We mostly toured the buildings, but I went away disappointed as there were no test equipment vendors present - in fact, the only real TE vendor there was Bird, but they aren’t selling to me. The guy I was with was interested, however, as he needs a commercially available handheld SpecAn that isn’t a Chinese company.
I did pick up a few things here and there, but not much. Mostly rain discount stuff.
Here’s what I saw at the show:
A meter with the Niagra Power sticker on it.
Did I photograph this already?
I took it home. Gotta have a voltmeter at a show.
One Dollar Rain Discount. It has a burning smell.
UNIX, anyone?
110VAC single phase. Unusual.
Lots of reel-to-reel players.
A very precise balance beam scale.
Stacks of stuff, why we are here.
We left probably close to 1PM, as many of the flea market vendors had started to pack up. I skipped Sunday as there wasn’t anything I wanted to see, I was aching, and I wanted to play with some of the things I bought.
Next show is Breezeshooters in Butler, PA. See you there!
Friday turned out to be a just slightly damp day at the show, we had a little rain but it cleared off quick. We toured the flea market, and saved the buildings for Saturday due to the forecast of heavy rains. The steak tips and mashed potatoes vendor wasn’t here this year, so bourbon chicken and a banana milkshake subbed in it’s place.
This year, the mobile AM CB stuff was almost all gone save a few units here and there. Hobby-level test equipment, i.e. the EICO/Knight/Heath/etc. was almost not present, save for a bunch of those crappy RF generators that no one really wants - the bridges and tracers and things are pretty much no longer for sale. At least, not at Dayton. Of course, the piles of plastic radios and old televisions are long gone, and even the big boat anchor radios are vanishing. I think I saw maybe 1 Hallicrafters S-38 unit for sale…
Things are changing, but there was still a lot to see:
A nice A-K speaker.
A basket of Apples.
Just some audio stuffs.
A nicely restored cathedral radio.
Choke the Chicken…not here please.
An old Data Precision meter.
Many DEC Rainbow computers.
New, old-stock desoldering irons.
My favorite brand of tools?
Designed for butane flow measurements.
Some tunes for the ants.
No idea what this model was.
Someone's pride and joy, dumped in a bin.
I eventually took the scope for $1.
The old way of measuring standing waves.
Just some random HP things.
Ok, if you insist.
Loudenboomer!
Some info on the Loudenboomer.
Would you like to play a game?
It's not tourist season without a thumb.
Some military equipment.
Telephone B.C. (Before Cellular)
How many of these were made?
Moto comm analyzers.
A really nice condition scope.
Some old computing horsepower.
A really old opto counter.
This scope was in bad shape elsewhere.
Parts. I took a few transistors.
High voltage?
Used to be piles of this stuff.
These are vanishing as well.
Some more radios.
And some more radios.
A scope that was part of a school course.
Even if it was good, this showed bad.
Some sort of receiver.
A tape deck. Friend wanted it, you carry it!
Lots of these, no one wants.
Some of those funky round speakers.
I took the Sabtronics unit for a sawbuck.
Semiconductor testing devices…in peach.
A Shango Special.
I have no idea.
A table full of stuff.
Hallicrafters SX-62.
It's a radio that's a table that's a radio.
Teletypes for your 110 baud needs.
A cool old terminal.
daytonf26-terminalsettings-wereboar.jpg
The only signal tracer I saw.
A giant TRF radio.
A nice looking TRF unit.
Warm soda and melted candy anyone?
Surprising, more W-J stuff this year.
Some W-J stuff.
We spent pretty much the entire day, heading out at 4:45 a few minutes before closing. We went Saturday as well, but I skipped out on Sunday.
If you want to mail order a Dayton Hamvention ticket, now is the time! You have until May 1st, after which tickets will be held will-call at the gate. This is for domestic orders, international orders are being held will-call right now.
Mail order ticket sales have ended. All sales are now will-call.
I’ve added some new documents to the library, and I’m going to try and create a new zip every quarter.
