johnkretschmer
Substacknewsletter · by johnkretschmer
- Audience
- Not shown publicly
- We show a dash rather than guess
- Observed frequency
- Monthly or less
- From 4 posts indexed in the last 90 days
- Last post
- Oct 25, 2026
- 20 days ago
- Likely audience
- marine electronics technicians
- Inferred from post content
johnkretschmer is a Substack newsletter by johnkretschmer covering marine electronics, multimeter usage and DC voltage measurement. NewsletterFIT indexed 4 posts from it in the last 90 days, most recently on Oct 25, 2026.
Topics
- marine electronics
- multimeter usage
- DC voltage measurement
- boat maintenance
- electrical troubleshooting
Recent posts
- Marine Refrigeration…
- The 9th…
- The Case…
- Reefs and…
- Multimeter Basics…
Sponsors detected
No sponsored posts detected in the last 180 days of indexed posts.
Detected automatically from posts marked as sponsored. Detection can miss or misread placements.
See the full picture on johnkretschmer
Subscriber momentum over time, every detected sponsor with the source post, companies and people it mentions, guests, and an alert when any of it changes.
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Compiled from public pages · refreshed Nov 11, 2026 · How NewsletterFIT collects and labels data