built the ACA's a couple days ago, I have 6 tube amps currently, and these buggars got my attention using a Shlagle TVC preamp with them very successfully and the an10 drivers in 2.8 cabinets. so little parts such good sound !
do you think these would do the job they seem a good price?
https://www.amazon.co.uk/SJP-LIGHT®...471512857&sr=8-3&keywords=24v+power+supply+5a
or would I be better off with a couple like this
https://www.amazon.co.uk/dp/B01DDX7JM2?psc=1 KeerSen DC 24V 5A 120W Switching Power Supply Regulated Transformer w/ Short Circuit and Over Current Protection (24V5A)
??
Last edited:
hi guys,
I hope you can help me answer this simple question regarding Keratherm MOSFET insulators.
Do we use both the pink pad and the brown pad (2 layers) to insert b/w the heatsink and the mosfet or we only use the pink pad and discard the brown pad as the pink pad can be peeled off from the backing brown pad.
Please let me know the answer ASAP 🙂
I actually finished putting the board and soldered them to both mosfet and I only use 1 single pink pad for the thermal insulator as shown in the illustrated guide. But when I watch the Youtube video from TekThing, they use both layers (Pink+Brown) for each mosfet. That's where my confusion comes in 🙁
Please see the image attached for my definition of PINK and BROWN pads (Please excuse me if I don't use the right technical term for these thermal insulator pads)
Pink pad
https://www.dropbox.com/s/r82xh1aclieslc3/PINK%20PAD.jpg?dl=0
https://www.dropbox.com/s/zed7uexdbwsvwj2/BROWN%20PAD.jpg?dl=0
Thanks,
Tom
I hope you can help me answer this simple question regarding Keratherm MOSFET insulators.
Do we use both the pink pad and the brown pad (2 layers) to insert b/w the heatsink and the mosfet or we only use the pink pad and discard the brown pad as the pink pad can be peeled off from the backing brown pad.
Please let me know the answer ASAP 🙂
I actually finished putting the board and soldered them to both mosfet and I only use 1 single pink pad for the thermal insulator as shown in the illustrated guide. But when I watch the Youtube video from TekThing, they use both layers (Pink+Brown) for each mosfet. That's where my confusion comes in 🙁
Please see the image attached for my definition of PINK and BROWN pads (Please excuse me if I don't use the right technical term for these thermal insulator pads)
Pink pad
https://www.dropbox.com/s/r82xh1aclieslc3/PINK%20PAD.jpg?dl=0
https://www.dropbox.com/s/zed7uexdbwsvwj2/BROWN%20PAD.jpg?dl=0
Thanks,
Tom
R15
If I order a kit today will the circuit board have a space R15? If not is the resistor used at one of the legs of Q3 included?
If I order a kit today will the circuit board have a space R15? If not is the resistor used at one of the legs of Q3 included?
I can't say about inclusion of the resistor in the kit, but I have a
recent-vintage ACA board and it has a space for R15.
Dennis
Good, thx. Gonna give these a try. Had success and more importantly fun building my first kit-Akitika power amp. Will try these next.
Thx, I ordered it. Look forward to the build. This will be my second build. First build was the Akitika power amp.
OK while I'm waiting for the kits to arrive, two questions
Wires: Should they be tinned before soldering them in?
Speakers: I'd be interested in speakers and their sensitivity ratings for these low power amps. Thanks
Wires: Should they be tinned before soldering them in?
Speakers: I'd be interested in speakers and their sensitivity ratings for these low power amps. Thanks
You can tin them if you like. It's not going to hurt anything. I don't.
As for speakers and little amps, more sensitivity is always better. As is a smooth impedance curve.
Once you hear these amps (totally awesome) you will really want one of the bigger First Watts, and build an Alpeh J or BA-3 or F6, etc... 🙂 🙂 🙂
As for speakers and little amps, more sensitivity is always better. As is a smooth impedance curve.
Once you hear these amps (totally awesome) you will really want one of the bigger First Watts, and build an Alpeh J or BA-3 or F6, etc... 🙂 🙂 🙂
THe suggested trimmer resistor is 5K 0.5w in part list.
Can i use 5K 250mw (1/4w) resistor?
Thanks in advance.
Can i use 5K 250mw (1/4w) resistor?
Thanks in advance.
Last edited:
LED-whats the best way to connect wires to LED leads to to have the length to reach the front panel? Any pictures would help.
Solder a wire to each leg and insulate with heat shrink tube.
Then slide a slightly larger heat shrink over the whole thing.
Then slide a slightly larger heat shrink over the whole thing.
Well you need the trimmer potentiometer to adjust the bias voltage to 10V as per the instructions. If you had a pot to use temporarily you could adjust it then measure the value and then insert a resistor (or a combination) or maybe start with a resistor in around a 2.5k value. Not sure if a smaller or larger resistor raises the voltage. You can (carefully) find out. Probably someone will say and once you know that you can proceed conservatively.
This question stems from my experience with tubes whose bias can change over time. Is that true with MOSFETS or is it a set it and forget it approach?
Best,
Anand.