Carver C1 going through rework

[Vynuladikt]

Kyle,
Any op-amp changes?
Let us know what you think of it after the mods.

 

[WOPL Sniffer]

Any op-amp changes?
Let us know what you think of it after the mods.

I change all the RC4136N opamps with NEW RC4136N from Mouser. Changing out all 9 of them costs about $20 and it does help quiet the C1 down. Skip the Brown Dog adaptor and OPA2134's (CHA CHING$$$$) you can't tell the difference and even Bill D said he wasn't sure he could tell the difference but you can't tell the Carver guys that even when they read it on their own site.

 

[WOPL Sniffer]

Any op-amp changes?
Let us know what you think of it after the mods.

The mods (except the Brown Dog and 150 1% resistors which both are a waste of time) make a big difference with most of the Bill D, my Power Supply Mod, the Gundry Notch filter, all the 4136's the gain board mods all add up and I have done a hundred of them...... I do most of that to the 4000T/C4000 and it makes a BIG difference.

 

[Vynuladikt]

I've done just cap upgrades and it was a nice improvement. And I thought it sounded great before. Have some new 4136s that are yet to be installed.

 

[mr_rye89]

I just swapped out the old RC4136s for new ones. I'm convinced the brown dogs/different op amps would just open up another can of worms, same with changing to 1% resistors. We'll get to the notch filter eventually.

I would like to see if I can 3D print that plate for the RCA jacks

 

[J!m]

Everyone knows you need 0.1% resistors to hear any difference...

 

[mr_rye89]

Everyone knows you need 0.1% resistors to hear any difference...

I used em in the Wyn Palmer phono amp I think. We'll at least 1% anyways

 

[WOPL Sniffer]

I just swapped out the old RC4136s for new ones. I'm convinced the brown dogs/different op amps would just open up another can of worms, same with changing to 1% resistors. We'll get to the notch filter eventually.

I would like to see if I can 3D print that plate for the RCA jacks

I'll send the file, do you want it in PNG, TIFF (you gotta make me one if it works which I don't see why it wouldn't.

 

[mr_rye89]

I'll send the file, do you want it in PNG, TIFF (you gotta make me one if it works which I don't see why it wouldn't.

Yeah pm sent

 

[J!m]

I used em in the Wyn Palmer phono amp I think. We'll at least 1% anyways

Using tight tolerance allows you to stay close to the design and simulations without testing and adjusting after build. More stable over time too presumably.

 

[WOPL Sniffer]

I just swapped out the old RC4136s for new ones. I'm convinced the brown dogs/different op amps would just open up another can of worms, same with changing to 1% resistors. We'll get to the notch filter eventually.

I would like to see if I can 3D print that plate for the RCA jacks

Any luck with those files?

 

[WOPL Sniffer]

Using tight tolerance allows you to stay close to the design and simulations without testing and adjusting after build. More stable over time too presumably.

I just tested 10 1/4 watt 1% metal film and 10 1/4 watt 5% and they both tested in spec. As a matter of fact I just ohmed out some 40 year old resistors in a C1 and they were within spec. If the unit was built correctly, taken care of, and only operated by Amazon Virgins, you'll never know. Go to one of your amps and change a 1% resistor to a 10% resistor. Even if it's off, you'll never know unless it's WAY off. Same reason changing the gain resistors from 200 ohms to 2K. you'll notice a decrease in volume but sound quality stays and thats a shit ton of percentage points. I built several BillD C1's and tested before and after going to 1%. Glen did the same if I remember correctly and the amp sounded no different so I quit changing 150 freaking resistors. Some guys just like to throw the Super Duper .00000001% resistors out there because they don't know what the fuck they are doing and got nothing better to do than poke the chest out and talk about their silk ties and penny loafers with a nickle in the slot. Anybody that knows stuff, knows that silk ties are used only for Auto Erotic AssFixAtion. Snake oil and speaker wire bridges and Oxygen Free Oxygen turned into .000002% Copper and 99.9 % bullshit. Carry on................

 

[mr_rye89]

Any luck with those files?

they look good. I'm going to try to get the image to scale and plug it into CAD, and see if I can come up with an STL and print a model

 

[WOPL Sniffer]

they look good. I'm going to try to get the image to scale and plug it into CAD, and see if I can come up with an STL and print a model

The CAD place I use lets you use the Tiff file to generate the Gerbers........... I should check my account because I may have the layout mostly done. I did start it but never finished. I have the dude online right now to see what format they want

 

[WOPL Sniffer]

they look good. I'm going to try to get the image to scale and plug it into CAD, and see if I can come up with an STL and print a model

Kyle, what format was the file in in the zipped folder I gave you?

 

[WOPL Sniffer]

they look good. I'm going to try to get the image to scale and plug it into CAD, and see if I can come up with an STL and print a model

I have 1 plate left, can you 3D scan it?