Hi, i'm new to this diy stuff and English is my second language so i have a few question.
-EC7293+G4LEDR PCB $45ea (you'll need 2, to make a stereo amp)
-DualPole PSU PCB $40ea .....
1. Are these pcb also include all the component to solder an 2 channel amplifier?
2.I know the kits don't have power transformer, enclosure and heatsink. Anything else?
3. what is this Keratherm insulators ? can i use computer CPU thermal paste to replace it?
4. "18000uF to 24000uF per rail" is this capacitor value? why show like this? are they not include in the diy kits? how much for these 24000 uF?
5.Antek AS-3225 transformer- does it have to be 25v? can i buy a different transformer also have 2x 25v with 400va or 500va? rather have some spare amps ready for those 4ohms load.
6. Can this amp drive the 89db- 6ohms speakers- Nominal Input Power 100w- Frequency Response: 30 Hz-35 kHz . Sitting 2.5(8ft) to 3(10ft) meters away?
7."Input Capacitor: This one is less sensitive to capacitors compared to the DIY7297. It has provisions for the same PHE426 and other caps. There is a slot-hole next to the pads so you can zip tie on larger caps and it has extra pads on the bottom to connect off board/long input capacitors." <- Is this paragraph talking about upgrade Capacitor?
Kind Regards
-EC7293+G4LEDR PCB $45ea (you'll need 2, to make a stereo amp)
-DualPole PSU PCB $40ea .....
1. Are these pcb also include all the component to solder an 2 channel amplifier?
2.I know the kits don't have power transformer, enclosure and heatsink. Anything else?
3. what is this Keratherm insulators ? can i use computer CPU thermal paste to replace it?
4. "18000uF to 24000uF per rail" is this capacitor value? why show like this? are they not include in the diy kits? how much for these 24000 uF?
5.Antek AS-3225 transformer- does it have to be 25v? can i buy a different transformer also have 2x 25v with 400va or 500va? rather have some spare amps ready for those 4ohms load.
6. Can this amp drive the 89db- 6ohms speakers- Nominal Input Power 100w- Frequency Response: 30 Hz-35 kHz . Sitting 2.5(8ft) to 3(10ft) meters away?
7."Input Capacitor: This one is less sensitive to capacitors compared to the DIY7297. It has provisions for the same PHE426 and other caps. There is a slot-hole next to the pads so you can zip tie on larger caps and it has extra pads on the bottom to connect off board/long input capacitors." <- Is this paragraph talking about upgrade Capacitor?
Kind Regards
It would be very absurd to try and make one. The PSU is +/PG/- not +/-. That means you can't just use any large battery because nothing would work. You have to use numerous large batteries to be able to get basically 74v and then center tap them. It'd be a nightmare and you might need to brace your floor.
It uses 25vac x 2 that gets rectified to 35v~ . It's a +35/ground/-35 supply to each amplifier.
What's the part numbers for the nylon standoffs and screws you used here? Thanks.
backordered
Hey! 🙂
These are backordered at Mouser. Is it possible to just swap them with parts of equal value or do you have specific recommendations? Itching to start the build now!
505-MKP2D031001F00KF
71-RN55D-F-1.0K
647-UES1C102MHM1TO
Hey! 🙂
These are backordered at Mouser. Is it possible to just swap them with parts of equal value or do you have specific recommendations? Itching to start the build now!
505-MKP2D031001F00KF
71-RN55D-F-1.0K
647-UES1C102MHM1TO
it's a waiting game
So I'm still waiting for transformers to arrive, but anxious to get going! Thought I might put together the PSU-boards and find out where everything goes in the meantime.
So what are the resistor values on the Dualpole? Is r3 and R4 the bleeders?
So I'm still waiting for transformers to arrive, but anxious to get going! Thought I might put together the PSU-boards and find out where everything goes in the meantime.
So what are the resistor values on the Dualpole? Is r3 and R4 the bleeders?
Hi Destroyer OS,
Hope all is well with everything going on these days!
Just a quick question... On the amplifier PCB, there's a capacitor near the PVI cells. It does not seem to be part of the Mouser BoM. Could you please let me know if it is used and if yes, what value or part number? Is it the 680uF 16V cap?
Thanks
Do
Hope all is well with everything going on these days!
Just a quick question... On the amplifier PCB, there's a capacitor near the PVI cells. It does not seem to be part of the Mouser BoM. Could you please let me know if it is used and if yes, what value or part number? Is it the 680uF 16V cap?
Thanks
Do
Yes the 680uf is for that spot. But don't forget you need a 680/1000uf for the feedback position to. You can use the same caps. The Rubycon from digikey was my fav but you might want to play around with one of those sockets I mentioned.
I have not. I personally am not a fan of them in any location thus far. I did try them for feedback in another device once.
It wouldn't surprise me if people found all sorts of caps they like. Even though the amp has low distortion you can still change the flavor pretty good between the input and feedback cap to whatever you like.
It wouldn't surprise me if people found all sorts of caps they like. Even though the amp has low distortion you can still change the flavor pretty good between the input and feedback cap to whatever you like.
Just tested one of the PVI cells with LED on top and I'm getting 9.25V. I realize that the 2w 330 ohms resistor on top of the LED driver mezzanine is getting smoky hot. I can smell it after 10 seconds. Is that a normal behavior?
Thanks
Do
Thanks
Do
Looking at the functional performance curve, this resistor would be 70% power @ 110 Celcius, which is about 1.4W. I just don't know how high it will rise since I only let it sit for a minute or so...