Almost gone
These babies are almost gone. Make your mark today. Dont be left out.
http://www.diyaudio.com/forums/solid-state/212460-32-pcbs-available.html
These babies are almost gone. Make your mark today. Dont be left out.
http://www.diyaudio.com/forums/solid-state/212460-32-pcbs-available.html
Attachments
I would definatly take advantage of this great deal if I didnt have a lighter note, a MyRef and a honeybadger on the current project list😀
This is a cool deal, and a great way to create a buzz about your products too. Very clever!
This is a cool deal, and a great way to create a buzz about your products too. Very clever!
I'm IN for 2..
Yes, I want in! 🙂
1. Check to see that there are PCBs left
CHECK
2. Add your name to the list
nakamoomin
3. Indicate number, max 2
2
4. Make a donation of $20 to finance the next free PCBs(You automatically qualify for them) info@harrisonaudiolabs.com
DONE
5. Paypal $6 shipping or send shipping account with a provider such as UPS or FEDEX (PCBs will ship within 24 hours)info@harrisonaudiolabs.com
DONE
6. Pick a project for the next free PCBs from the collection of available amplifiers i.e SYMEF, 1DIFFQC etc(winner will be by total votes)
HAL OPB looks interesting!
- Is there a BoM-file from DigiKey/Mouser/etc available for this project yet?
- Will there be?
Yes, I want in! 🙂
1. Check to see that there are PCBs left
CHECK
2. Add your name to the list
nakamoomin
3. Indicate number, max 2
2
4. Make a donation of $20 to finance the next free PCBs(You automatically qualify for them) info@harrisonaudiolabs.com
DONE
5. Paypal $6 shipping or send shipping account with a provider such as UPS or FEDEX (PCBs will ship within 24 hours)info@harrisonaudiolabs.com
DONE
6. Pick a project for the next free PCBs from the collection of available amplifiers i.e SYMEF, 1DIFFQC etc(winner will be by total votes)
HAL OPB looks interesting!
- Is there a BoM-file from DigiKey/Mouser/etc available for this project yet?
- Will there be?
Thank you for those who have extended their generosity, welcome to the club. What you are dealing with here are evolved amplifiers. All the best.
Those on reserve
Step up.
The best things in life are free because someone paid for them. i.e.
1. Fresh air: Someone took care of the trees
2. An inheritance: Someone worked their sweat off
3. A spouse: Someone raised them up
4. SYMEF, 1DIFFQC etc
http://www.diyaudio.com/forums/solid-state/212460-32-pcbs-available.html
Step up.
The best things in life are free because someone paid for them. i.e.1. Fresh air: Someone took care of the trees
2. An inheritance: Someone worked their sweat off
3. A spouse: Someone raised them up
4. SYMEF, 1DIFFQC etc
http://www.diyaudio.com/forums/solid-state/212460-32-pcbs-available.html
A certain amplifier is leading in the secret ballot for the next (FREE PCB) project. Lets see how the poll will be when it closes 😀 . Thanks again.
Something exciting awaits the final 16
http://www.diyaudio.com/forums/solid-state/212521-amplifier-tasting-group.html#post3020518
You may opt out from being in the steering committee if too busy
You could also nominate replacement
http://www.diyaudio.com/forums/solid-state/212521-amplifier-tasting-group.html#post3020518
You may opt out from being in the steering committee if too busy
You could also nominate replacement
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We have 4 donors....12 to go 🙂
Join now. Don't be left out. Contribute to the state of the art. Be part of the change.
Join now. Don't be left out. Contribute to the state of the art. Be part of the change.
Received my PCBs today, very fast!!!. They are beautiful!!! Thank you Mr. Harrison. Start putting together the rest of the components for the build.
By the way, what you want to achieve? One audio amplifier with low THD or... ?
First, you should improve VAS amplifier diagram. Then, the output triple tends to be more prone to local parasitic oscillations than the darlington. You can eliminate this disadvantage, but not entirely, by mounting in the bases and collectors of the transistors Q1 and Q11 of 10 ... 15 ohm resistors. Then, the input is not properly optimized because the resistors R17, R29, R3 and R4 voltage falls too much. Typical aims to sweep more than 25mV. In this case, an optimal value for these resistors should be 20 ... 24 Ohm. Then, the most efficient way to eliminate noise input circuit may be done but after a few tests on prototype. In this respect, constructive way PCB has an important role.
First, you should improve VAS amplifier diagram. Then, the output triple tends to be more prone to local parasitic oscillations than the darlington. You can eliminate this disadvantage, but not entirely, by mounting in the bases and collectors of the transistors Q1 and Q11 of 10 ... 15 ohm resistors. Then, the input is not properly optimized because the resistors R17, R29, R3 and R4 voltage falls too much. Typical aims to sweep more than 25mV. In this case, an optimal value for these resistors should be 20 ... 24 Ohm. Then, the most efficient way to eliminate noise input circuit may be done but after a few tests on prototype. In this respect, constructive way PCB has an important role.
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