Search found 11798 matches

by Nick
Wed Aug 21, 2019 11:40 pm
Forum: Speakers
Topic: Fane 12-250TC Retro Speaker.
Replies: 282
Views: 28481

Re: Fane 12-250TC Retro Speaker.

I would think that adding the effect of a mechanical filter after a mechanical cone breakup would be hard to do in DSP on the input side. But much is possible. Guitar cabinet simulation involves mimicking the effect of cone breakup. Cant help thinking it would take more than a simple filter curve.
by Nick
Tue Aug 20, 2019 2:43 pm
Forum: Beginners
Topic: Help interpreting 2nd/3rd Harmonic values on WE datasheet
Replies: 11
Views: 125

Re: Help interpreting 2nd/3rd Harmonic values on WE datasheet

s'funny...I don't have a phone and for some reason I keep thinking there are others like me, that don't have one..... You have a good point, but you did post a solution that requires access to a computer connected to the internet... My original solution can be done with a slide rule or set of log t...
by Nick
Tue Aug 20, 2019 11:32 am
Forum: Beginners
Topic: Help interpreting 2nd/3rd Harmonic values on WE datasheet
Replies: 11
Views: 125

Re: Help interpreting 2nd/3rd Harmonic values on WE datasheet

TBH, I just use a scientific calculator on my phone to do the conversion I posted. Yet another thing that phones have taken over.
by Nick
Tue Aug 20, 2019 10:50 am
Forum: Beginners
Topic: Help interpreting 2nd/3rd Harmonic values on WE datasheet
Replies: 11
Views: 125

Re: Help interpreting 2nd/3rd Harmonic values on WE datasheet

So if we call the dB value above x

y = -x/20

z = 10^y

Percent = z * 100

So, x = 40 in your list,

y = -40/20
y = -2

z = 10^-2
z = 0.01

Perc = 0.01 * 100
Perc = 1.0%

Or take 48dB
y = -48/20
y = -2.4
z = 10^-2.4
z = 0.003981
perc = 0.003981*100
perc = 0.4%
by Nick
Mon Aug 19, 2019 9:53 pm
Forum: Beginners
Topic: Help interpreting 2nd/3rd Harmonic values on WE datasheet
Replies: 11
Views: 125

Re: Help interpreting 2nd/3rd Harmonic values on WE datasheet

Yes, so for example 40dB is 1%, 20dB is 10%
by Nick
Sat Aug 17, 2019 10:27 am
Forum: Everyones Projects
Topic: Inverted OTL with 6SN7/6AS7
Replies: 93
Views: 4463

Re: Inverted OTL with 6SN7/6AS7

Yep.
by Nick
Fri Aug 16, 2019 10:45 pm
Forum: Everyones Projects
Topic: Inverted OTL with 6SN7/6AS7
Replies: 93
Views: 4463

Re: Inverted OTL with 6SN7/6AS7

Mike did something similar (Without rectifier) some years ago.
by Nick
Fri Aug 16, 2019 9:56 pm
Forum: Everyones Projects
Topic: Inverted OTL with 6SN7/6AS7
Replies: 93
Views: 4463

Re: Inverted OTL with 6SN7/6AS7

Don't think so, I was referring to the
but there is someone working on an HV version (I think around 450V).
As not covering the voltage range (for example) I may use.
by Nick
Fri Aug 16, 2019 8:03 pm
Forum: Everyones Projects
Topic: Inverted OTL with 6SN7/6AS7
Replies: 93
Views: 4463

Re: Inverted OTL with 6SN7/6AS7

They should be fine with any current requirement we're likely to ask of them for audio projects.
But not voltage.
by Nick
Mon Aug 12, 2019 8:47 am
Forum: Everyones Projects
Topic: Inverted OTL with 6SN7/6AS7
Replies: 93
Views: 4463

Re: Inverted OTL with 6SN7/6AS7

I won't use the TVS diodes because they change the sound
I have tried and failed to use TVS diodes in the signal path for overload limiting. Never works, I assume there are some capacitance (and probably non linear) in there.
by Nick
Sun Aug 11, 2019 8:27 pm
Forum: Assorted Stuff
Topic: The Audio-Talk Motorcycling thread.
Replies: 488
Views: 43027

Re: The Audio-Talk Motorcycling thread.

I just was happy having an excuse to post a bonzo link.
by Nick
Sun Aug 11, 2019 7:07 pm
Forum: Assorted Stuff
Topic: The Audio-Talk Motorcycling thread.
Replies: 488
Views: 43027

Re: The Audio-Talk Motorcycling thread.

Closest I can get

by Nick
Sat Aug 10, 2019 7:33 pm
Forum: Everyones Projects
Topic: GM70 PP
Replies: 67
Views: 2248

Re: GM70 PP

IslandPink wrote:
Sat Aug 10, 2019 6:44 pm
Nick wrote:
Sat Aug 10, 2019 6:11 pm
.... If it doesn't agree with experiment, it's wrong. Richard P. Feynman"
Now then Nick - remember what we said over email, about citing Richard Feynman against people in an argument ?
Not sure I was citing it "against" anyone (other than myself), and I am not sure I was even arguing :-).
by Nick
Sat Aug 10, 2019 6:11 pm
Forum: Everyones Projects
Topic: GM70 PP
Replies: 67
Views: 2248

Re: GM70 PP

Sometimes a little more complexity allows for simpler and therefore better operation. Or, sometimes more complex is better full stop. Without needing the mental gymnastics making black into while so it fits in with a dogmatic position. "It doesn't matter how beautiful your theory is, it doesn't mat...
by Nick
Fri Aug 09, 2019 10:48 pm
Forum: Everyones Projects
Topic: GM70 PP
Replies: 67
Views: 2248

Re: GM70 PP

But I also read the grid acts like a diode under these conditions and so I can see the AC might be only in one direction and so as you say, it charges up.
Once the grid goes positive, it becomes an anode.