DIY amp and such build gallery

[fierce_freak]

I loved the TKD CP2511 I had previously...definitely tops for a pot. It does have a slightly different curve for attenuation than your standard alps, though.

[Pars]

Originally Posted by luvdunhill

ya, that's the log versus audio scales I suppose.

As far as I know, they are both log scales, just one slightly modified?

[luvdunhill]

Originally Posted by Pars

As far as I know, they are both log scales, just one slightly modified?

oops, i was wrong... I was thinking linear = linear log scale I'll do some research, I think they just have different angles of operation. I'm assuming you have the balanced versions guys?

[Pars]

Originally Posted by luvdunhill

oops, i was wrong... I was thinking linear = linear log scale I'll do some research, I think they just have different angles of operation. I'm assuming you have the balanced versions guys?

According to TKD's web site they don't make a balanced version. Rotary Faders [TKD]. Note that they have a CP2500 and a CP2511 standard... the 00 is 30 degrees rotation versus 310 degrees I believe for the CP2511, which is what Percy and partsconnexion sell.

However, Potentiometer, Kohle, Leitplastik shows up to a 6 gang version. They aren't exactly cheap, particularly in present exchange rate terms. Which is why I'll either use a Dantimax or Twisted Pear relay control for the Aleph P1.7 when I get around to it.

[luvdunhill]

I'm an idiot on the TKD pots.... they are "balance pots"

edit:

Since everyone reads every thread around here.... here's a link to my Linear group buy:

http://www.diyaudio.com/forums/showt...hreadid=126039

[deepak]

Originally Posted by luvdunhill

I'm an idiot on the TKD pots.... they are "balance pots"

edit:

Since everyone reads every thread around here.... here's a link to my Linear group buy:

diyAudio Forums - Group Buy: Linear Systems LSK389 / LSK170 JFETs (i.e. Toshiba 2sk389/2sk170 subs)

Great googly moogly, nice one Marc!

[luvdunhill]

Originally Posted by deepak

Great googly moogly, nice one Marc!

I'll be swimming in JFETs, tethered to a anti-static wrist strap..

[luvdunhill]

a bit of progress on my DC motor project

[swt61]

Originally Posted by luvdunhill

a bit of progress on my DC motor project

Wow! The motor pod turned out awesome Marc!

[Augsburger]

Well here goes. I became tired of my T-Amp based office rig and decided to try something different. I used the TA2020 based chip Charlize II because of the good price to performance to ease of build factors. Rather than use a Hammond case I designed something that better matched my office aesthetics and used a acrylic plastic vendor I have used in the past for some speaker projects.

[swt61]

Very nice!

[Augsburger]

Coming from you Steve, that is a real complement. Thanks.

[luvdunhill]

crikey these are cheap:

24 Steps Attenuator 10K - DALE/Ladder Type/BALANCED - eBay (item 280247529282 end time Aug-17-08 06:18:54 PDT)

should I try one out?

[fierce_freak]

Ooh, I would. That's pretty awesome for the price.

Also, their Preamp IR Volume control looks pretty interesting...hrmmm

[luvdunhill]

yup. I agree. I think I'll bite the bullet and try one.

Also, found this on the 'net today... dunno how accurate it is, perhaps Kevin can comment:

http://www.diyresearch.net/data/jc3/...ER_AMP_SCH.pdf

[luvdunhill]

Originally Posted by fierce_freak

Ooh, I would. That's pretty awesome for the price.

Also, their Preamp IR Volume control looks pretty interesting...hrmmm

price went up to $100, and they're out of stock now for the 10K ....

[fierce_freak]

ouch...still not a bad price, imo

I want to try their preamp ir volume control, but I'm not thrilled about using an alps blue. It looks like one of the motorized ones, so it probably can't be changed out.

[luvdunhill]

Originally Posted by fierce_freak

ouch...still not a bad price, imo

I want to try their preamp ir volume control, but I'm not thrilled about using an alps blue. It looks like one of the motorized ones, so it probably can't be changed out.

well, we'll see how it goes... simplifies my preamp (no extra psus), so I'm happy about that. I also stocked up on those big Rifa caps they sell for coupling caps.

[luvdunhill]

this is for Steve (since I cannot attach images to PMs) :

[swt61]

Originally Posted by luvdunhill

this is for Steve (since I cannot attach images to PMs) :

Sweet! That second one is kind of the reverse of what we've been talking about. We can do something very similar. I like the soft edges in the first pic.