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Ben Zotto
  • Member for 11 years, 2 months
  • Last seen more than a month ago
46 votes
3 answers
10k views

What are these "dogbone" traces for on (1970s era) PCB?

14 votes
3 answers
3k views

Why are these two electrolytic capacitors so hugely different in size?

7 votes
1 answer
677 views

How to safely ground a device plugged into an isolation transformer

6 votes
3 answers
598 views

What's the right replacement for vintage "glass cloth insulation" that transfers heat in Variac?

5 votes
3 answers
922 views

Why am I seeing -5 V or lower on the output pins reading an Intel 1702A EPROM?

4 votes
3 answers
1k views

What tool is used to crimp DIP connectors onto ribbon cable?

4 votes
1 answer
1k views

What is this obsolete (?) video screw connector called?

4 votes
2 answers
768 views

How to generate +5 V and -9 V voltages to read an Intel 1702A EPROM via Arduino?

3 votes
2 answers
465 views

Old Variac -- chassis ground? is it safe?

3 votes
2 answers
272 views

Is a 2N3906 an appropriate replacement for a BC158(B) in audio amp circuit?

1 vote
3 answers
1k views

Why are one channel's transistors in a power amp getting much hotter than the other's?

1 vote
3 answers
1k views

When is a non-polarized electrolytic capacitor inappropriate?

0 votes
2 answers
253 views

Transistor substitution guidelines? (and the BC147A)

0 votes
3 answers
140 views

What are the specific scenarios that an isolation transformer is useful for avoiding?

0 votes
0 answers
53 views

Basic shielding practice for simple passive audio project in an enclosure?

0 votes
0 answers
74 views

What is the stuff hardened on an old flyback transformer?