For folks that want to use an active (versus passive) design, I found this yesterday: http://home.wanadoo.nl/electro1/avr/mas9116.htm Yet another volume control chip. Tomo makes valid points. Others may feel differently mlloyd1

The DS1808 feeding a discrete JFET buffer (or the KG preamp) may be a good solution. It is just an attenuator and control logic - no internal op amps like the CS3310, PGA2310, etc. devices. However, I've been unable to get samples of this part out of Maxim. I wonder if it actually exists yet...

The approach Tangent mentions actually works fairly well I used it for a PCB Express board I did a while back. Not too painful depending on your board complexity. mlloyd1 Quote: Originally posted by tangent .... You can mimic the effect by hand with ExpressPCB, but it's a lot of work.

BDent's prices for the 2SK109 seem VERY high to me. I'd wait for stock elsewhere. Howzabout CEI or Dalbani? mlloyd1 Quote: Originally posted by Doh BDent appears to be out of stock as well....Any other sources out there? -Doh

I agree with PPL about the BUF634 buffer input current. I've had good success sticking a pair of JFETs in front, configured as JFET source follower w/JFET current sink. Toshiba 2SK170 is a low noise, relatively cheap single (2SK389 is dual, much more expensive, save it for your RIAA preamp I...

Howzabout the AD8610 . It appears to be designed to be an OPA627 killer. Even has head to head comparisons in the data sheet! Surface mount only, though. Might be an issue for some folks. Michael

Yes, the NE5534 is NOT unity gain stable. You will have to compensate it when used in applications where the gain is too low.

The OPA2107 and OPA627 are DiFET, but I think performance-wise, they are not that closely related. The OPA627 is much faster and quicker, has much more open loop gain, better DC precision, lower noise and a beefier output stage. It's also a single opamp part. I'm sure the OPA2107 has a...

There is some discussion on this part in the DIY audio forum: http://www.diyaudio.com/forums/showt...p?threadid=958

Just curious : Anybody tried National's LM6321 or any of the video CFAs (e.g. AD811) or any of the XDL drivers (e.g. AD815) as buffers?

Quote: Originally posted by ppl I have toyed with the idea of using a Digital Pot with the 1802 chip as sugested by Apaheared. I have been resistent to using this technology because of the added Noise and Distortion. I like the Idea of Close Channel tracking, This is most importent with...

Hi: I've seen a number of posts mentioning a preference for the AD823 over the AD744. I am curious to know if any of you have tried using the AD744 by bypassing its output stage and directly driving a buffer, say an AD811 video speed CFA. I use this as a line stage as well as a headphone amp...