When I first entered engineering school I was told that there are two kinds of calculators in the world: HP's and pieces of SH1T!
Metalman ... longtime user of HP41.
Metalman ... longtime user of HP41.
metalman said:
Metalman-do not try to cheat auto language mod machine or you'll soon be in SH1T bin ........
besides-Casio was always better in calc making .................😎
Nelson Pass said:
HP49G.
I don't use Casio calculator. It's only for middle school students like Choky.
But, I'm wearing Casio on my wrist. Whenever I read dirital time, I train my brain to work, drawing image of the analog needles . . .
No logic, no theory, just for fun
I have tried four different speaker cables between ZV5 and J-Low:
- Furutech (Japanese brand) (High-price)
- DAXX flat type (Papa’s country brand)
- Audioplus (Babo’s country brand) (Mid-price)
- My DIY cable (Economic-price)
I hear that my DIY cable is very fine, particularly in high frequencies - no grain, very smooth and silky. I made it with silver-plated and Teflon-insulated copper wires (net 1mm diameter), which I bought in local market place selling marginal left-over industrial pieces at cheap price. I just twisted six wires for one cable of 3m length, and used two for + connection and two for – connection. The remaining two wires do not connect the amp and speaker, i.e. one end is open on speaker side while the other end is connected to the earth in ZV5 (not signal ground). The attached picture might explain better. From the picture, if you find out one small bulldog clip, that point is where the earth connection is made by the clip.
My DIY cable pushes away the other three, in sound.
No logic, no theory, just for fun . . . 🙂
Nice week-end!!!
I have tried four different speaker cables between ZV5 and J-Low:
- Furutech (Japanese brand) (High-price)
- DAXX flat type (Papa’s country brand)
- Audioplus (Babo’s country brand) (Mid-price)
- My DIY cable (Economic-price)
I hear that my DIY cable is very fine, particularly in high frequencies - no grain, very smooth and silky. I made it with silver-plated and Teflon-insulated copper wires (net 1mm diameter), which I bought in local market place selling marginal left-over industrial pieces at cheap price. I just twisted six wires for one cable of 3m length, and used two for + connection and two for – connection. The remaining two wires do not connect the amp and speaker, i.e. one end is open on speaker side while the other end is connected to the earth in ZV5 (not signal ground). The attached picture might explain better. From the picture, if you find out one small bulldog clip, that point is where the earth connection is made by the clip.
My DIY cable pushes away the other three, in sound.
No logic, no theory, just for fun . . . 🙂
Nice week-end!!!
Attachments
A real question
In the neighbouring threads, Papa sharpens his words about the strange behaviors of IR P-ch MOSFET. As I used IRFP9240 (with IR N-ch IRFP250N) for my Zen V5, I was trying to hear any strange behavior with my ears. But, I couldn't . . .
I couldn't hear it . . . due to the Source resistors and NF?
By the way . . .
By mistake, changing interconnect cables between my pre and Zen V5 careless, I punched one mono block of Zen V5 to death with a spark of high Vgs. I had to renew all MOSFETs. And, this time I added the protecting back-to-back 9.1V zener diodes across G and S.
After the repairing, I found all work fine, listening to ZZ Top . . .
I bought this CD in Hong Kong . . . The music I like . . .
The CD quality so good . . . found that the mastering was by Bob Ludwig. 🙂
In the neighbouring threads, Papa sharpens his words about the strange behaviors of IR P-ch MOSFET. As I used IRFP9240 (with IR N-ch IRFP250N) for my Zen V5, I was trying to hear any strange behavior with my ears. But, I couldn't . . .
I couldn't hear it . . . due to the Source resistors and NF?
By the way . . .
By mistake, changing interconnect cables between my pre and Zen V5 careless, I punched one mono block of Zen V5 to death with a spark of high Vgs. I had to renew all MOSFETs. And, this time I added the protecting back-to-back 9.1V zener diodes across G and S.
After the repairing, I found all work fine, listening to ZZ Top . . .
I bought this CD in Hong Kong . . . The music I like . . .
The CD quality so good . . . found that the mastering was by Bob Ludwig. 🙂
Attachments
Babowana said:
Nothing new here . . .
All of you might already know this . . .
I just want to inform you once again . . .
To confirm that Zen V5 accepts this . . .
I added this for all MOSFETs of the amp and the PSU . . .
And, I highly recommend this to whom building ZV5 . . .
😎
Attachments
Wow . . . ? Incredible . . . Two thumbs up!!!
I served 11 guests last night at my makeshift home bar.
One guy was a real music lover, without knowing anything about amp design. He recognized different sound from the last listening. Yes, I was sure of it. That time, the system was set up with F1 having a high pass filter at around 90Hz, and the filtered bass sent to J-Low. But, this time, it was set up with Zen V5 having no such high pass filter, and the full bass sent to J-Low, as you might have read earlier, into the tweaked J-low.
He asked me whether the corners were filled with sand. My answer was “No!” I filled in them with polyester fibers. I wondered why he was asking . . . He had a friend who was far crazy with audio. His friend could distinguish different sand sounds. American sand, European sand, sand from sea or river . . . Ha ha ha ha ha . . . Cheers!
