1o73 Line-in boards - mission accomplished

[kambo]

link is already posted...

Glide On Fade Awesome Switch
http://www.glideonfade.com/electronics.htm

 

[envelope]

Hello, looking at Martins' picture in the first post, can anybody tell me where to connect the 4 wires from the fader. I can see the Yellow and Red terminations, but not the Black or Green.


EDIT. thank you Martin, it is working wonderfully.

 

[madriaanse]

Assuming a Penny and Giles 3220 fader: blue, black, green are tied together at ground, yellow to L, red to P, omit 10K and jumper.

This is the fader I used: http://www.audiomaintenance.com/acatalog/PG-02-D25578_extended_info.html

Hope this helps,

M.

 

[skal1]

Any of these boards left

 

[madriaanse]

yup  ;D shoot me an email at martin_adriaanse (at) yahoo (dot) com. Great for anything where flavorful line makeup gain is needed.

M.

 

[Siegfried Meier]

Does anyone have a lead on any more St. Ives L31267 line input transformers?  I just found 8 at a really good price, but I need roughly 10 more to build the monster that I'm attempting right now.

Thanks!!
Sig

 

[Johndcx]

Is there a Pcb for sale on the line input?

 

[SIXTYNINER]

bump

 

[sine_wave]

Does anyone know if it's possible to add a VU meter to this circuit?

Thanks,
John

 

[djn111]

Hi,

Yes sure, with a buffer, and maybe a switch so you can monitor the in/output.

Check this link http://www.jlmaudio.com/VU%20Buffer.htm

DJN

 

[Siegfried Meier]

Does anyone have a wiring diagram for using the St. Ives line input transformer?  Martin sent me a document but for the life of me I can't sort it out.  Anyone make something simple like what used to be in his original 1290 build documents?

Thanks so much!!
Sig

 

[Siegfried Meier]

Anyone?  Hoping to get this last little bit wired up and off the bench today.

I haven't really seen anyone show pics of their finished units.  Have any of these actually been completed?

Thanks guys!
Sig

Edit - Got a great little drawing from Martin, I can upload if anyone needs it.

 

[maxwall]

Martin,

This line amp would work nicely in a summing box. Is there a summing
box design available that two of your line amps can be integrated into ?

If anyone cares to post some links to summing box projects that these line amps would
be good on for output L-R , this would be helpful.

 

[sr1200]

What kind of power supply would i be looking at for an 8 channel build?

 

[migidee]

Forgive my ignorant question,(still very new to diy)  but I have done a lot of reading on the subject and I am still confused.  Is this a way of adding a line input to an EZ1290 mic pre or an altogether different line amp?

 

[kambo]

this is line in only... EZ1290 mic pre

 

[migidee]

I see.  Perhaps I have looked over it, but is there a way to add a line in to the EZ1290?

 

[migidee]

nevermind, I just found this post

http://www.groupdiy.com/index.php?topic=27861.20

 

[Slenderchap]

Maybe Santa Claus will bring the forum what you need on Christmas Day morning.... plus a bit more ?

Colin
www.audiomaintenance.com

 

[0dbfs]

looking into building a 16 channel box with these using EA's 10468's (in reverse for line in) and 1166's (on the outputs). Looks like the ez1290 has spec'd 500mA/channel as an overbuilt PSU. Any ideas what these LN72's draw per channel?

Some thoughts on the input gain control:
- Remoted to a front panel with wire's? Will this likely cause problems/oscillation?
- Use of a POT instead of greyhill for input gain control?

Some thoughts on mounting in an RU box:
- cards side by side. 8x channels wide, 2x channels high in the chassis.
- 100mm faders on the front panel. 16x wide. That provided about 1" for each fader which looks to still have a little room. Tight but I believe I can probably fit 16 channels into a standard RU box.
- Mute button. Have to check out the board to see where this can go. ie; cuts input signal or post fader signal.
- Polarity switch. Should this switch secondary or primary of IP trafo / OP trafo?
- Output trim in addition to fader.
- I'm seeing 6RU may be possible for 16 channel-strips.
- Channelstrip controls = POLARITY, I/P-GAIN, MUTE/CUT, AUX-OUT-ATTEN, FADER

Other thoughts:
- Additional untrimmed output.
- Balanced trafo out
- Unbalanced out. (looks like this may be -2.5db)
- One output trimmed, another just post fader. Maybe a pre/post switch for the trimmed output so it can be used like a send and multed/bussed as needed from the patchbay.
- main trafo balanced out to feed a 16x2 LCR passive summing mixer with 20k destination impedance. Maybe two of these with destinations in parallel for a four-main-bus system @ 10k dest-impedance. Makeup gain provided by patchable preamp.
- Maybe and I/P-A/B select would be nice for A/B'ing between "processed" and "bypass" without using an insert. ie; DAW -> EQ/DYN->I/P-A,||'d, DAW->I/P-B.

Thoughts / Comments?

Best,
jonathan