![[-]](https://theultimatetone.com/images/collapse.png "[-]")
04-07-2021, 10:28 PM
Hi John
The pitch of close-spaced wire blocks on London Power PCBs is 0.1", so 2.54mm if you are using metric terminal blocks, although I have only seen metric in even millimetres: 2mm, 4mm, etc.0.1" is usually 0.1"
The mounting direction for the power BJTs is in the kit notes. It's my experience that very few people actually read the notes but do like to lose them a lot. You can leave the BJTs as they are instead of disturbing your connections and reheating the semis unnecessarily.
Do you have a Power Limiting Safety Socket? This is the Mandatory Project in TOT (Tonnes of Tone) (yes, metric tons here but inches on the PCB). The PLSS is essentially incandescent light bulbs in series with the device under test, which limits power provided the correct wattage bulb is used appropriate to the DUT power expectations. Using the PLSS saves $$ in fuses and in other components not yet burned. The most likely error in a new build is a solder bridge.
The pitch of close-spaced wire blocks on London Power PCBs is 0.1", so 2.54mm if you are using metric terminal blocks, although I have only seen metric in even millimetres: 2mm, 4mm, etc.0.1" is usually 0.1"
The mounting direction for the power BJTs is in the kit notes. It's my experience that very few people actually read the notes but do like to lose them a lot. You can leave the BJTs as they are instead of disturbing your connections and reheating the semis unnecessarily.
Do you have a Power Limiting Safety Socket? This is the Mandatory Project in TOT (Tonnes of Tone) (yes, metric tons here but inches on the PCB). The PLSS is essentially incandescent light bulbs in series with the device under test, which limits power provided the correct wattage bulb is used appropriate to the DUT power expectations. Using the PLSS saves $$ in fuses and in other components not yet burned. The most likely error in a new build is a solder bridge.