Holding beer bottle in his left hand, he was playing air bass guitar with his right hand fingers, tapping his toes, following Red Hot Chili Peppers’ Breaking The Girl.
“Who designed the power amp?”
“Nelson Pass.”
“Who . . . ? Who is that?”
“Amen . . . shut up and forget it. Just enjoy beer and music!”
The night was getting deeper and hotter . . .
“I like listening to this Hallelujah.”
“Ever heard about Jeff Buckley?”
“Mmm . . . don’t remember him.”
“His Hallelujah is the best for me.”
“Really . . . !?”
“I will give it to you tomorrow. Try it and you will cry . . .”
“Don’t forget it tomorrow.”
“Sure . . .”
Dear Nelson,
Thank you very much again for your interest in diyers. Indeed!
I will finish my comment on Zen V5 here, informing every one that if we adjust DC offset depending on room temp from time to time, the sound kills. Wow . . . ? Incredible . . . two thumbs up !!! 🙂
Listening to Jeff Buckley’s Hallelujah . . .
I served 11 guests last night at my makeshift home bar.
One guy was a real music lover, without knowing anything about amp design. He recognized different sound from the last listening. Yes, I was sure of it. That time, the system was set up with F1 having a high pass filter at around 90Hz, and the filtered bass sent to J-Low. But, this time, it was set up with Zen V5 having no such high pass filter, and the full bass sent to J-Low, as you might have read earlier, into the tweaked J-low.
He asked me whether the corners were filled with sand. My answer was “No!” I filled in them with polyester fibers. I wondered why he was asking . . . He had a friend who was far crazy with audio. His friend could distinguish different sand sounds. American sand, European sand, sand from sea or river . . . Ha ha ha ha ha . . . Cheers!
Holding beer bottle in his left hand, he was playing air bass guitar with his right hand fingers, tapping his toes, following Red Hot Chili Peppers’ Breaking The Girl.
“Who designed the power amp?”
“Nelson Pass.”
“Who . . . ? Who is that?”
“Amen . . . shut up and forget it. Just enjoy beer and music!”
The night was getting deeper and hotter . . .
“I like listening to this Hallelujah.”
“Ever heard about Jeff Buckley?”
“Mmm . . . don’t remember him.”
“His Hallelujah is the best for me.”
“Really . . . !?”
“I will give it to you tomorrow. Try it and you will cry . . .”
“Don’t forget it tomorrow.”
“Sure . . .”
Dear Nelson,
Thank you very much again for your interest in diyers. Indeed!
I will finish my comment on Zen V5 here, informing every one that if we adjust DC offset depending on room temp from time to time, the sound kills. Wow . . . ? Incredible . . . two thumbs up !!! 🙂
Listening to Jeff Buckley’s Hallelujah . . .
Jeff Buckley, Grace
After having washed all acohol off me
I played this CD again
I know you have nice Pass gears
You like the sounds very much, don't you
Go out shopping and buy this CD if you don't have yet
Play track 1 to the last
I like his voice honestly showing his inner feeling
Drum, elec bass and guitar also play great musical sense . . .
After having washed all acohol off me
I played this CD again
I know you have nice Pass gears
You like the sounds very much, don't you
Go out shopping and buy this CD if you don't have yet
Play track 1 to the last
I like his voice honestly showing his inner feeling
Drum, elec bass and guitar also play great musical sense . . .
Attachments
Digging blue LED
Blue LED is a fashion
But I have two things to think about
ZV5 has large caps
Power-off doesn't kill the blue LED light right away
The light still stays long
The blue color too bright, giving cold feeling
I want somewhat dim blue
Many altenative solutions must exist around
Hehe, I borrow Papa's method in F1 😎
And, I look into LED datasheet
Hmm . . . Mmm . . . okay . . .
Now, the brigtness is acceptable
Power-off kills the gently glowing blue right away
You see . . . ?
Details attached
R2 becomes variable depending on Vin and choice of R2
🙂
Blue LED is a fashion
But I have two things to think about
ZV5 has large caps
Power-off doesn't kill the blue LED light right away
The light still stays long
The blue color too bright, giving cold feeling
I want somewhat dim blue
Many altenative solutions must exist around
Hehe, I borrow Papa's method in F1 😎
And, I look into LED datasheet
Hmm . . . Mmm . . . okay . . .
Now, the brigtness is acceptable
Power-off kills the gently glowing blue right away
You see . . . ?
Details attached
R2 becomes variable depending on Vin and choice of R2
🙂
Attachments
or I'm crazier than you.........ZM is BAbo than You........
today I measure few blue leds......... 2V8 at 1,5mA is nice ......... even 1mA is pretty good ,but hard to see any brightness off axis.....and- amp have sweeter sound with that additional 0.5mA
today I measure few blue leds......... 2V8 at 1,5mA is nice ......... even 1mA is pretty good ,but hard to see any brightness off axis.....and- amp have sweeter sound with that additional 0.5mA
Zen Mod said:I'm crazier than you.........ZM is BAbo than You........
100% agree 😀
Good night to you
Babowana said:
when we are already at night ......what is transconductance of "yours" J309 comparing to 2SK389?
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