March 23rd 15, 03:59 PM
Hello David. I noticed this is more than 15 years old, but do you have any schematics for the fairchild 663? I got hold of two, and looking to build them into a rack.
Any help greatly appreciated.
Audun
On Friday, January 29, 1999 at 9:00:00 AM UTC+1, David Torrey wrote:
> Cleaning out excess equipment.... Hopefully this will answer most
> questions....
>
> -One pair Fairchild 663 passive optical compressor modules from Integra
> series console, early 1960's
> Price $700/pair. 600 ohm impedance, Jones barrier strip connections.
> Will operate on 6.3VAC or 9VDC. Insertion loss 3dB.
> Dimensions: 1.5"Wx7"Hx4.5"D, 8 transistors. Includes instructions and
> schematic.
> 3 controls include: Threshold, Release (300ms. to 7sec.), Meter adjust
> trimmer
> Meter shows amount of compression. Signal path is passive. Ratio fixed
> at 2:1. Maximum compression is 20 dB. Can be reconfigured as expander or
> ducker.
> Comment: *One unit is working, one needs repair, both have all parts.*
> (The repair is probably a coupling cap for the control circuit/meter
> driver, which is very basic.) Attack time can be decreased by replacing
> the light bulb with an LED, if you prefer Manley-type sound. These units
> were designed for program compression. They will fatten sounds, not peak
> limit them. They operate more like an LA-2A than a 176 or the later
> 1176. Two units can be daisy-chained to create a 4:1 ratio, or one
> detector can be wired to control both channels. The control circuit is
> normally jumpered to the output terminal, allowing for compression. This
> connection can be changed to insert sidechain EQ or to otherwise
> reconfigure the gain control.Control is from discrete CDS photocell and
> lighbulb source, not a Vactec-style element. You could retrofit a Vactec
> device...
>
> ALSO:
> -One pair 664A passive program equalizers from Integra series console.
> Price $600/pair. 600 ohm impedance, Jones barrier strip connections.
> Insertion loss 17dB.
> Dimensions 1.5"Wx5.25"Wx5.5"D No active components. Includes original
> technical bulletin w/ complete curves.
> 3 controls include :
> -High boost/cut frequency selector. Detented at 4, 6,8,10 and 15 kHz.
> Boost curve is haystack shaped, cut is 6 dB/oct..
> -High frequency boost/cut amplitude: has +/-10dB range, in 2dB detented
> steps.
> -Low Frequency boost/cut amplitude at 80 Hz: has +/- 10dB range, in 2dB
> steps. Boost/cut curves are complementary.
> Comment: Smooth EQ action - designed for broadband shaping and peaking
> at high frequencies. The unit can be jumpered inside to change the
> high-frequency points to 2, 3, 4, 5 and 7.5 kHz if desired.
>
> Silver switch contacts in both units. Original knobs. Would prefer to
> sell the entire set of four for $1200.
>
> David Torrey 603-924-2277 http://www.drtmastering.com
Any help greatly appreciated.
Audun
On Friday, January 29, 1999 at 9:00:00 AM UTC+1, David Torrey wrote:
> Cleaning out excess equipment.... Hopefully this will answer most
> questions....
>
> -One pair Fairchild 663 passive optical compressor modules from Integra
> series console, early 1960's
> Price $700/pair. 600 ohm impedance, Jones barrier strip connections.
> Will operate on 6.3VAC or 9VDC. Insertion loss 3dB.
> Dimensions: 1.5"Wx7"Hx4.5"D, 8 transistors. Includes instructions and
> schematic.
> 3 controls include: Threshold, Release (300ms. to 7sec.), Meter adjust
> trimmer
> Meter shows amount of compression. Signal path is passive. Ratio fixed
> at 2:1. Maximum compression is 20 dB. Can be reconfigured as expander or
> ducker.
> Comment: *One unit is working, one needs repair, both have all parts.*
> (The repair is probably a coupling cap for the control circuit/meter
> driver, which is very basic.) Attack time can be decreased by replacing
> the light bulb with an LED, if you prefer Manley-type sound. These units
> were designed for program compression. They will fatten sounds, not peak
> limit them. They operate more like an LA-2A than a 176 or the later
> 1176. Two units can be daisy-chained to create a 4:1 ratio, or one
> detector can be wired to control both channels. The control circuit is
> normally jumpered to the output terminal, allowing for compression. This
> connection can be changed to insert sidechain EQ or to otherwise
> reconfigure the gain control.Control is from discrete CDS photocell and
> lighbulb source, not a Vactec-style element. You could retrofit a Vactec
> device...
>
> ALSO:
> -One pair 664A passive program equalizers from Integra series console.
> Price $600/pair. 600 ohm impedance, Jones barrier strip connections.
> Insertion loss 17dB.
> Dimensions 1.5"Wx5.25"Wx5.5"D No active components. Includes original
> technical bulletin w/ complete curves.
> 3 controls include :
> -High boost/cut frequency selector. Detented at 4, 6,8,10 and 15 kHz.
> Boost curve is haystack shaped, cut is 6 dB/oct..
> -High frequency boost/cut amplitude: has +/-10dB range, in 2dB detented
> steps.
> -Low Frequency boost/cut amplitude at 80 Hz: has +/- 10dB range, in 2dB
> steps. Boost/cut curves are complementary.
> Comment: Smooth EQ action - designed for broadband shaping and peaking
> at high frequencies. The unit can be jumpered inside to change the
> high-frequency points to 2, 3, 4, 5 and 7.5 kHz if desired.
>
> Silver switch contacts in both units. Original knobs. Would prefer to
> sell the entire set of four for $1200.
>
> David Torrey 603-924-2277 http://www.drtmastering.com