UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - What is your oldest Homebrew / Kit still in everyday use?

Sideband · 2nd Jan 2008, 2:49 pm

Not in everyday use now but certainly the oldest homebrew item (and probably one of the simplest) is a simple signal tracer that was essential when tracing audio faults in Philips N4450 reel to reel tape recorders through all the complex switchery! Built in the mid-late 70's using a 2N2926 FET and a 741 op amp from a circuit in Practical Wireless. It still has it's uses and I added a diode input with a switch to check for elusive RF faults. I use it with a 'stethoscope' type earpiece from an old Grundig dictation machine. Works for years from a single PP3.

Rich.

2nd Jan 2008, 2:49 pm	#8
Sideband Dekatron Join Date: Oct 2003 Location: Croydon, Surrey, UK. Posts: 7,572	Re: What is your oldest Homebrew / Kit still in everyday use? Not in everyday use now but certainly the oldest homebrew item (and probably one of the simplest) is a simple signal tracer that was essential when tracing audio faults in Philips N4450 reel to reel tape recorders through all the complex switchery! Built in the mid-late 70's using a 2N2926 FET and a 741 op amp from a circuit in Practical Wireless. It still has it's uses and I added a diode input with a switch to check for elusive RF faults. I use it with a 'stethoscope' type earpiece from an old Grundig dictation machine. Works for years from a single PP3. Rich. __________________ There are lots of brilliant keyboard players and then there is Rick Wakeman.....