This archive contains all of the documents I’ve collected for projects - at least ones that I can share. This is currently about 430MB, and is an archive of zipped files of many different kinds. Grab a copy here:
The first ‘fest of the season has come and gone. Notably, the dearth of CB radios from the past few years has started to fade. Unfortunately, all of the older stuff has started to fade away. There was still some interesting things to be seen, and I picked up a few interesting things for later projects and checkouts.
A Commodore 64, now 40+ years old.
These machines were not cheap, that's ~800$ today.
A unique clock kit. I took it home.
I don't know, some…thing with cool meteres.
cf2026-diskettes-wereboar.jpg
cf2026-equipment-wereboar.jpg
Another table of random things. These are getting rare.
OSHA? No sah!
A homemade flight sim rig.
Nothing much to hear these days.
Just junk on the floor for your parts needs.
People love those deaf-as-a-post Knight radios.
Some old meters. I took the Keithly and Heathkit.
A Hong Kong special. Probably deaf when new.
I never understood those weird Mac packages.
There's the orange “T” from Coshocton.
A lamp for your porch. Welding goggles not included.
A box of probes. I took the “EICO” style for my tracer.
Rat Shack Radios for days.
These used to be $10 all day. Not no mo!
A nice RCA radio.
A 27MHz RF curing machine. Could be someone's new linear.
Look at the size of that tube.
The business end of the cure. Cures…life, probably.
Almost got this and the next one as a real challenge project.
In bad shape…
Gimme one of those S-Pecans.
These are always a lovely piece of history.
We topped the day off with a stop at Arthur Treachers’ Fish and Chips, and then headed home.
Next up is Dayton, I’m planning on going all three days this year. As a reminder, you can still mail order a ticket - internationally until Wednesday, and domestically until May 1st. See you there!
I’ve had this big USB hub in my rack for some years. It’s mostly provided power for USB devices, but had a few actual USB devices that needed data plugged into it.
I came home last Friday to a “BEEP” - something rebooted. As I was putting things away from work, “BEEP.” Ok, something’s wrong. The hub was power cycling continually…well, the switching supply inside probably decided to go to lunch and not come back.
There’s not really that much inside of the thing - a power supply and some USB hub boards. Here’s the supply, it’s a fairly beefy 5V, 14A unit.
It claims to be made by UMEC:
The supply itself doesn’t look damaged, so it probably just finally popped. Maybe something died on one of the USB stacks…I don’t know.
I looked up the part number. It’s referenced - in China. I suppose I could put a different supply in there, or even an external brick…but do I really want to? Not really, I can just tap off the 5V line that’s on the system already running the few RPi units I have left. This will probably wind up put back together, in the “to go” pile.
This is an EICO 950A Resistor-Capacitor Bridge. It offers the things you’d expect from such a device. It’s odd in that it slots in-between the 950 and 950B, which were traditional EICO silver-face units. Not this one:
This one features EICO’s colorful scheme, much like the 145 signal tracer I wrote about a couple of years ago. It has comparator and leakage functions in addition to the standard R-C measurements. Leakage is provided by a neon bulb under a pilot jewel in the upper right corner, an unusual bayonet bulb that someone replaced with a standard #47 pilot, probably because they didn’t realize that it wasn’t working because it only lights when you’re using it…not when you turn it on.
The cabinet has seen some use and abuse.
Rusty Bottoms is playing this show tonight:
Even the inside is rusty.
The chassis shows a similar amount of rust. This thing had a wet, hard life.
That aside…let’s look at the inside.
Jay Hooks makes a lot of appearances here.
The underside, however, is “Mah boi, what did they do to you?”
Everything has j-hooks. Everything. Parts. Wires. Everything. ~~Why???
Exactly what was the previous owner trying to resolve here? Was the thing on fire? It amazes me this thing worked at all, especially with those capcitors flying around with no insulation. With all the wires being j-hooked to other wires…it’s like the person just replaced everything for no reason than to replace it.
I’m going to take this challenge, but I need to get a schematic first. I’ll look for one…stay tuned. Hopefully we can make this device a bit happier.
