Harrison Ford Filter Feeler

[elskardio]

What about an axis converter like this: http://www.banzaimusic.com/Axis-Converter-6-3mm-4mm.html

 

[dandeurloo]

Dan: That will mean the pots are going to have to move slightly on the faceplate. Let me know what info you need and I'll track it down.

This is a problem as I have already started the front panels.  Hit me up via email and we can figure it out.

 

[Marcocet]

What about an axis converter like this: http://www.banzaimusic.com/Axis-Converter-6-3mm-4mm.html

That's awesome.

I also found some Sifam knobs that should work. Putting it together now...

Anybody using these things yet?

 

[TapeOpAl]

What about an axis converter like this: http://www.banzaimusic.com/Axis-Converter-6-3mm-4mm.html

That's awesome.

I also found some Sifam knobs that should work. Putting it together now...

Anybody using these things yet?

I'm raring to go! What are the other Europeans using for power supply? I can solder some components and wires together and throw them in a case but it's working out what the ingredients are!

 

[Marcocet]

Any +/- 15V supply that will put out 20mA per channel. So they really don't need much juice. I'm partial to the psu from amb.org but it's slight overkill for this project I think. I may have one built up already so maybe I'll go with that. Or maybe I'll just use this wall wart that was on my workbench until I got a real desk power supply...

Someone suggested the Peter C Green PCU, but I haven't seen boards around for it. It would be nice to find something that fits easily in 1RU.

 

[Meathands]

It would be nice to find something that fits easily in 1RU.

Alarm bells! I went on the same quest last year and wish I hadn't been so successful. It's cost me double to go back and make the PSU external because the noise on the channels near the transformer was so bad. I know that many here and commercial manufacturers fit PSUs in the same case as the audio all the time, but proceed with caution.

 

[G-Sun]

DRV134PA , is that:

IC Op amp,
as http://no.farnell.com/texas-instruments/drv134pag4/ic-op-amp-differential-audio-134/dp/1206893 ?

And, TL074P
I didn't find it at Farnell/ Mouser/ Digikey. Where can I get it?

 

[Marcocet]

DRV134PA , is that:

IC Op amp,
as http://no.farnell.com/texas-instruments/drv134pag4/ic-op-amp-differential-audio-134/dp/1206893 ?

And, TL074P
I didn't find it at Farnell/ Mouser/ Digikey. Where can I get it?

Looks fine. Any TL074 with the right pinout should work.

 

[G-Sun]

Looks fine. Any TL074 with the right pinout should work.

Thanks!
Found a couple of suppliers for TL074

 

[G-Sun]

What's the lead-spacing for the caps?

https://docs.google.com/spreadsheet/ccc?key=0AmEgFUTJT9ZtdENwNHQ4QmlEU2YybTJ6dmhqNi1TYXc

Are the pots and switch for pcb-mount?

(Still looking for 2-4 boards)

 

[Marcocet]

What's the lead-spacing for the caps?

https://docs.google.com/spreadsheet/ccc?key=0AmEgFUTJT9ZtdENwNHQ4QmlEU2YybTJ6dmhqNi1TYXc

Are the pots and switch for pcb-mount?

(Still looking for 2-4 boards)

Yes, the pots and switch are PCB mount. Colin is putting together a kit over at AML. However everything's pretty damn tightly spaced, so if you wanted more room you could mount them off board pretty easily.

Cap spacing is 5mm. I use WIMAs.

 

[G-Sun]

Yes, the pots and switch are PCB mount. Colin is putting together a kit over at AML. However everything's pretty damn tightly spaced, so if you wanted more room you could mount them off board pretty easily.

Cap spacing is 5mm. I use WIMAs.

Thanks! Nice
Will Colin sell boards as well?

The Harrison Ford Filter must be an excellent add-on to many DIY-projects, especially preamps and eqs..

 

[dandeurloo]

I'm gonna have the boards soon.  I'm working on ordering them now!

 

[G-Sun]

I'm gonna have the boards soon.  I'm working on ordering them now!

Good news  ;D

 

[Slenderchap]

A few people have asked about kits so we will probably do them (at least for a short time anyway) .... would contain everything except the PCB.... like this;

www.audiomaintenance.com/downloads/harrison_filter_pcb_1.jpg
www.audiomaintenance.com/downloads/harrison_filter_pcb_2.jpg

I just need to get some costings.

Colin
www.audiomaintenance.com

 

[G-Sun]

Looking very good Colin!

BTW: What's that 22-23-2041 4way molex for?

 

[Marcocet]

Looking very good Colin!

BTW: What's that 22-23-2041 4way molex for?

It's a way to bypass the in and output ICs if you're using it inside another circuit rather than standalone.

 

[G-Sun]

It's a way to bypass the in and output ICs if you're using it inside another circuit rather than standalone.

Thanks! I was hoping that was the case.

Would it be straight forward to
- go directly from a ssl9k to the the Harrison Ford Filter, skipping the ssl9k balancing board?
and
- Insert it at the link-insert point for the Clarec Eq1549?

 

[G-Sun]

What are the specs for the front panel layout, 1 channel?
(Spacing)

 

[Marcocet]

What are the specs for the front panel layout, 1 channel?
(Spacing)

Depends on the exact pots and switch you use. You'd be better off measuring it yourself than trusting mine...