New project : R-2R Attenuator With Remote Control V2

[adamus]

that is very very wierd.

Mine certainly does no do that! bizarre

 

[rob lenk]

r-2r

finally- a listening session last night
sounds good!
I agree with N.P.- full range, revealing, maybe a tad of 2nd harmonic but certainly not overly rich,warm, or fuzzy vis a vis rolled off highs, very nice balance and plenty of gain out of my scdce333es into a modified dynaco st 70- fact volume around 47 to 50 is more than enough-
I sit about four feet from my speakers that are about six feet apart- near field ya baby - may have to up the output resistance- tear it down again solder in some new resistors , not much fun?!
Am having some problem with the 3pin connector staying in good contact with the ir reciever,sometimes the remote works sometimes not.
Lu can we carefull solder this instead of the slide on connector and could I get another one incase I burn it triing to solder it?Cost?
inquiring minds want to know!
rob

 

[adamus]

got mine going to.

definately a step up on the alps pot it has replaced, the bass is definately stronger.

it doesnt play ball with my vlave amp (impedance matching) so i buffered it. Used the pedfa rogic buffer (cheers blair!) and the valve amp was instantly happy. again, imporvement over the alps is noticable.

Thanks lu, good product - just waiting on my front panel from Shaeffer.

 

[bbp]

Re: r-2r

finally- a listening session last night
sounds good!
I agree with N.P.- full range, revealing, maybe a tad of 2nd harmonic but certainly not overly rich,warm, or fuzzy vis a vis rolled off highs, very nice balance and plenty of gain out of my scdce333es into a modified dynaco st 70- fact volume around 47 to 50 is more than enough-
I sit about four feet from my speakers that are about six feet apart- near field ya baby - may have to up the output resistance- tear it down again solder in some new resistors , not much fun?!
Am having some problem with the 3pin connector staying in good contact with the ir reciever,sometimes the remote works sometimes not.
Lu can we carefull solder this instead of the slide on connector and could I get another one incase I burn it triing to solder it?Cost?
inquiring minds want to know!
rob

got mine going to.

definately a step up on the alps pot it has replaced, the bass is definately stronger.

it doesnt play ball with my vlave amp (impedance matching) so i buffered it. Used the pedfa rogic buffer (cheers blair!) and the valve amp was instantly happy. again, imporvement over the alps is noticable.

Thanks lu, good product - just waiting on my front panel from Shaeffer.

Thank you

 

[glt]

I think I found the connectors

http://www.nkcelectronics.com/connectors.html

 

[joshuajoshua]

paypal account

Hi Lu,

Can you give me your paypal account?

Thanks,

Joshua

 

[bbp]

Re: I think I found the connectors

http://www.nkcelectronics.com/connectors.html

the JST 2.54mm 3-pin through hole connector pack
is the same as the original connector on the main board

And rob found a IR reciver on digikey, thanks for your effort ^_^

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=425-2014-ND

 

[joshuajoshua]

board dimension

Lu,

payment sent!..

By the way can you tell me the dimension of those 2 boards?

Thanks,

Joshua

 

[joshuajoshua]

Lu....can you confirm if you have received my email with payment?

Joshua

 

[bbp]

Re: board dimension

Lu,

payment sent!..

By the way can you tell me the dimension of those 2 boards?

Thanks,

Joshua

Lu....can you confirm if you have received my email with payment?

Joshua

Hi my friend,

sorry to reply you late.
Your parcel is on the way to you ^_^


regards
Lu

 

[bbp]

the second pic

 

[bbp]

3rd

 

[bbp]

4th

 

[joshuajoshua]

Hi Lu,

Thanks for the info about the kit and detail pictures....

Joshua

 

[adamus]

Lu, finished the build. Its a good product.

I used a buffer after the vol control to lower the output resistance.

An externally hosted image should be here but it was not working when we last tested it.

 

[SimontY]

Veeery nice looking build, and I bet good-sounding too.

Simon

 

[adamus]

cheers, sounds great and works as expected. I used pedja rogic buffers (2sk170). Sounds supremely transparant. No popping or anything when changing vol.

 

[joshuajoshua]

cheers, sounds great and works as expected. I used pedja rogic buffers (2sk170). Sounds supremely transparant. No popping or anything when changing vol.

Very professional looking....

BTW, I plan to use pedja buffer as well, could you post the schematic that you use? Like do you put 1M resistor from 2sk170 gate to the ground? series R at the input?

Joshua

 

[SimontY]

I use that buffer too, it's amazingly good. Good to know it works with this attenuator nicely!

 

[adamus]

yes, the 1m resistor is to ground, no series resistance, output goes through 4.7uf caps as the pedja buffer does present large dcoffset.