|
|
| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
|
|
 |
|
|
|
|
|
[quote user="Chirag"]The 6E5P is an interesting device (I did some research after you dropped the "tetrode" hint and bought a few :-)), but the bias scheme with the OA2's is still incomprehensible to me. [/quote]Ok, I will try to explain.
The...
|
|
[quote user="rafaroxlm"]As you may know the 7788 is a high transconductance pentode which should in theory be able to give higher audio resolution than say 12AX7, 6072 tubes in tube mic pre designs. On search here the 7788 was mention...
|
|
Yes. I’m exiting to see how the new horn I shaping up. Still I do not think that it is about second orders. Obviously in context of 5 channels system, the more channels one gets then less room between them. I still feel that in order to do it c...
|
|
[quote user=" browellm from hifiwigwam"] "not your typical DIY moron". High praise indeed from Romy there… [/quote]
OK, I would like to make a commentary on the subject. I know that people who love to chop wood at DIYAudio site would consider...
|
|
[quote user="ayebee"]I’m probably suggesting the obvious, but have you tried adjusting the crossover component values on the fundamentals and MF-channels? On the fundamentals-channel, increasing the inductor-value, and decreasing the cap, so that...
|
|
[quote user="Johann"]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.Th...
|
|
[quote user="Romy the Cat"]
It look like the project progress well. I have a little concern
about heat the will be building up in your PS enclosure. I do not know what
kind ventilation hole you have in there but be advised that it will be quite
...
|
|
Domidaw, I am not sure if I will be wrong if I say that this amp was first electrical device I build also. so I went over the same problem as you are going. trust me I made a number of ridiculous mistakes as well and so many times I call to peopl...
|
|
[quote user="drdna"] Not that the sound is bad, but my technique must be bad. Because sometimes during the day the sound will get really particularly bad, even to the point that it sounds like clouds are passing by over the music, if you unders...
|
|
[quote user="Romy the Cat"]I think it takes around 60 seconds on my amps. I have 2 minutes delay for high voltage, so it all within the limit. [/quote]
That is good to know Romy. It was quite frustrating when I tho...
|
|
[quote user="jessie.dazzle"]As a way of forcing myself to see the thing as a whole, I will start by converting this schematic to a 3D CAD model, illustrating each component and its relation to the others (with more distance between the parts than in ...
|
|
[quote user="Romy the Cat"]However,
if I did it again then I would not do it in context of multi-channel amplifier
but rather I would make a maket amplifier able would test my ideas with it. [/quote]While I do like the idea of experimenting with MF...
|
|
Brooks Audio is a reseller somewhere in Utah, I think he is Ale Acoustic US rep. Utah is reportedly a some kind region in US between Massachusetts’ Tanglewood and California. It looks like Kevin Brooks is moving and he is selling his Acoustic Sys...
|
|
Hi Thorsten,
Interesting preamp ideas.
The Silvaweld is also using some rather interesting ideas. For
example, the power supply is all tube (ie. rectrifier and regulator)
with a large choke as well for filtering and using a 300b as the hi...
|
|
This thread has been pretty interesting overall. I've read most of it and would at least like to provide some feedback on the technical side of designing with the 45 and 2A3 DHTs... at least from my personal experience. A few years back I decid...
|
|
[quote user="drdna"]
Romy the Cat wrote: My attitude with my main TU-X1 is “do not harm” as I pretty much have no complains of frustration to it’s sound and I would be pity to loose what I have now from this tuner. I have some people tol...
|
|
Dear Romy,
Thank you for the commentary and the advice with regards to the need to have a COGNITIVE ORDER OF SUCCESSION and to test with another speaker in situ first.
Given the varying degrees of how different individuals process COGNITI...
|
|
[quote user="Romy the Cat"] anthony wrote:I am not sure how large to make the filter caps for
the DHT channel. At this stage I think I will start at 3000uF and perhaps
try altering it a little up or down once the system is stable. Hm, it is depend...
|
|
[quote user="anthony"]Can you remember what caps
you used in the HF filter? They are certainly not standard values and I
do have a memory of you trialling air caps. [/quote]
I presume you ask about the F amplifier channel. I use air
caps 530pF...
|
|
OK, here are my thoughts for today. Below is a very simplified schematic of Pure Power 2000 regenerator. I do not know if it is, but I think that it is how it works. I do not think that it is different from any other on-line generator. At the li...
|
|
[quote user="guy sergeant"] In your earlier piece about how to use the S2 'properly' you wrote
"Whatever happens between the 400 and 2,5 is pretty much unnecessary for you garbage. So, get any known to you soft capacitor of 3uF and place it in serie...
|
|
[quote user="Tax"] Given the varying degrees of how different individuals process COGNITIVE ORDER OF SUCCESSION there will be differences in between how the plumber Vs a brain surgeon handles COGNITIVE ORDER OF SUCCESSION. I guess on some things...
|
|
I was asked for more information on my power supply regulator, which allows the original 100V power line (Japan) to be plugged directly into a 120V line (US), while greatly smoothing the ripple going to the motor.
...
|
|
[quote user="anthony"]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 ab...
|
|
[quote
user="anthony"] Firstly, the -200V Bias supply takes ages to come up
to voltage but it does get there...no issues for the +200V side, it charges is
200uF caps almost instantly, but 9,000uF on the negative side takes almost 90
seconds to ge...
|
|
It look like the project progress well. I have a little concern
about heat the will be building up in your PS enclosure. I do not know what
kind ventilation hole you have in there but be advised that it will be quite
hot. In worst case you mig...
|
|
**** For
the 30h do you change r23 to like 42k? the arrow from r23 to l1 seems to
imply that r23 depends on the choke. does this effect r2?
Yes,
they are related. the R23 in the supply of the driver state is just a ble...
|
|
[quote user="drdna"] I know all the compromises involved with the EdgarHorns, I have heard them when I visited Bruce Edgar in Gardena, and they were pretty good compared to most of what is out there. I realized that I would likely never be able...
|
|
Gintaras, basically it is not bias voltage
problem but voltage drifting +-10mV with preamp disconnected. The 10mV is absolutely
irrelevant voltage. You see, the gas tubes are voltage stabilizers but they are
not as precise as the SS stabilizers. T...
|
|
[quote user="Wojtek"] Well, Roman and others I think you are going a little to far with this. Don't tell me that you took everything in my PRIVATE email to you serious because I'm going to think that you're living in the conspiracy world. Actually I ...
|
|
|
|
|
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: |
42,880,444 |
|
|
|
|
|
|