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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Ok, I made some further experiments driving this time my S2 driver from Milq DH DSET. The hell of the sensitively - it was too much. So, I went for 4:1 inner-stage ratio. The result was very successful and the amp looks like was able to get more...
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[quote user="cv"] Consider a triode connected 13E1. 95W dissipation, will probably work beautifully with the existing OPT if you adjust the gap down and if you can rewire your arrays to present a somewhat higher impedance.Something like 400V-450V / 2...
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Jim, returning back to the subject of tube testing….
I do not know if you have seen my most recent obsession; the idea of driving my Macondo with 1.8W of a single 6E5P:
http://www.goodsoundclub.com/LatestPosts.aspx?ThreadID=4241
So, what I learned...
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[quote user="anthony"]I did finally manage to get a day and a half to make the second DSET operational but it refuses to bias correctly. I've traced the circuit a dozen times, checked component values, tried to find shorts, checked cap polaritie...
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I was searching for an answer why squire wave is so screwed and I was advised by the site’s visitors that it is due to HF restriction of my channel. My HF response does look too low to me – the 23kHz; with all my ultra low capacitance magnetic I ...
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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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Ending up re-amping my MF channel, I found myself at unexpected situation that I am not completely compostable with Macondo HF. It is not that the HF are bad but they were made to serve the interest of older, slightly softer operating single-stag...
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I do not have a lot of equipment that uses vacuum tubes I have a phonostage and power amp that are tube based. The phonostage used 12AX7 that in there from 1999 and I think they will survive me. The power amp use gas tube 0A2, the output triodes 6C33...
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Although the spiritus movens of the whole idea seems to have found thebass solution, the idea continues to live.Thanks to the invaluable help of Stephie B, I've comeback to the GU81M likea boomerang with some progress. There are 3 new things:1) FFT v...
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I do not know why people go into low-sensitive loudspeaker and they go crazy in order push the last drop out of the class A2 operation. From a different perspective the Macondo’s woofer towers with 97.5dB sensitivity are low low-sensitive loudspeaker...
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[quote user="be"]Could you tell a bit about how does this:
"I end up with 360V on B+, 15K plate load, grounded cathode, 160V on plate and -3.5V on grid via a series battery."
sound as compared to the normal Milq bias?[/quote]
I did the following. ...
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Ok, I have both channels up and running and it looks like it is almost it. It left only re-measure everything , properly calibrate and tune up the port. So, how is it?
The project is success, it sound very pleasant and not anion for non-critical lig...
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Jim,
It is miniature tube that can handle 8W on plate!!! Still the most interesting it’s sound as triode. If you look its internals constriction then you will see a pair of huge “plates” and a large space for the “electron cloud”, it kind of in a w...
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[quote user="Romy the Cat"]Celsius, I do not know what CCS you impended, did you drive 6e5p’s plate with constant current source?*1 I also do not know/like 6e5p with battery bias. The only application that I find 6e5p suitable was the Milq-style bi...
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[quote user="anthony"]Looks like I
spoke too early. When I made that statement I'd only tested the voltages
in the DHT Channel and they were pretty close to correct...but when I put a
tube in there it glowed a little too hot so I quickly shut it ...
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Anthony and Romy, thanks for taking the time to respond to my question. I want to take on this project as a learning experience both in terms of simply building an amplifier from a schematic and for my edification on sound reproduction.
I’m starti...
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[quote
user="anthony"]First was the issue with the 6e6p for the HF
Channel not being able to draw enough current. I checked the bias and it
was fine and the potentiometer allowed plenty of adjustment so I changed
nothing in the circuit. A new ...
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[quote user="drdna"] I think this 2A3 must have a specific set-up to sound its best. You have not found it yet. To begin with and familiarize yourself with the sound of it, I suggest sticking with the topology that has been tested by amplifier design...
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[quote user="anthony"]Thanks for your
thoughts Romy. Last night I roughly wired in some random crossovers….[/quote]I
wrote a loooong replay to you after that post but my 2.5 yo son turned off my computer
while I was posting it. Hate to rewrit...
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I have to admit that although the Macondo “Water Drop Tweeter” sounds very good but I do not have that “shocking sound” that I got from the “Water Drop” during my initial introduction to it. I kind of always felt it and I thought that I get use t...
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Okay... I also downloaded the original Milq SET amplifier PDF and have looked at it in detail as well as the 6-channel adaptation (DSET) and I understand where you're going with it... or so I think. In my particular situation, I've owned two pair of ...
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In the thread GM70 vs. 6C33C two year back I have written that the only tube that I would like to trey in Milq besides 6C33C would be YO-186.
I am not sure that it might be a right direction or even interesting direction but I picked yesterday a par...
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Following my recent “new objectives” with tweeters (partially covered in the last posts of the following thread)
http://www.goodsoundclub.com/TreeItem.aspx?PageIndex=2&postID=2791#2791
I lately made quite a few very interesting and very educati...
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It is impossible to make two amp with the same quality with such big difference in output tubes , the transformer design are vastly different, a 10Kohm transformer would never have a good bandwidth as a 600ohm transformer. I just have to experime...
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A friend of mine asked my last night if I feel that PurePower’s Sound as good as a playback during those extremely seldom moments when electrify is good. It was a good question and I feel that it is worth to cover.
First off all I can not say about ...
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[quote user="N-set"]BTW, how stable 6E5P is? I'm asking as I was contemplating biasing the output by the voltage drop on 6E5P's plate choke (DCR is say around 1k),with only some minimal autobias on the output. The drawback is that any drift in th...
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[quote user="Paul S"] Given speakers that can be driven dynamically by single stage amplification, there remain a host of issues, and among those issues is color. Most compression drivers are color-challenged to begin with…[/quote]
I would agr...
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It is not to mention that 6n1p is not very good sounding
tube… It is interesting that you have built Zaratustra with gas driven 6e5p. I
do not feel that it is “most powerful fully pure class A amp in existence”.
Power is power and it is defiled th...
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[quote user="peter foster"] By "dynamic viscosity" do you mean the reluctance of an amplifier to be dynamic, i.e., the degree to which an amplifier sounds like it is bogged down, usually as a result of a poor rise time on transients, i.e., poor HF re...
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[quote user="floobydust"] 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. Yo...
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