Cape Fear Electronics (5 Viewers)

[Engineer8000]

Matt, your collection is impressive.

 

[ToyotaMatt]

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[Engineer8000]

Working on this today, a CB40M.

Opened it up and found this - two plugs not plugged in and several damaged wires. It looked like some wires broke off the connector, some soldered back to the top of the terminal in the connector. Very messy.

Spliced in some donor terminals and fixed damaged wires.

 

[Engineer8000]

Also, this unit was missing it's original microphone so I rewired a donor and soldered on a new DIN connector.

 

[Engineer8000]

Putting out about 3.5 watts

 

[Engineer8000]

Correct 13 pin PC board mount connector for emission modules.

 

[Engineer8000]

Emission control repair manuals for reference.

 

[Engineer8000]

Added 1973 to the library.

 

[Engineer8000]

1972

 

[Engineer8000]

Finished drawing the schematic for this tonight, Its the 72-74 89550-60010 emission module, it controls three VSVs depending on engine coolant temperature and vehicle speed. This one functions but is way off, it needs calibrated for the VSS input.

Some corrosion on the transistor cans.

 

[Engineer8000]

Replaced the two electrolytic caps. One of the film caps was bad too. Fully tested and calibrated.

 

[Engineer8000]

1971 Added.

 

[Engineer8000]

I've been doing some hifi work lately so I invested in this.

This is a 1kHz signal from my HP 8904A.

 

[CruiserTrash]

I've been doing some hi fi work lately so I invested in this.

View attachment 2968887

This is a 1kHz signal from my HP 8904A.

View attachment 2968889

What’s the floppy disk on that freq analyzer for?

For what it’s worth I run an 80s Tektronix scope and my signal generator is a very old Heathkit unit with tubes inside. It always measures deadly accurate in both frequency and voltage output. I should probably recap and retube it at some point. Although the world lost another tube factory recently - even less supply of new ones.

 

[Engineer8000]

What’s the floppy disk on that freq analyzer for?

For what it’s worth I run an 80s Tektronix scope and my signal generator is a very old Heathkit unit with tubes inside. It always measures deadly accurate in both frequency and voltage output. I should probably recap and retube it at some point. Although the world lost another tube factory recently - even less supply of new ones.

It's for saving plots to for analysis on a PC. Not sure if the software is still available for that. I am currently working on a Fisher 800B from the 60s. These old tube amps/receivers are great.

 

[Engineer8000]

I've had this TDS320 for about 20 years, never a problem with this one. Made in the early 90s. I had a Tek 468 DSO before this one.

 

[Engineer8000]

I've recently gotten more comfortable with the HP 54510B. The HMI for HP is a lot different than the Tek stuff.

 

[Engineer8000]

The first scope I had was like this one, I was poor:

 

[Engineer8000]

My second scope was like this one, moved up to triggered sweep, 5Mhz. I think I paid $25 for it.

 

[CruiserTrash]

@Engineer8000 I had a Heathkit scope like your Knight! Worked perfectly, but was difficult to read because there’s not much real estate on the display.

Now I have this Tek, which suits my needs for audio stuff

And here’s the tube-driven Heathkit signal generator. Again, it works for my very basic audio testing needs.

I really love old equipment. The way it operates and the way it looks. Here’s a resistance decade box I have. There was a grease pencil service mark on the back indicating 1944, so it’s older than that.

I also have what I think is a Navy-issue VTVM. It has a cover that seals it up water-tight. It’s still very accurate, though I don’t use it - it and the decade box are shelf decorations.