Mainline Questions

[Tabaia]

here is another photo

[Paul Birkeland]

I'd leave your iron on those joints a bit longer.

[Tabaia]

Hi Paul,
I have done a fair bit of reworking and I think it might be good now,
Would you kindly have a look over the solder as well as the component placement.
I think is all correct however since i'm a first timer it would be great to have it looked over by someone in the know.
Looking forward to your response

Many thanks Tunji

[Paul Birkeland]

The 1N5820s and the 5W resistor have not been heated enough to be properly soldered. 

[Tabaia]

can you provide some constructive feedback please

[Paul Birkeland]

can you provide some constructive feedback please

The 1N5820s and the 5W resistor have not been heated enough to be properly soldered. 

[Paul Birkeland]

The bigger a part is, the more heat you need to apply to get the solder to flow out properly.  The two big resistors on your C4S boards in the R2 positions need more heat for the solder to flow out properly, and the MJE5731A transistors also need a lot more heat.  You can set your iron on one of these solder joints, add a little bit of solder, then count to 5, then pull it off.  You'll also see the solder suck into the board at some point when it has gotten hot enough, and you want to leave the iron on just a little longer after that happens.