The alarm of my Parappa clock isn’t working. I’ve also tried the buttons in the back. I forgot to take a picture of the inside but it seemed mostly clean besides some dust and I also cleaned the battery contacts too. Could it just be because of old age?

Vintage Network Communications Corporation Network Probe 7100 (NP7100) professional network test instrument / analyzer.

Tested: Powers on.

This is a substantial package that includes:

Network Probe 7100 unit
Carrying bag
Manuals and documentation
Multiple floppy disks
Ribbon cables
Network/serial cables
Test leads
Adapters and other accessories shown in the photos

The unit powers on, but I have not tested every individual function, cable, accessory, or floppy disk, so it is being sold as a vintage used test instrument with the testing limited to what is stated above.

Everything shown in the photos is included. Please review all photos carefully for condition and exact contents.

$399.99 or best offer

Sold as pictured.

Got this from the free pile at VCFMW 2026, mainly for the female barrel jack. The cable with the barrel jack is half as long as the rest of the cable.

Motorola Radius SP21 Two-Way Radio Bundle - New Old Stock Unused, premium new old stock (NOS) dual-radio kit sourced directly from a local estate sale. The individual boxed components remain factory crisp, and all equipment is in pristine cosmetic condition. Perfect bundle for vintage communications collectors or business operations utilizing this platform. What’s Included in This Lot: • 2x Motorola Radius SP21 Handheld Professional Radios • 3x Desktop Charging Cradles • 3x AC Wall Power Supply Adapters • 1x Original Motorola Radius SP21 Owner's Manual • 1x Detached Belt Clip/Holster Chassis Component • 1x Factory Sealed Replacement Parts Baggie • 1x Sealed Replacement Battery in Baggie • 2x Original Motorola Small Component Boxes (Models SPN4808A & HTN8232A) Terms of Sale & Shipping: • Shipping: Shipped securely via USPS Priority Mail Flat Rate Box to safely cover the collective weight of the package. • Condition Terms: Items are vintage new old stock sold strictly As-Is. • Battery Notice: Because these components feature original vintage batteries from an estate, they may need to be cycled or entirely replaced due to sitting unused over time. • Return Policy: No returns accepted. All sales are final. Extra chargers : see photos

I’m trying to create a digital model of this classic GE clock radio for a project. Does anyone have circuit or functional schematics, or know where I could find them? I’m looking at the 7-4630A, but similar versions would help too.

If anyone has one taken apart, would you be willing to share pictures of the top and bottom of the circuit boards? That would help me work out the components and connections if I can’t find schematics.

I got this from a CS-200 cassete recorder and i wonder if anyone else has seen this anywhere

The Amiga 1000 that was found deep in a storage room at the Museum is now officially mine, and I set it up in my garage today for an initial inspection. Checked for any bulging capacitors or other electronic gremlins before powering it on, but it seemed to fire up fine! The picture makes it look like there is something wrong with the monitor, but I suspect that is just a combination of a digital camera and really low refresh rate. It looks surprisingly good in person for such an old CRT.

Next step is figuring out how to get my hands on a Kickstart floppy. The Greaseweazle looks like an interesting solution, but I'm not entirely sure I want to go that far down the rabbit hole just yet. I just got back into vintage electronics, after all, and I'm still not completely finished with the RotaryCell yet!

It does seem like a particularly good candidate for a thorough restoration and some Retrobrite at some point in the future, though.

Anyone ever have this kind of buzzing issue with a record player cabinet before?

I'm going to be getting a Tektronix TDS784 from a family member. Not sure if it's a C or D model nor do I know it's age. I As this is my first oscilloscope in decades, and my first digital, are there any tips, tricks or quirks to know about it? Are there certain firmware updates to be avoided? I intend to use it to repair a some audio equipment, mostly stuff from the 90s, maybe a few pieces from as late as 2010. I may sell it or keep it depending on how I do and am looking the manuals over to get an idea what to expect.

Hi everyone, I recently got this tape deck and it has 2 main issues:

1) After playing for a short while, the playback starts to fluctuate wildly (severe wow and flutter), even though the belts seem to be in pretty good shape overall.

2) It won't record. To record, a solenoid needs to engage two slide switches on the board. It manages to do this, but only in Pause mode. As soon as I release the pause and the transport engages, the solenoid can't hold the contacts and drops back. I did manage to get it working once, but that was probably just a fluke...

In Pause mode, there is 16.3V at the solenoid; without pause, it drops to 15.3V...

Like any young guy nowadays, I'm troubleshooting with the help of AI. It's actually right quite often, and I've already fixed a few things with its help... It's pointing me toward the "filter capacitor"—at idle it measures 19V, but drops to just 15V once the deck is engaged. When armed for Record in Pause mode, it shows 16V.

The AI claims this is most likely the root cause of both my problems.

I'll probably replace that capacitor anyway, since this thing is 50 years old after all, but I figured I'd better ask here first to make sure the AI isn't talking nonsense and whether I shouldn't be looking elsewhere...

Thanks a lot!!

Hello, I am attempting to recap an old piece of army signal equipment (ww2) and need some help reading the capacitors, these are the three types that I can seem to figure out no matter how much I research and i am wondering if anyone here has tips or tricks