF, VTA and P2S. Even with the latter I'm bound by the EMT930 arm hole. Smart collar design by my business partner gave me some +/-1.8mm ...
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[quote user="Paul S"]Didn't read it yet, but I will say I never noticed any problems with the AF1[/quote]Paul, do you own one?...
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Today I continued exploration despite the azimuth problem which starts to look serious (either the arm or the cart has a problem and no az adjustment, researching this). Added some VTF to reach 2.70g to give it a bit better tracking conditions despit...
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Paul, thank you but it's of no use. Pls look at the FR combo. The only thing I can do is P2S. To set it correctly the best is laser engraved arc on a mirror surface - waiting for one. And I have a copy of the Dennesen too. But the big problem is ...
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Fi-analy started listening the FR combo! The setup is somewhat haphazard:* P2S unknown - trying to get 231.5mm recommended by the Germans, took the pains and the cost to design and make a special collar but missing a laser engraved protractor to see ...
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t took me 5 freaking years to fin-anally install a second set of SUT's in my EAR834. 4 out of those 5 years was waiting for Tribiute Pieter to make me custom silver SUT's on nanocrystaline core. I even found him the wire. I went boutique and the ...
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You may take a look at GU-80. It's a DHP but some report excellent sound.
I had some ideas regarding it:
http://goodsoundclub.com/Forums/ShowPost.aspx?PageIndex=3&postID=16064#16064
Cheers,
Jarek
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