Amp Camp Amp - ACA

[Variac]

There should be a good number of board sets available. we'll try to keep them in stock, but we're also planning on another kit run.

Mark

[AudioSan]

okei

[agold]

Got my kit, very excited. Do you guys know when the step by step photo instructions will be available? I'm a total newbie here.

Thx!

[captain pugwash]

Is any matching needed for the mosfets ot jfets? Is there any benefit from matching and if so do the kits have matched transistors??

[Variac]

We're working on two different instructions. One will be the long term version with the clearest, and slickest production values, the other will hopefully be done very soon and will be a bit looser.

Of course you should read the article a couple of times. It live in the menu bar at the top of the page under "articles" or here:
http://www.diyaudio.com/index.php?pageid=articles

Originally Posted by agold

Got my kit, very excited. Do you guys know when the step by step photo instructions will be available? I'm a total newbie here.

Thx!

[Variac]

Originally Posted by captain pugwash

Is any matching needed for the mosfets ot jfets? Is there any benefit from matching and if so do the kits have matched transistors??

Nelson Pass really thought this through. And it being Single-Ended helps. The JFET input buffer is just one JFET, so no matching there, and the output device is a single MOSFET. It has a second MOSFET but that's for a different function- the constant current source, so no matching required or possible.

[Zen Mod]

Originally Posted by Variac

...... or possible.

do not underestimate creativity of common Greedy Boy .........

[Variac]

[LBHajdu]

I got my kit and built it and I am listening to it now. I will write a review, at some point, as I have solicited reviews from others. I am attaching some photos.

In the first photo you can see the built- up kit, there are some switches and binding-posts in the kit as well which are not yet attached in the photo. The board in the photo is powered-up I was adjusting the offset cold. It did not change much (only a few mV) when they got hot.

There are people that can stuff PCBs a lot neater then I can using special jigs to bend the leads I am sure there are some more detailed tutorials on this site. As can be seen from the pictures, I place the component (resistor in this case) on the board to get an idea of where to bend the leads. Then I use the needle nose pliers to bend the lead, never putting any pressure on the component side and making sure the value is facing up. If the spacing is right it should slide right into the board. I then bend the leads on the back side of the board so it does not slide out while I am soldering. Then the leads get clipped with wire cutters, holding on to the lead so it will not go flying.

These resistors seem a bit small to be 1/4Watt (I'm not sure what they are actually) I was actually expecting the brown Dale resistors. I just went ahead and use them, and there were no problems.

I got all parts needed to build the kit. However one strip of resistors was marked 1K on one side and 10K on the other, so just watch-out for that. I measured everything with a multimeter. You can see me measuring the resistors in the picture and in another pic you can see the 1K marking on the other side.

If there are any questions as to where or how components go, I am attaching a high resolution picture of the board. You should be able to see the markings on all the resistors.

Good luck to others,
Leve

[kangkangzhu20]

SO beautiful