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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Every resistor, capacitor, tube, etc. are just physical devices that are optimized to come a bit closer to an ideal device -- a wirewound resistor may represent an ideal resistor, but it has inductance, capacitance, and other electrical and physical ...
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Up to the first fold the horn is somewhat conical as seen in post #1 picture.This picture shows the exit w/ additional angle wall (making for "corner" loading).This has a greater (uncalculated) flare something like a compound CD horn.Resonant F unkno...
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[quote user="cv"]I don't see how the cartridge inductance is doing anything as far as that schematic goes.There's another thing *very* wrong with it as well, but as you're not going to pursue it, we can leave it at that.[/quote] Possible, I posted it...
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Hi Romy,i want to use the 6E6P-DR (triode mode) as driver in my tube 45 amp.I use a D3A (triode mode) with Anode choke at 180V, 12mA. Grid 2 is connected via 50 Ohm resistor to anode. Grid 3 (pin 8) is connected to cathode.The 6E6P-DR (also 6E6P-E) a...
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[quote user="Romy the Cat"]I think it is about right. The 6C33C for upper base has 100K
biasing resistor and 20K to ground in Lpad. That would make ~60Hz. This high
pass that unload the LF from the horns that it can’t handle is very important
as y...
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Thanks Romy,It is now fixed. I have left Channel B the same apart from adding a 390k positive bias resistor on the positive signal line (between C1 and R5) connected to the 14k resistor that also connects to Channel C and F. A 402k would have been ...
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R22 is there to drop the B+ to the correct level and needs to be rated so it can dissipate quite a bit of power i.e. heat. It is 12 watt in the schematic but maybe the one you are using is rated lower or perhaps you have a higher secondary voltage o...
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Thanks for sharing, Romy! "Micro" and "macro" "schematics" would be a nice adjunct, to show how you hook up electronics and speakers, as well as speaker positioning. Of course, lots of recordings are treated with synthetic reverb, so those are gettin...
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The lower bass configuration in my room is a bit interesting below is the bass diagram (under 50Hz)
As you can see the allocation of hot bass sports is superbly favorable in the room. There is pretty much no bass anywhere in the ...
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Dear Romy,The UPS units are being used in their normal way, as line interactive. The voltage waveform supplied by the Powerware 5115 is a sine wave. This is described briefly in the manual and was important information for me pre-pur...
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The Sakuma schematic the was presented in there: http://www10.big.or.jp/~dh/msm/msm3.html…was not the one that I referred in my comment above. The bi-amp that seen/heard in Sakuma place was different. The one at the picture above is legitimate way to...
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Ever since the Melquiades schematic was published, I have been planning to build one, because the objectives and topology seem like they would work for my system. Unfortunately I am very much not a DIY person. Even though I have built my ...
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It is wonderful how these forums work and how it's members provide the feedback and comments from their experiences and expertise.I am 90% convinced that the DEQX will not provide the magic spatial sound that I am looking for with the Edgarhorns....
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Hi Romy,Its good to hear you are now getting this horn to work more as you'd wish.Perhaps Vitavox weren't such barbarians after all?!!!CN458 Schematic (500 Hz)
What values are you using?rgs,Guy...
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[quote user="Wojtek"]I have a warning that 60 years old Tannoy 10" red crossover is a sealed unit you won't be able to update and that nobody has the correct diagram of that crossover since Tannoy archive was consumed by fire.[/quote]I have a pair of...
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Yup i think i will use ac for filament,in my mind i wan't to copy and build the structure of melquiades ,so i don't need to recalculate anythink,only follow the stream, but maybe if i use 6,3v filament(i see melquiades use 12,6v) i must change someth...
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Yes, it is built according to the schematic, but by someone else, from whom I have only just received it. The opt is custom-made nanocrystalline amorphous core, gapped at 300mA and running 200V/240mA.It is quiet, precise and very fast (which last the...
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I do not nave, neither I see in the schematic, a resistor
but rather an Lpad shunted with two resistors, exactly how I described above....
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Interesting, decoud. If you build the exact schematic of Milq then share your experience about the building process and the final amp calibration. Did you detect any need to make any correction to hit the right operation modes? What OPT you used? The...
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Romy, I appreciate that this is an old thread now and that you may not remember everything from your time developing these amplifiers, but I have a (hopefully) simple question about the upperbass crossover in the schematic above. All other channels ...
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I will say that I agree with what you have said, Roman; that DIY'ers most likely to build the amp are probably a bit anti-Romy. Too bad, I always say liten first and then comment. Too many people in audio get wrapped up in the theory and ...
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Options are limited here... looking at the schematic, you're sorta pinned in by the biasing topology used. One typical method would be to use a resistor divider network at the input grid to the 6E6P. Problem is, this results in a huge bias offset. By...
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Thank for the link. I did not see it is it does look interesting. II like those crazy, unreasonably-obnoxious, no hold barred projects and they usually do push the envelope of what is possible. I did not have a chance to read the whole thread. We hav...
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Scott, my apologize, but issue of low-power does not have any relationship to the problems, you have described. The problems could be located in the following areas:- high output impedance of the last cascade, and amplifier in g...
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Hello to all, After following the comments of Romy for some time (have learned a lot, thank you), I would like to ask a question on this subject.This circuit is built with resistors, diodes and capacitors. Could someone elaborate how it can produce a...
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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. Same thing happ...
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Today I replaced the problematic pair of Chinese 7 pin sockets on one of my ML2s. It looked like they were replaced at least once before, and that my job is at least the second set of replacement sockets, so three total counting the OEM pair. There...
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Hi Romy,On my to-do list is a single ended version of the F5... essentially just the upper or lower half of the schematic, with a load resistor to opposite power rail (or perhaps a low DCR SE transformer) replacing the complementary portion.Alas it's...
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Romy, No easy drawing program available this second (traveling for 3 weeks) but I can send you a simple schematic in PDF if you like via email. In any case, to adapt what you have already have to the split biasing, just remove the cathode bias resis...
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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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