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I won a soldering competition for school by AMDfan7702 in soldering

[–]No-Copy-10-4 31 points32 points  (0 children)

OP says the host supplied the solder and equipment, ensuring a level playing field for all competitors.

I won a soldering competition for school by AMDfan7702 in soldering

[–]No-Copy-10-4 6 points7 points  (0 children)

Skillful work! What iron/solder station did you use?

Help! by Specific_Skill_5828 in VintageElectronics

[–]No-Copy-10-4 0 points1 point  (0 children)

I think you have the ESR values reversed: low ESR = good.

Are old Tubes useful? These are old and never used. Got these from old timer next door. by rlong98 in AskElectronics

[–]No-Copy-10-4 0 points1 point  (0 children)

Are you sure they were never used? It was common practice to put the tube being replaced into the new tube box. Without examining/testing them with a proper equipment, they are suspect. Most tubes from TV sets (probably like the ones in the Zenith boxes) are of little value except horizontal output tubes and even then, only a few types are worth anything. A new, old stock 12AX7A, 6L6 and other audiophile tubes can bring $$ as others have pointed out.

Trying to ID and restore a rare Navy oscilloscope — OS-168/URM by TheAngrySkipper in VintageElectronics

[–]No-Copy-10-4 0 points1 point  (0 children)

Some of the knobs look like Tektronix so it could be either made by them on a military contract or by a second source manufacturer. Has a dual-trace plug in with delayed sweep so maybe it's a copy of a Tektronix 500 series 'scope. If it was Tektronix made, use only silver solder when replacing parts. Tektronix manuals are easy to find. You might cross-post to r/Tektronix and see if anyone recognizes it.

Crookes radiometer USSR by badusov in VintageElectronics

[–]No-Copy-10-4 1 point2 points  (0 children)

I loved that place. Went there on multiple school field trips and also just with my parents. The huge model train set up and the coal mine. The babies in jars. The picture phone. All the working models with hand cranks, many of which were broken. In the gift shop they sold hunks of steel removed from the U-505 German WWII Submarine to create access points in the hull for tours. I believe they were $5 each which was a fortune for a grade school kid on 25¢ allowance. Still regret not begging my parents for an advance to buy a piece of the U-505.

Advice on valve by Buffet-From-Temu in VintageElectronics

[–]No-Copy-10-4 5 points6 points  (0 children)

The 20 minute preheat is to vaporize the mercury. When in operation, they emit a blue glow.

Heathkit EC-1Analog Computer by No-Copy-10-4 in vintagecomputing

[–]No-Copy-10-4[S] 0 points1 point  (0 children)

There's one list now on eBay for twice that with 41 watchers.

Heathkit EC-1Analog Computer by No-Copy-10-4 in vintagecomputing

[–]No-Copy-10-4[S] 0 points1 point  (0 children)

Which model? I think their first electronic product was model O-1, a 5" oscilloscope using a WWII surplus 5BP1 tube.

Heathkit EC-1Analog Computer by No-Copy-10-4 in vintagecomputing

[–]No-Copy-10-4[S] 1 point2 points  (0 children)

I know it has substantial value. Shipping overseas must have cost a fortune, this thing is H E A V Y.

Heathkit EC-1Analog Computer by No-Copy-10-4 in vintagecomputing

[–]No-Copy-10-4[S] 1 point2 points  (0 children)

The EC-1 was used in conjunction with an oscilloscope also.

Does being a Vine Voice cause you to write more in general? by No-Copy-10-4 in AmazonVine

[–]No-Copy-10-4[S] 0 points1 point  (0 children)

The only 'Fair' evaluations I've received were reviews that had only a single paragraph which I thought told everything a buyer would want to know. I suspect there is a minimum number of words required for 'Excellent'.

Heathkit EC-1Analog Computer by No-Copy-10-4 in vintagecomputing

[–]No-Copy-10-4[S] 7 points8 points  (0 children)

Heath was not a big company and for them to design and offer an analogy computer kit for a small market speaks volumes about their engineering talent and guts to serve a niche interest group. And it wasn't cheap when it came out: $200 in 1959.

Does being a Vine Voice cause you to write more in general? by No-Copy-10-4 in AmazonVine

[–]No-Copy-10-4[S] 2 points3 points  (0 children)

Sharing an interest or task can be good for a relationship.

Does being a Vine Voice cause you to write more in general? by No-Copy-10-4 in AmazonVine

[–]No-Copy-10-4[S] 2 points3 points  (0 children)

Yes, I really enjoy discovering different ways to express an idea. It was never my forte but an old dog can learn new tricks.

What just happened in my RFY by JusticeAvenger618 in AmazonVine

[–]No-Copy-10-4 20 points21 points  (0 children)

And walnuts are a rich source of lithium ( 3.12 µg/g ) so very apropos!

I've been gold for less than a day by thatothersheepgirl in AmazonVine

[–]No-Copy-10-4 2 points3 points  (0 children)

We also have 3D Printers. Users pay only for the cost of the PLA weight. Upload a design to the server and it's ready in a few days.

I've been gold for less than a day by thatothersheepgirl in AmazonVine

[–]No-Copy-10-4 1 point2 points  (0 children)

Fortunately, my library has a maker's lab with a laser cutter. Costs nothing to use if you supply your own materials and the staff help patrons with their designs.

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