Before the app: w2aew revisits slide-chart calculators
The hobby-electronics channel's active catalog also covers amplifier impedance and handheld duplexer tuning.
Why this story? The channel's weekly summary: what went up this week, what is drawing views now, and where the channel stands among similar channels.
#416: Vintage Tools: Slide Chart computers/calculators - before there was "an app for that!"
A calculator didn't always need batteries, let alone a screen. In w2aew's vintage-tools video, slide charts offer a reminder of how quick calculations once fit into a simple mechanical gadget.
There were no new uploads this week, but the channel added about 49,000 views. Its subscriber count stayed unchanged, while daily viewing is currently a little above its usual level. Among nearby science channels, Astrum Extra had a much larger viewing week; w2aew's was the smallest weekly total in this group.
The slide-chart episode describes tools used across farming, plumbing and electronics, often handed out by companies as advertising items that also did a useful job. That practical streak connects neatly to the channel's other active lessons: calculations are only part of the point, measuring something is the other part.
The busiest video for daily views is "#412: Common Emitter Amplifier - Input and Output Impedance," which tackles both calculations and measurements, including the emitter-bypass case. It is drawing roughly twice the daily audience of the vintage-calculator episode. The other active tutorial, "#414: How to use an SV4401A VNA to tune a duplexer," moves into ham-radio test equipment, showing how to set up a handheld vector network analyzer to examine a band-reject duplexer's tuning adjustments.
Published on Trari
Where next?
The videos drawing views on w2aew right now
- Channel
- w2aew
- Subscribers
- 232,000
- Channel views, last 7 days
- 49,034
- Videos published this week
- 0
The numbers
Here is w2aew's week in views and subscribers.
💡 Test your knowledge
What does VNA stand for in w2aew's duplexer-tuning tutorial?
The tutorial uses a handheld vector network analyzer to examine duplexer tuning adjustments.




