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

[joshuajoshua]

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

thanks for the feedback Adamus!

Joshua

 

[SimontY]

What about that 1uF cap? Have you experimented with that?

Simon

Sorry for sort of OT!

 

[adamus]

no, i havent played around as yet, i just used a 1uf sonicap bypassed with a small mkp.

 

[longitude]

Lu,
Just bought your kit,
Before the kit arrival,
I would like to prepare the power supply,
Can you tell us how much is the total current demand of the whole kit?

Thank you!

 

[glt]

Lu,
Just bought your kit,
Before the kit arrival,
I would like to prepare the power supply,
Can you tell us how much is the total current demand of the whole kit?

Thank you!

.5 amp http://www.diyaudio.com/forums/showthread.php?postid=1724702#post1724702

 

[longitude]

.5 amp http://www.diyaudio.com/forums/showthread.php?postid=1724702#post1724702

Thank you!
So a single LM317 can do the job~
Good news~

 

[adamus]

I used a single 7805, it doesnt even get warm

 

[bbp]

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.

Wooooooooooow What a wonderful job !!!

 

[MattMax]

Email sent with order request.

 

[bbp]

Hi guys,

Thank you all
Thank you for choosing my KITs
The kit is available for a long term, and the total cost are 70 USD /100 USD for single-end/balanced version, worldwide shipping included.
For I am not a full time DIYer here, your orders will be send in each weekend.
My email / MSN : bbp6604560 at hotmail .com


regards
Lu

 

[bbp]

Notice:


Hi TC,

Your parcel is on the way to HK, I sent it with sf-express,which website is www.sf-express.com
I also sent the tracking number to your email,but the KIT will arrive in Hongkong tomorrow, for the telephone problem, you'd better contact the local SF-EXPRESS if you can't get the parcel in time.


regards
Lu

 

[coloradosound]

Could you make available balanced multichannel (6 or maybe
even 8 channels) and with source selection for more inputs
(perhaps 10 input sources)?

 

[bbp]

Could you make available balanced multichannel (6 or maybe
even 8 channels) and with source selection for more inputs
(perhaps 10 input sources)?

Hi coloradosound,

Multichannel is OK, up to 8 CH is not a problem, but 10 input ...

 

[joshuajoshua]

Re: Re: board dimension

Hi my friend,

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


regards
Lu

Hi Lu,

I just received the package today, thanks.

BTW, I haven't applied the power yet still busy building the case but by looking under magnifying glass I can see you've done a good soldering joint there...

Joshua

 

[bbp]

Re: Re: Re: board dimension

Hi Lu,

I just received the package today, thanks.

BTW, I haven't applied the power yet still busy building the case but by looking under magnifying glass I can see you've done a good soldering joint there...

Joshua

Have a nice time in DIY

 

[bbp]

To TC in HK

Hi TC,

I got inform from the express company, they can not contact you and return the parcel to me.
Please contact me if you see this post


regards
Lu

 

[luzhu]

up

 

[veiloctane]

more details please

hi i have sent email requesting more information.

i am new to diy audio and currently looking for a remote control volume control with source selection for my 41hz. amp6-basic.



thanks,
Billy

 

[bbp]

Re: more details please

hi i have sent email requesting more information.

i am new to diy audio and currently looking for a remote control volume control with source selection for my 41hz. amp6-basic.



thanks,
Billy

Hi billy, email sent

 

[adamus]

bbp, Been using the R2r a lot, its a great piece of kit. My only gripe is the range with a relatively hot source.

are the 'steps' log or linear? component wise, is there anything i can do to give more control at the lowest volumes (-65 to 60 are big jumps).

For info, the attenuator is buffered (unity gain).