Hi. You're welcome, hope everything will run fine. Just started to assemble the PCB, a reminder: This AMP PCB version is called ''BOTTOM'', for a good reason, some parts, in particular the the tube sockets need to be mounted ON THE BACK of the pcb.
So once the amp pcb is assembled, the tubes are mounted on the bottom, and pointing toward the top of the amp, meaning that the PCB top is in fact pointing toward the bottom. The adjustment trimmers R5/R41/R42 are also accessible from the top, so mounted on the back of the pcb...
Other wise the tube will be assembled in reverse, and the amp won't work...Hope it is clearer...
SB
So once the amp pcb is assembled, the tubes are mounted on the bottom, and pointing toward the top of the amp, meaning that the PCB top is in fact pointing toward the bottom. The adjustment trimmers R5/R41/R42 are also accessible from the top, so mounted on the back of the pcb...
Other wise the tube will be assembled in reverse, and the amp won't work...Hope it is clearer...
SB
And one last reminder: THIS CIRCUIT IS OPERATING UNDER HIGH VOLTAGES! Take great care while testing, to process with caution. Also try to assemble the circuit in step, and double check after each step, for example, assemble first the power supply pcb, and test each sections one after the other, before connecting to the amp pcb, then assemble one amp, test it, etc...
SB
SB
The BOM calls for 0.6W Resistors, are the small blues ones all 0.6W, they look like 1/4W to me.
Yes, they are 0.6W... Check the BOM, and take any MBB02 resistors part number, insert it into Mouser and check the specs, you'll see 0.6w...
If you prefer to use the 1W version, the PCB accept the larger size body as well...
Btw already had a few requests for some extra boards. If interested let me know, I'll probably order some pcb anyway within 1-2 months...
SB
If you prefer to use the 1W version, the PCB accept the larger size body as well...
Btw already had a few requests for some extra boards. If interested let me know, I'll probably order some pcb anyway within 1-2 months...
SB
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Hi. Here the latest BOM. Found one incorrect part number for Amp R10, and changed a few parts numbers to replaced long back ordered parts.
Please use this BOM instead for your orders. Received all the parts to complete my PCB (except the transformers). I'll do checks using test power supplies. Stay tuned...
Thanks
SB
Please use this BOM instead for your orders. Received all the parts to complete my PCB (except the transformers). I'll do checks using test power supplies. Stay tuned...
Thanks
SB
Hi Mafalda, yes you did, you uust need to pay for shipping, see your private email.
As for 2mm PCB, I did some in the past, and problem with them is when you want to unsolder parts, and that happens! it makes unsoldering much more difficult. Often heating on one side, doesn't melt the solder on the other. Same thing with soldering...
It makes working with the board more difficult, and can cause some problems for some less experienced builders.
I made countless project with 1.6mm pcb without problem, and most of the pro used them as well.
Last question is also the price that is much more expensive if not using the standard 1.6mm, and its impact on the package weight and shipping costs. Now in these days after Covid, shipping costs are almost as high as the pcb costs themself, and then it would impact shipping cost back to you...
SB
As for 2mm PCB, I did some in the past, and problem with them is when you want to unsolder parts, and that happens! it makes unsoldering much more difficult. Often heating on one side, doesn't melt the solder on the other. Same thing with soldering...
It makes working with the board more difficult, and can cause some problems for some less experienced builders.
I made countless project with 1.6mm pcb without problem, and most of the pro used them as well.
Last question is also the price that is much more expensive if not using the standard 1.6mm, and its impact on the package weight and shipping costs. Now in these days after Covid, shipping costs are almost as high as the pcb costs themself, and then it would impact shipping cost back to you...
SB
Mafalda shipping cost to France is 11.25U$, please send the funds to my paypal at: algar_emi@hotmail.com
Thanks
SB
Thanks
SB