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Motorboating/buzzing
rotolactor
Junior Member
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Posts: 3
Threads: 2
Joined: Jan 2025
City: DURHAM State, Province, Country: United States
#1

7 hours ago
Working on a 40-130.  Recapped it, got rid of the rubber wires, and it's been working fine.  The tuning capacitor mounts were shot, so I replaced those, and the tuning mechanism works great.  In that process, I desoldered and resoldered three wires on the tuning cap, and removed and replaced two tubes close to the tuning cap.  Turned it on, and I get motorboating with no stations under it.  The frequency increases as you increase the volume.  Where should I begin in troubleshooting this?
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Messages In This Thread
Motorboating/buzzing - by rotolactor - 7 hours ago
RE: Motorboating/buzzing - by morzh - 6 hours ago
RE: Motorboating/buzzing - by morzh - 6 hours ago



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  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration