Search found 11162 matches

by Nick
Thu Jun 21, 2018 11:26 pm
Forum: Solid State
Topic: even more lateral fets
Replies: 11
Views: 165

Re: even more lateral fets

unforunately my poor little sig gen only goes to about 1.6v RMS so I couldn't find the clipping point
Improvise man, you must have a mains transformer that you can use as a step up or if its a dual primary an autoformer to give you 6dB of gain.
by Nick
Thu Jun 21, 2018 12:49 pm
Forum: Solid State
Topic: even more lateral fets
Replies: 11
Views: 165

Re: even more lateral fets

Heat is always the problem with solid state it seems.
by Nick
Wed Jun 20, 2018 5:09 pm
Forum: Beginners
Topic: hash
Replies: 2
Views: 42

Re: hash

Is it not likely to be 1/f noise?
by Nick
Tue Jun 19, 2018 10:18 pm
Forum: Assorted Stuff
Topic: Ground Loop
Replies: 15
Views: 215

Re: Ground Loop

Earth lift is not in the signal path.
by Nick
Tue Jun 19, 2018 8:48 pm
Forum: Assorted Stuff
Topic: Ground Loop
Replies: 15
Views: 215

Re: Ground Loop

Sorry, still not sure what you mean. The amp signal ground can be isolated from the chassis ground. The metalwork should always be connected to the mains earth with a nice thick cable (less than 0.1 ohm from any part of the metalwork to the IEC earth, and the cable should stand 24A for a minute).
by Nick
Tue Jun 19, 2018 6:38 pm
Forum: Assorted Stuff
Topic: Ground Loop
Replies: 15
Views: 215

Re: Ground Loop

The Back to Back slides fixed the hum, but was diode dependent
Can you explain what that means?

Maybe its worth checking just what size the leakage to earth current is?
by Nick
Tue Jun 19, 2018 6:35 pm
Forum: Everyones Projects
Topic: GK-71 - economical build.
Replies: 482
Views: 38839

Re: GK-71 - economical build.

No much of a problem. You will get a bit more degeneration with the unbipassed resistance, but its unlikely to be a issue.
by Nick
Tue Jun 19, 2018 3:37 pm
Forum: Everyones Projects
Topic: GK-71 - economical build.
Replies: 482
Views: 38839

Re: GK-71 - economical build.

Can you remind me - what was the reason for the resistor pair ? What fil supply are you intending to use ? - because with Andrew's units I can't see the need for a virtual centre-tap. Its back to my burst of maths on another thread. Other than the removal of any remaining noise, it also ensures tha...
by Nick
Tue Jun 19, 2018 8:49 am
Forum: Assorted Stuff
Topic: Ground Loop
Replies: 15
Views: 215

Re: Ground Loop

I am with the engineer. Does the monoblocks hum if you just connect their signal ground together? the simple solution is a isolating transformer, but not idea as its not free. I had a slagle AVC as the pre amp I am unsure. Do you have a AVC now, is that the pre you are using? Is the two output groun...
by Nick
Tue Jun 19, 2018 8:43 am
Forum: Speakers
Topic: Fane 15" full range speaker
Replies: 73
Views: 1349

Re: Fane 15" full range speaker

For what it's worth, it was Thiele who was largely responsible for popularising golden ratio for speaker cabinets back in the early - mid '70s. Nominally it spreads the eigenmodes / reduces their build-up. It's not the only option of course, pretty much any irrational number basis can be used as an...
by Nick
Mon Jun 18, 2018 11:11 pm
Forum: Your Fave Artists
Topic: What Are You Listening To Right This Minute?
Replies: 2653
Views: 129996

Re: What Are You Listening To Right This Minute?

Ant wrote:
Mon Jun 18, 2018 9:35 pm
Gong, properly sat down and paying attention this time.

I appear to have found some specialist music that SWMBO actually doesn't mind. Found her song,

Im happy
I'm not happy
I'm sad
I'm not sad

Cool
Maybe look out for Magick Brother then.
by Nick
Mon Jun 18, 2018 11:10 pm
Forum: Your Fave Artists
Topic: What Are You Listening To Right This Minute?
Replies: 2653
Views: 129996

Re: What Are You Listening To Right This Minute?

And on the CD (and elsewhere you get this) Yeah but, its doesn't work there on that album IMO. I usually like the extra 'bonus' tracks on CD reissues but IMO Ooby Scooby Doomsday is right out of place there at the end of Angels Egg. Its jars against the the closing of 'Eat that Phone book'. Especia...
by Nick
Mon Jun 18, 2018 6:11 pm
Forum: Your Fave Artists
Topic: What Are You Listening To Right This Minute?
Replies: 2653
Views: 129996

Re: What Are You Listening To Right This Minute?

And on the CD (and elsewhere you get this)

by Nick
Mon Jun 18, 2018 6:04 pm
Forum: Speakers
Topic: Fane 15" full range speaker
Replies: 73
Views: 1349

Re: Fane 15" full range speaker

Just wrote some code, if you use rational numbers there are matching harmonics. so using 0.6 : 1 : 1.6 1/L1 = 1.666667, 1/L2 = 1.000000, 1/L3 = 0.625000 3 harmonic of L1 is the same as the 5 harmonic of L2 6 harmonic of L1 is the same as the 10 harmonic of L2 9 harmonic of L1 is the same as the 15 h...
by Nick
Mon Jun 18, 2018 5:56 pm
Forum: Speakers
Topic: Fane 15" full range speaker
Replies: 73
Views: 1349

Re: Fane 15" full range speaker

I think my prime idea is rubbish BTW, there would be shared harmonics.