Harrison Ford Filter Feeler

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Marcocet said:
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.
 
elskardio said:
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?
 
Marcocet said:
elskardio said:
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!
 
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.

 
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.
 
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?
 
G-Sun said:
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.
 
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)
 
G-Sun said:
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.

 
Marcocet said:
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..
 
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
 
Marcocet said:
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?
 

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