1176 Internals

[rhodesp04]

bump

[puppee]

It looks a little messy. The twisted wires do not look that twisted at all. Cabling isn't that neat.

[rhodesp04]

i thought that too. what about the board and actual components? anyway to tell if they're any good?

[Kronos147]

I saw that add on evil-bay.

The thing that makes me say 'hmmmmm' is why the power supply is seemingly integrated on the same card as the audio. I would think that would be a prescription for hum.

[Mr.HOLMES]

Any Questions?





This are just 3 pics I found thorough google there are many more and the layout is nearly the same regardless which revision....

[dbbubba]

Originally Posted by Kronos147

I saw that add on evil-bay.

The thing that makes me say 'hmmmmm' is why the power supply is seemingly integrated on the same card as the audio. I would think that would be a prescription for hum.

I can't tell for sure, but I don't think that the power supply IS one that board.

However.... on a real 1176s the power supply is on the circuit board pictured.
Look at the pics.
See the big filter caps on the back part of the board?
Those are part of the power supply.

Having a power supply on a board doesn't mean there will be any more hum as long as you take care of the routing of the power rails.
Ground planes and traces need to be well thought out.

[Led]

Hi, the power supply tranny isn't on any of the boards, it is mounted on the side of the chassis (back right corner). As Danny correctly stated, the power supply filter caps are on the PCB which is standard. The transformer in the middle of the PCB (on 1176) is the output transformer.

[zimv20]

Originally Posted by Mr.HOLMES

i can say for certain that this is an image of an early re-issue 1176, serial #766.

because i took that photo! :-)

[rhodesp04]

can anyone tell me/pm me the contact info for someone who does a real good 1176 clone?

[dbbubba]

I was going to say because only the middle unit is an original issue unit.

Note the purple-ish/black "black" anodized front panel.
I THINK.... that is a later version black face.
Either the first black units were kinda' purple or it was the later ones.
I forget that detail now.

[Led]

I think you're right. That middle one looks almost identical to my rev F.

[mexicola]

Originally Posted by Kronos147

I saw that add on evil-bay.

The thing that makes me say 'hmmmmm' is why the power supply is seemingly integrated on the same card as the audio. I would think that would be a prescription for hum.

Sorry to interject, but this is such a myth...it really irritates me. I do a good bit of tech work and also build the occasional piece of gear for other studios and engineers. I can't tell you how many times I've heard people say this...it's nonsense.
Now, if the transformer were mounted on the pcb, then maybe. But if there's ample distance between the trafo and pcb, and you use proper decoupling, onboard power supplies are usually whisper quiet. In fact most big name gear has the psu incorporated into the main pcb.

[imloggedin]

You want a good clone? Get a purple audio MC77, or just buy the real thing. You want a cheap clone? They will probably all look the same. Its probably a Gyraf 1176 board, and the power supply is build on the same board as the audio circuit (no biggie). The wiring looks fine, the wires dont have to be twisted they can be straight and it will work fine, ive seen inside many preamps where wires arent twisted and in a preamp it would be even more critical if it was true.

[imloggedin]

....Also, if you know how to solder and can drill holes you can build one for about $400.

[dbbubba]

Some of the really specific parts are bit hard to source to build an exact clone.

The "clones' do work arounds.

[rhodesp04]

yeah i don't care how it's made or how it looks i only care how it sounds haha but definitely not a DIY kinda guy. just a (not-so) humble musician looking for an 1176

[andychamp]

Originally Posted by rhodesp04

can anyone tell me/pm me the contact info for someone who does a real good 1176 clone?

HEREthumbsup

[Em Kay]

Originally Posted by imloggedin

....Also, if you know how to solder and can drill holes you can build one for about $400.

This sounds interesting, could you elaborate, please?

[imloggedin]

Originally Posted by Em Kay

This sounds interesting, could you elaborate, please?

Dig around on prodigy pro and you'll find parts lists and the gyraf 1176 boards for this project.

[mexicola]

Originally Posted by rhodesp04

i've recently seen an ad for a guy who makes 1176 clones and he ventured far enough to show the internals of his unit. i have no idea what the inside of an 1176 looks like so I wanted to put this out and ask if someone could verify if this looks like a good build/unit before i purchase it.

If this is the guy building the 1176 clones with the purple wood grain faceplates, I believe he's making his own pcb's. That's definately not a G1176 board or an MNAT's board. He had a thread somewhere about the clones he builds.

[joe-electro]

Just had to set the record straight. The third pic is of a Kenetek 1176LN Rev F now owned by Chris Lord Alge. The givewaways are the 8 pin dip op amp used in the meter circuit and the massively oversized heatsink on the stud-mount zener diode, as these tend to run hotter as they get older. Another giveaway is the 10-turn pot used to zero the meter in GR mode. This unit uses an original UTC O-12 input transformer, original Clarostat bridged-T attenuator, original BPMC B11148 output transformer, original Urei power transformer, original Teledyne U2244 FETs, an original 5117 transistor for Q5 and original Motorola MPS U05 and U55 output transistors. It's about as close as you can get to the original.

Joe

Originally Posted by Mr.HOLMES

Any Questions?





This are just 3 pics I found thorough google there are many more and the layout is nearly the same regardless which revision....