LYNX Power Amp PCB Group Buy interest

[olev]

I'll take 2.

 

[spind]

Added 4 more.
Steve.

 

[gary s]

Total PCB count is now up to 181 boards. This is a very good effort here by everyone.

Lets see if we can get 19 more boards to make it to 200.

Jan should be very pleased with this group buy for his very sound design.

For all concerned , check out his PSU design to go with it.

Regards

Gary..

 

[wendell]

I added 3 more boards! will this amp be overkill for H/T use? 😀

 

[wendell]

C'mon almost there 16 more boards to 200

 

[Jan Dupont]

I know there are a few minor "errors" in the diyAudio Edition layout, but it was late and I just wanted to check the interest 😉

I will finish it later today 🙂

 

[steenoe]

Added 6 more, total is now 187.

🙂

 

[builderandy]

PSU voltage rails

Hi Jan, I'm almost sure that I read in an old assembly guide for the Lynx amplifier that it could take voltages up to ±70 VDC. Why is it changed to max ±60 VDC?

The reason for asking is that I have two transformers of 2x50VAC waiting for this project to start.

/Andy

 

[Kranis]

Signed up for 3 boards. 193 and counting...

/Kranis

 

[Jan Dupont]

builderandy

You have a good memory 😀
And it can still do +/-70VDC but remember to lift the Power resistors 5mm from the PCB.....

Furthermore I had the opinion that this was not interesting driving it at such high Voltage exept if you have vey high impedaced speakers.
At 70V the SOA limit is 3A for the output devices, which gives a total of 12A for all four output devices...

But as said, you can use +/-70V 😉

 

[rikkitikkitavi]

wouldnt it be smarter to run the output transistors on say 60V, and the rest on 70V ? As there seems to be taken in account when studying schematic and PCB.

Separate supplies though. Or one smaller riding on the bigger.

 

[olev]

From wiki page: Total PCB Orders: 201 pcs

COOL!

 

[housing]

Hurray!!!!

 

[Jan Dupont]

Official time left for this group buy is 4½ hour....... 😉

I hope you all will enjoy the LYNX Amp 🙂

 

[Jim Hamley]

Jan,
Just took a quick look at your schematic. Don't you want the input signal to be applied to pin 3 (the non-inverting input) of the OPA627, with the negative feedback voltage divider tap of R120/R121 applied to pin 2-the inverting input?
...Jim

 

[Jan Dupont]

Jan,
Just took a quick look at your schematic. Don't you want the input signal to be applied to pin 3 (the non-inverting input) of the OPA627, with the negative feedback voltage divider tap of R120/R121 applied to pin 2-the inverting input?
...Jim

No 😉
If I wanted that I had done that 😉
Though the output would have been inverted......

 

[Jan Dupont]

Please email me your contact information

Following has placed orders in the Wiki, but I have no contact informations (though I have received a few names and adresses but no diyAudio name to match it to.

Ipolyakov
Giannettino
ex007
finneybear
widerström
wjh
AMV8
miken500
Wendell
Cocolino
Xaudiox
Guiness

Please email me your contact information INCLUDING your diyAudio aka's

Thanks in advance
😉

 

[Jan Dupont]

Thanks Guiness 😉

 

[gary s]

Congratulations Jan, on reaching 200 boards in this group buy. Just watch out Paypal does not get on to you with a sudden huge influx of money into your Paypal account as they might think you are laundering money. Look at the post in the UGS PCB group buy from Vincent in France.

You might want to be prepared and have all your documentation saved for request for payment to all the buyers so you can show Paypal this is legitimate on your behalf.

Just letting you know in advance.

Best Regards

Gary..

 

[Jan Dupont]

Thanks gary,

Just have to wait and see what happens........