|
|
| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
|
|
 |
|
|
|
|
|
Paul, below is the Axiom. I must say I've never heard it nor know anything about the objectives behind the amp. I've just found the topology very elegant and appealing. As far as I understand, the diodesare used for biasing rather than resistors beca...
|
|
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...
|
|
We know that speaker surrounds are subject to memory effects. Is not playing the speaker (keeping the voice coils warm and surrounds elastic) not the big part of having to warm up the system?With power supplies containing modern diodes, caps and resi...
|
|
The grounding I have employed is a mixture of a "local star" and GND plane (I've obviously copied it from the Cat).I did pay a lot of attention not to have loops. Here is my grounding scheme. I wonder if there are any obvious errors?There is a switch...
|
|
[quote user="Romy the Cat"]I think that you did not exactly my version but made some modifications; I do not know/remember what they were. [/quote]CCS heating of the tubes based on LT337A, 2x0.47u+470K at the output,my filtering is a bit bulkier at ...
|
|
A slightly lower filament voltage is okay for a coated filament (not for a Thoriated-Tungsten filament however). There was some testing done some time ago on this and findings indicated an increase in tube life and lowered distortion. I just don't re...
|
|
I'm way too lazy to double check the math, but it looks on the face of it like the 6N6P is one answer to the numerical problems you've posed so far.As for sound, I would prefer the best 6SN7s. But who can find them and who can afford them, once they...
|
|
I have coved this subject in past. I was not able to find a solution how to add resistors to change loading and how to make it to be switched that would not degrade sound. So, my own phonocorrector has no adjustable loading. If I need to do it I woul...
|
|
This thread is split from the following thread:
http://www.goodsoundclub.com/LatestPosts.aspx?ThreadID=2665
Jessie, I hope you do not mind that I pulled it to the forum explicitly dedicated to the Melquiades Support.
5-channels Melquiades is ...
|
|
Hi Romy,I wish I had seen your post on Placette before buying mine. I didn't realize that there is no balance control on the unit. I know in theory this should not be a problem, but I miss this feature for several reasons. Can't hav...
|
|
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...
|
|
I like having a center-tapped filament winding for flexibility. First, you can use a traditional approach on hum balance (what you have now) or use a slightly different approach. I use the center-tap as a fixed DC balance (cathode bias resistor solo...
|
|
My new 20L and 30K L-pads for the 6-chenals Super Melquiades’ tweeters and Injection channels. They are 24dB down by 1dB, made on the Elma Rotary switches and stuffed with unavoidable RB60 resistors. I did not want to burn my fingers and outsourced t...
|
|
One supposes good sound, but... come on, they can't be THAT good (can they?)...http://www.partsconnexion.com/catalog/CapacitorsFilm.html Deulund tabs on the bottom of the pageThey also say Jensen on them, meaning, I ass-u-me, that J...
|
|
I have to say, I never gave it much thought, since, as you say, The Book says 5751s are an OK sub for 12AX7. I did realize that the gain was lower, but I obviously had a brain cramp in not interpolating the lower gain to "redistributed" global ...
|
|
is what I have called it, and what I hear you are describing? I wonder for how long you will be OK with it. We have had this effect by using 1st order crossover with absolute minimal insertion loss, so you would now listing to uncorrected drivers in ...
|
|
Likely, whatever you do with subs will include a big coil, and caps and resistors, too, if to make a steep filter to "match" the Dannoy LF "roll off". The sub(s) might be tailored in terms of correct SPL to blend with the Dannoy at the X/O point, and...
|
|
Not sure where you live, but near large cities one can rent "pro" sound equipment. Once you have your end game figured out in terms of architecture you can just plug in the Board, find and note your X/O configurations and values, then make up and in...
|
|
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:
...
|
|
They chase numbers because numbers is the only thing you can unambiguously compare. The model for evaluating feedback equipment ought to be musical instruments: that it is not perhaps tells us that most of the time audio equipment is not used to repr...
|
|
And there is no substitute for listening to it, no matter how careful the "calculations". Anyway, I don't have it "figured out", that's for sure. Some guys figure in and use the inductor DCR in lieu of resistors (apropos), which seems clev...
|
|
Anthony, congratulations on getting your project to this point! I mention without referring back to your schematics, I think you will be glad to have test points, along with variable resistors (trim pots) to re-set operating points, as needed, if on...
|
|
OK, I read the blurb. Now that the cat's out of the bag, and we know it's just a resistor ladder, why not use... a resistor ladder? Gotta hand it to those "MIT" guys, also I think there's room yet for upgrades. How about a deluxe, super-limited, l...
|
|
This is quite recent conclusion, as I sick and tired to do not say it finally!
A loudspeaker must have a volume control that will adjust an amount of HF that a loudspeaker radiates into listening space. I playback systems that has an excessive 1/3 d...
|
|
[quote user="Romy the Cat"]That is a good question and I asked myself it numerous times. My current standing is the benefits are purely intellectual as I am not able to observe the applied benefits. [/quote] Recently I got eventually the box (th...
|
|
Hi Skushino,1) In your post above regarding certain(?) of Bruce's products, can you please identify *what* crossover parts you received or heard (in context of given system) which you feel are "low quality" ..?2) Which model & ...
|
|
[quote user="Romy the Cat"]The wire, the coupling caps, the cathode resistors and many other things are superbly important but it is after the strategic topology is settled. In my view caps, resistor, wire and other things are responsible for the sou...
|
|
Romy, I am not clear why you would worry about DC if you can set the RC where you want it and mute input.Biggest problem, of course, is HF, since it takes bugger all to blow those ribbons. But I thought you had that variac that the Serb gave yo...
|
|
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....
|
|
I Forgot they did this. I only have experience with se driver stage. You would remove r3 and c1. change r2 to 10k and put the bias voltage from the gas tubes across it. I would try just regualar zaruthstra srpp circuit first. Like do you know it wi...
|
|
|
|
|
All context of this site except the Forum's posts
Copyright © Roman Bessnow 2004-2024
All messages within the Site’s Forum Copyright © by
authors of the posts
|
|
Last 24-hours posts: |
0 |
|
 |
|
|
Total human visitors: |
42,882,232 |
|
|
|
|
|
|