 |
| Hikaru |
: |
Really? They can't be soldered,
can they? |
Photo 5
|
| Mr. Fusamura | : |
They can, but
there are some difficulties. When soldering
a transistor, we must use a heat sink (Photo
5) or a radiator to prevent heat conduction
from the soldering iron into the transistor.
When a heat sink is not available, it should
be pinched with tweezers.
But, since the currently available transistors
have improved performance to withstand up
to about 150ºC, we rarely use a heat sink
now. |
| Hikaru |
: |
It was bothersome to solder
transistors in those days. |
| Mr. Fusamura | : |
Will you use a heat sink if
you are worried about it? |
| Hikaru |
: |
No, I will not use it. But,
just let me see a heat sink. |
| Mr. Fusamura | : |
Here you are. This is a heat
sink. You had better use it if you are worried
about it. |
| Hikaru |
: |
I think I will. |
| Mr. Fusamura | : |
Hikaru, did you finish soldering? |
| Hikaru |
: |
Wait for a minute. I cut this
lead with the nippers, ?and I finished. But,
Mr. Fusamura, this kit does not include a
speaker. |
Photo 6
|
| Mr.
Fusamura |
: |
Well, then, you can use this. |
| Hikaru |
: |
Thank you. I solder these parts.
That's all. Mr. Fusamura, please check the
soldering condition. |
| Mr.
Fusamura |
: |
Let me see.
Hikaru, your soldering skill advanced quickly.
Your job is better than before, but there
is a slight variation in solder quantity.
What? Is this electrolytic capacitor mounted
with reverse polarities? (Photo 6) Wait a
moment. R2 and R3, and R6 and R7 are mounted
in the opposite positions. |
|
|
|
|
