Those crimping tools make perfect pro crimps on those. Best $22, I have spent.
A tip: use a small wire like axial resistor lead inserted into the connector to allow you to place it in the crimp jaw, squeeze down partially, pull out resistor “handle” and insert stripped wire. Do not have more than 2mm of wire or it will interfere with jack insert action.
A tip: use a small wire like axial resistor lead inserted into the connector to allow you to place it in the crimp jaw, squeeze down partially, pull out resistor “handle” and insert stripped wire. Do not have more than 2mm of wire or it will interfere with jack insert action.
Buying PCB special (BF862 onboard)
Hi to all,
XRK many thanks for this project. Think I'm going to take advantage of the PCB special. Already have most of the components. Can get the FETs from RS Components.
Are there possibly any other DIYers in South Africa who would like a board or two? It would make sense to place a single order and save a bit on shipping costs.
If anyone is interested PM me and we can take it from there.
Kevin (Pretoria)
Hi to all,
XRK many thanks for this project. Think I'm going to take advantage of the PCB special. Already have most of the components. Can get the FETs from RS Components.
Are there possibly any other DIYers in South Africa who would like a board or two? It would make sense to place a single order and save a bit on shipping costs.
If anyone is interested PM me and we can take it from there.
Kevin (Pretoria)
Last edited:
I just sent out two DCA’s and almost forgot to include the free BF862’s (these are from original Mouser stock on same reel and adjacent to each other so good chance of matching pretty well). I still marvel st the PCB - heavyweight and coated with gold and perforated with a thousand vias plated through with gold. Beautiful board.
Btw, new amp I am working on - sounds fantastic. Very powerful and dynamic, low distortion design with all DC coupling.
Simple High Performance DC Coupled Class A HPA with sub PPM THD
Simple High Performance DC Coupled Class A HPA with sub PPM THD
Looks good! Got any measured FFT? or is this still in simulation?
By the way, if anyone finishes their build along with chassis, share for reference
Mine is still stuck in customs.
Today marks 2 weeks in customs..
It’s in the other thread:
Sorry to hear about your customs issue. What country?
Here's mine. Sounds very nice. Need to get some PSU caps that fit on the top of the board. The WIMA caps take up a lot of room.
Nice job.
Those are big Wima’s!
@xrk India.. :/ specifically.. Bangalore. Not uncommon.. Actually its my fault.. I shouldve mentioned that USPS is a no go.. It's India posts that's delaying it so much. FedEx or DHL would've been a lot faster
Edit: I DID try to.. But you had sent it by then : ))) ah well.. Good things happen to those who wait?
Edit: I DID try to.. But you had sent it by then : ))) ah well.. Good things happen to those who wait?
Send me a message on Etsy shop and let me check on shipping for this item. If more than 40days for international shipments, I will send you replacement at no charge.
I've just measured mine. I don't have matched transistors so voltage is 8.88V one side and 9.2V on the other.
I adjust each side independently to 0.5 VCC?
Yes, if Vcc is 20v then aim for 9.5v to 10v by adjustment of 1k1 resistor to a lower value. You could even put a pot there temporarily and then measure value and replace with fixed. This is only important if you plan on playing loud near clipping to get a balanced top vs bottom clip point. If you never play near 500mW, just leave it.
I was at Ikea today - who would like a swedish designed mounting for amps?
ISBERGET Tablet stand - white - IKEA
Seems almost perfect - mount the amp on stand offs on the larger part, use the smaller part to mount the sockets. Plenty of space for the DC step up as well / could be mounted underneath for a cleaner look.
I bought a couple to try
ISBERGET Tablet stand - white - IKEA
Seems almost perfect - mount the amp on stand offs on the larger part, use the smaller part to mount the sockets. Plenty of space for the DC step up as well / could be mounted underneath for a cleaner look.
I bought a couple to try
This case from Aliexpress is very good - all holes pre-cut. $36 for a CNC case, shipping included.
Aliexpress.com : Buy PH I Headphone Amplifier All aluminum Chassis Preamplifier Enclosure Mini Case DIY Box from Reliable box all suppliers on Breeze Audio Store
The pot shaft diameter is larger than usual, maybe it wants a full size blue velvet "box" type pot.
I would highly recommend underhanging the MOSFETs and bolting to the bottom panel. As there is no air ventilation, this would be best to keep things cool inside.
Aliexpress.com : Buy PH I Headphone Amplifier All aluminum Chassis Preamplifier Enclosure Mini Case DIY Box from Reliable box all suppliers on Breeze Audio Store
The pot shaft diameter is larger than usual, maybe it wants a full size blue velvet "box" type pot.
I would highly recommend underhanging the MOSFETs and bolting to the bottom panel. As there is no air ventilation, this would be best to keep things cool inside.
Last edited: