If we want double the bias, is it just a matter of halving the values of R1-R4? I like my 5 wattz to be meaty
Yes, have fun! The ACA makes a great guitar amp if you disconnect the feedback, although there is still some through P1. You should be able to clean up the high end if you double up on JFETs (Q4) and cut R9 to 470 ohms. Bigger Q1s suffer from too much gate capacitance, so stick with IRFP240's. The circuit will work fine on 24V, just readjust P1 because the output voltage doesn't track the supply.
Kits & Boards are stocked at the order fulfillment center. Listed in the store in <24hrs.
Go to "store" in the menu band at the top of the page to check every hour!
Kits have the boards included.
The drilled and tapped heatsink pair is available separately
The power supplies are available separately. One will work for 2 channels, but two make sense
if you're making, monoblocks or if you just want the cachet of External PSU's, one per channel
Or there will be a package with the kit, pair of heatsinks, and two power supplies.
Go to "store" in the menu band at the top of the page to check every hour!
Kits have the boards included.
The drilled and tapped heatsink pair is available separately
The power supplies are available separately. One will work for 2 channels, but two make sense
if you're making, monoblocks or if you just want the cachet of External PSU's, one per channel
Or there will be a package with the kit, pair of heatsinks, and two power supplies.
Last edited:
Great!! And now its bed time over here
Cant wait to see them........'patience is a virtue'
Ying & Yang - I'll miss the first run, someone else wont - not the end of the world.......
Yes that would be great Im new to al this just on my first build B1 pre amp its at the post office got to pay import duty......... cant wait but I know it just a beginning after Ive built the amps got to get some BIBs done as well but before that will just have to see how much volume Ill get through the normal speakers hope it enough to feel good
Ordered!
Do someone knows the dimensions of the power jacks?
The jack on the amp is for a plug with a 2.5mm center pin. At Amp camp we just cut off the plugs on the PSU's and soldered them on because the plugs were unusual. The diyAudio PSU's have the 2.5mm pins so that's why we used that spec. The plugs seem to get bigger diameter as the voltage increases. 2.5mm is pretty common for 19v supplies
There are other size jacks AND plugs available at places like Parts Express, and I'd assume Digi-key...
Anyone seen this? looks like a great day place and vibe.........Im only up as ive got toothache but this has made the pain go away...............Now i just have to wait and hope that british customs are having a busy day dealing with other stuff.........
MAKE | My Day at Amp Camp
MAKE | My Day at Amp Camp