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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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You need to be very carefully with them as they might be anything. I very much doubt that we need any AC line dedicated stabilizers; even though I do feel that it is good to have more or less stable line. The mechanical line stabilizers might be a bi...
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Yes, in case of tube DC coupling line stabilization is desirable but it would serve only practical aspect of locking the operation point of output tube. The way HOW the line was stabilized very much might affect negatively the way how the whole ampli...
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Hi Romy,thank you for your answer. On weekend i will rebuild my amp for the 6E6P-DR. You are right, the tube datas shows that pin 8 is a screen. On D3A pin 8 is Grid 3 connected to screen.I will try it with pin 8 lifted and connected to ground. I hav...
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"You need to realise that the physically larger a Transformer becomes the narrower the available bandwidth for a given construction. Due to the need to handle a lot of "magnetic bias" SE Output transformers become very large, physicall...
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So, what you would have to do is buy a bunch of #9 AWG solid copper wire from China, so it is only 99% pure,acid etch the surface, paint it with tar and wind it up in a snake sex twist. Or pay them to do it for you.The idea is sound, the application ...
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I am categorical but very much not phanatical, it is interesting that you brought phanatisizm in context of Sakuma discussion. I am categorical in the facts about the sound that Sakuma demonstrated, and allegedly continue demonstrate via his “phanati...
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OK, guys, let stop to bite my Master and Margarita hook: this thread is not about all of that but about electricity problems. I brought the Master only as an illustration of some ridicules regarding the PP noise. I spent today another hour, trying to...
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[quote user="guy sergeant"]Some of it, (the current speakers and some of the amplifiers) are in my view, not outstanding. Other items, (the big preamp, phono stage, cartridge, MC transformer, silver cables and largest power amps are exceptionally goo...
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Well it is quite amassing discovers not the fact itself, it is well known, but the amplitude with which the fact demonstrates itself.
I run the “Water Drop” at 12K second order but not against the tweeter transformer but against an 8R voltage divide...
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Romy,
I have always been meaning to ask you why a step-up transformer for a cartridge can be acceptable but a transformer elsewhere is considered detrimental.
Thanks,
George...
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[quote user="Tax"]The other options are to get some custom Amorphous OPT's <50R 350mA 8:1 as per previous posts, or to possibly pair Romy's LF tributes (for sale section) with a pair of Lundahl's in a two channel DSET configuration. The Avantgarde...
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I am looking into building a 45 tube SET amp and I keep reading about how important a good output transformer is. I read that cheaper output transformers like Hammond can be okay for mids and highs, but it will also reduce bass performance. If on...
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Hi!Sorry for not spotting this thread before. I'm the member of this forum and I read it from time to time. I don't know what do you mean with "he is from diyaudio.com site"? I'm member of a few formums and newsgroups but I wouldn't say that I'm from...
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I made today a bunch of experiments with shielding of the MF filtering choke and I have very good progress. I was talking with different people and had a number of good advises (Come one, people the ward “advise” must have a plural form!) The in...
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Nice thank you for the link, see the "lo SE100-1", 169.0 USD for 7Kg, it's cheap and they look good.So I was Happy with my choice of parallel 845 (I was hesitating with GM-70 but after a difficult decision I decided that the GM-70 filament consume tw...
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My main 6 speakers are modified Edgar horns with 105 dB/ watt sensitivity, and the others are overhead emotive speakers with standard 90 dB/ watt sensitivity. There are two JL self powered f12 subs, and 4 self built subs with a sherbourn five channel...
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Well, Chris, my transformer is amorphous type but I would have difficulties to comment about the progress of the burning. For the first couple weeks when “Melquíades” was born I have difficulties to “get” how to load the output stage properly a...
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[quote user="Romy the Cat"]Merlin, Are you saying that your SET is not sensitive to load and a different plate load has no change to the harmonics of sound? Do you say that your output transformer does not straggle with inductance vs. capacitance bat...
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[quote user="coops"]Romy I have read on this forum that you are not particularly keen on the very low output AN Japan ( and Uk ) cartridges, may I ask the nature of your experience with them , have you tried the field coil versions? [/quote] Keith, I...
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Thanks, Keith and Montepilot.
I did have my 7788-7721 phonostage with LCR filter and I always liked it, pay attention - it was 68dB gains with just two stages and with NO step-up transformer. Allnic Phono is 3 stages with step-up transformer...
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Romy,I try to remove the step-up transformers & short the
input grid, the hum has gone.Than, I did next changes:1. Twisted wire from input RCA to step-up transformers. Connect transformers input & output ground directly (not thought ground ...
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I do not have good-sounding high output cartridges; my most high-voltage cartridge is SPU MONO that is 3mV I believe. I have 5mV Grado $300 Platinum Ref that is high-voltage cartridge but is sounds not seriously. My desire to bring my 3mV SPU via my ...
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I used those VPI magic brick sitting on top of the transformer, my audio analyzer tell me that these bricks helped the noise by about 1db, may be the 6 lbs or so weight does damp the xformer vibration, so I leave them on, just trying everything to ke...
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Hi Romy,So it is time to think about the bass output transformer in my DSET. My bass channel will be 8 x 25W/8565-00 each side set in a sealed box and will cover the frequency range below say 100Hz. These drivers can be wired anywhere between 1R an...
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[quote user="Romy the Cat"] I very much doubt that we need any AC line dedicated stabilizers; even though I do feel that it is good to have more or less stable line.[/quote]Well, this is a very general statement, perhaps too general? I'd say that *pu...
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The preamp has the classic tube regulated power supply using 5R4, 6AS7, 6SJ7. It is transformer coupled output and has no capacitor in the signal chain, the gain is about 8db, so it is not a buffer. For convenience, it does has a remote control. It i...
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Allo,Well, the divider may certainly be responsible for some softening of transients - in particualr, what values are you using there?Also, the received wisdom is that silver micas are created far from equal; no experience with them myself but I beli...
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Ok, I said a mistake, I like direct radiator (sealed speakers) too, but I often noticed more dynamic with horn speakers (I like every speakers (if properly tunned) except speakers that radiate with both sight of the drivers (bass-reflex, tapped horn,...
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The LL1627 is fine but it has core size limit. Lundhal is a fast and you might have some “extra” inductance with it as it will have “enough” HF for your transformer. If you have Lundhal then stay with 220mA and the inductance whatever will be left o...
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I sent an email to Brian asking... also about how far down in frequency their largest mumetal core could go.I see why you want those tap options now - essentially you want to be able to load down the 6e5p but still use all the secondary sections. The...
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