This was an interesting chassis. Not because it’s anything unusual in what it does, but because it definitely shows it was the lower end of the spectrum. Heathkit, Knight, EICO - all of those showed some concern and care in how parts laid in the chassis. This one? Not so much. Things everywhere, parts flying from one side to the other, such a mish-mash of parts and styles and type. I’m still not sure if this one was factory built or kit built, seeing as how it has pop-rivets for everything mounted on the chassis. Seeing as how some of the parts interfere with others, it probably was kit-built.
What do I think about this device?
There wasn’t really anything different about this rebuild except that it required a lot more thought on how to place things, I couldn’t simply move strips around a little or remove parts without drilling them out. That was quite the pain, but it was worked through and eventually everything was re-installed.
I took the opportunity to use some new sleeving I’d purchased, since many of the parts had spacing far longer than anything you could purchase without special dispensation. These parts had a lead j-hooked on, and run to their connection points. I tried to stick with more modern parts like 1% films, good capacitors, and the like - except for the one used in the leakage circuit. This 1.8MΩ @ 2W was hard to find, so I just chose another carbon that was closer to the marked value. It’s not really like it matters, but it is what it is.
I couldn’t get the unit to do much of anything. The eye would close when a part was attached, so something was happening. I’m not sure if the instrument is just that low on the scale, or if the parts I have are bad to the point of being unable to be tested by this device. Regardless, it didn’t seem to do much, and that’s pretty much what I expected. This wasn’t about an accurate instrument, it was about the rebuild process.
That’s all. This is just a footnote shelf queen. Next up is the Simpson 715, finishing up the rectifier section. After that, an EICO VTVM finally gets it’s time on the bench, and perhaps an EICO 950A - assuming I can find schematics for it because that one is a mess. Stay tuned!
Unfortunately, when hitting some of these parts with high heat, it tends to drive them (temporarily) back towards their actual values - especially in the case of carbon resistors where the heat may drive out some of the water the part has collected over the years.
In this case, the manufacturer provided a lot of surplus RN-type components, as the device is mostly WWII surplus. These held up well over the years, and probably were fine to leave in place - had they not been worked over when installed. Carbons…yeah, those probably weren’t anywhere near what they are now due to the 80W iron drying them out. Capacitors, for the most part, were well out of any tolerance, assuming there was a tolerance marked - or even a value marked at all.
Everything except the 68.1KΩ resistor is in this picture. That part was much like the 750KΩ, some small RN-type that I’m not familiar enough with to identify. It’s probably on the floor or behind some other item on my bench, hidden away due to size. Everything else is right here.
How did they test?
Capacitors, for the most part, are well out of anything I’d call tolerance unless you’re -20/+100. Resistors were mostly pretty good, being mil-spec parts. Carbons were probably better than expected because they were hit with a lot of heat - perhaps I’ll set the 820KΩ parts aside and see how they perform in a year.
In the chart, the following notations are used.
RN - Resistor qualified to MIL-R-10509
WW - Wirewound
DB - Dogbone, probably also RN
CC - Carbon Comp
A part of note
There were two weird metal can capacitors in the unit. There was no label on them, any paper label having come off probably sometime before I was on this earth. Placement suggested they were 0.02μF but they didn’t read anything like that:
I hooked it up to my Olson C-R bridge, but didn’t get any eye opening at all. I decided to run leakage and see what it did.
150V, and almost 8mA of leakage? This thing is shot.
Even at 50V, it leaks.
So…whatever these are supposed to be, they aren’t doing it anymore. I’ll toss them in the bin as known leakage test parts.
It’s time to power up the unit. I brought it up with a death cheater, and B+ settled in around 130VDC.
That’s probably about right for this, so I replaced the death cheater with a normal cord:
And brought it up assembled and stuck a capacitor in it.
Yeah, it doesn’t do much. Either all of the parts I chose are unable to be tested by this device due to bad components or something else, it didn’t do anything. The eye does close upon part connection, so something is home inside. Just…who knows what it is.
