18 Aug
2015
18 Aug
'15
2:16 p.m.
On 8/17/2015 11:14 PM, tony duell wrote:
Yeah, but the TIP31A part is cheap, and is free air mounted on its leads
- it isn't screwed down. I'd rather do the repair nicely. Anyway, it
gave me an excuse to order a 750 ohm resistor so that replacement
matches, instead of the 2 x 1.5K parallel pair I had put in.
JRU
Well, in the process of repairing the Altos power supply I managed to
break the center lead off of the TIP31A that feeds the 2N3055 series
pass transistor. This time, I need to order parts.
Do you? The centre lead (collector) is connected to the tab on that transistor. So a
solder tag under the mounting screw (against the tab, not on top of an insulating bush
linked to the appropriate pad on the PCB should fix it.