- 2023
- Aug
- 29
The Findlay Radio Club Hamfest AND The Johnstown Swapper’s Day
Two events that always happen the week of Labor day are Johnstown (Ohio) Swapper’s, and the Findlay Hamfest.
Johnstown started out as a gun swap but turned into a general flea market. While not necessarily electronics related, you do tend to find some electronics related stuff there - typically more of a consumer nature.
Findlay, of course, is a hamfest that’s been going on since forever ago. It always has some good deals, even if it’s raining and not many vendors show up.
I doubt I’ll have any pictures from Johnstown, but there will be plenty from Findlay in the coming month or two.
Johnstown Swapper’s Day
https://jcscohio.org/swappers-day/
September 2-4 (Labor Day Weekend)
9A-6P Rain or Shine
Admission is $6, parking is free in surrounding fields.
Midway has multiple food vendors on site.
The show grounds are located on roads that are not meant to carry this much traffic, and will back up. Go early, if you’re not there when they open it may be difficult to get there. Last year it was so backed up some friends I know didn’t get in.
The Findlay Radio Club Hamfest
https://findlayradioclub.org/hamfest
September 10th, 2023
8A-1P Rain or Shine
Admission is $10, parking is free on site.
Usually 1-2 food vendors on site.
This is easy to get to, but good deals are early. Usually open a little before 8AM.
See you there!
- 2023
- Aug
- 15
Pictures from the 2015 Dayton Hamvention
2015 was the second to last year that the Hamvention was in Dayton.
One of the things I’ve noticed after looking at pictures from the last 20 years, is how the stuff that shows up has changed. In the 90s (no pictures, sorry!) there was a lot of your typical radio gear, but also a lot of golden age computing equipment and a lot of junk PC parts. Boxes of CPUs, hard drives, boards, etc. Early 2000s, the golden age computing stuff vanished to be replaced by a lot of audio gear, CBs, things of that nature. Consumer radios and televisions from the 1950s were in high supply and not that high of demand. 10 years later, consumer electronics from the 50s, 60s, and somewhat of the 70s was plentiful, but fading. Finally, the last few years, all of that old plastic radio stuff from the middle of the 20th century seems to have dried up, to be replaced with gear from the 80s (what’s still working,) and a lot of test equipment from the 60s and 70s, and some from the 80s.
As always, there are plenty of the normal “things” you find at a show like this - old Hallicrafters gear, R390s, etc. - but there’s nothing to listen to so they don’t go as quickly. But they’re still there.
What surprised me about the last show was the lack of those little $100-150 DSP SDR radios that are all over the online shopping sites. Who knows why, maybe they just aren’t as popular with the amateur crowd.
Here’s the pictures I took of the 2015 show, you can see lots of 1950s-1960s radio gear, and some oddball things that have vanished from view these days. It was an excellent day, warm, sunny, and as always, filled with people tripping over the charmingly broken pavement at Hara - hoping the sewer lines didn’t explode again!
My camera here wasn’t the best, and had a lot of trouble with anything that wasn’t full sun. A few of the pictures are slightly blurry, so my apologies in advance.
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This is a panoramic shot of one of the booths. I believe this guy had a bunch of equipment from the Western Electric North Carolina Works, but I can’t be sure. Some of that stuff tends to all run together.
Finally, the stuff I brought home. A CountyCom radio that was purchased from a dealer that was local to me(!), a book on 555s, some solder, LEDS, tape, and an Atari 2600 joystick. The radio was probably the most expensive item out of all of the stuff, and I still have it sitting on my desk at home. (Pay no attention to the biscuit mix in the background, that didn’t come from Dayton!)
While I do kind of miss the old venue, it’s time had come and gone, in part due to the owner’s neglect. It just seemed to attract a slightly different kind of vendor - Mendelson’s didn’t attend the Xenia show for the few years they had left, and some of the big “stuff on racks” vendors vanished. I’m not going to cry for the latter, however, those guys were a lot more expensive than they should have been, and I’m guessing companies like Rigol put them out of business.
Regardless, things change, and the new venue certainly has better food!
The next show is the Findlay Radio Club event at the Hancock County Fairgrounds in Findlay (of course!) This is always a good show assuming it doesn’t rain. Good stuff shows up without the prices you see at the bigger shows. Stay tuned for those pictures, as well as some from Fort Wayne if I can drag myself up there in November. I also have a few pieces of equipment on the bench, and will be talking about those as soon as I can.
Stay tuned for more stuff.
- 2023
- Aug
- 14
Pictures from the 2015 Findlay Radio Club Hamfest
More digging around in archives revealed a bunch of pictures from the 2015 show in Findlay. I can’t remember if this was the first or second year I went to this show, but it was quite large, and had a lot of things to see and buy, if you were so inclined. The weather was superb, a bright, sunny day.
While I didn’t have the best of cameras at the time, I still took a few good (and some blurry) shots of equipment and items at the show. This one was definitely worth the trip, and we stuck around until the show ended and vendors were packing up.
Next up is some photos from Dayton of the same year.
- 2023
- Aug
- 13
The only two pictures I took at the 2016 Hamvention
2016 was the last year for the Hamvention at Hara Arena, which was falling into serious disrepair. (It closed later that year.) To be fair, I don’t know how you could tell - the first time I went in the mid 90s it looked like it should have been condemned. Fortunately, I wasn’t there when the sewer lines burst…
I’m not sure why I took these two images, save one was a machine you don’t see in the wild very often. The other was probably because I knew someone that wanted said item, and it was a “Hey, you want this?” message. Regardless, here they are - my last little bit of the Hamvention at Hara.
Actual silicon solar panels. That was a pretty reasonable price for the time.
An IMSAI 8080 in all it’s glory. You just don’t see many of these in the wild.
Other than the rather generic telephone relay rack I brought home and took a picture of (complete with nutty friend comparing heights,) that’s it. I thought I took more than this, but I guess not!
- 2023
- Aug
- 11
My haul from the Columbus 2023 Hamfest
I really tried to be good this year and not drag home much. Some parts and things still made it into my car, however - I guess I just didn’t lock the doors or something.
But, I did limit myself to something I’ve been looking for (An AA5 radio and a tube tester,) some books, and a handful of parts. The only real impulse buy was the Simpson Meter - how can you pass up that awesome Bell System aqua and yellow? While it’s not of much use these days, requiring oddball 15V batteries, it’s still an interesting piece and will go on display with my other Bell System artifacts.
I wanted to bring home the big coffin radio that was at the show, but there’s simply no room for that. Some other test equipment caught my eye as well, but again - no room or need. I don’t need a 200W meter sitting in the rack drawing more current than the rest of the equipment!
Everything that I could test works well, and I kept spending to a minimum. I guess that leaves more money for later shows(?) We’ll see what Findlay brings…
- 2023
- Aug
- 11
The Columbus 2023 Hamfest
No rain threatened this year’s show, and there were a lot of vendors out - including some with a good deal of test equipment and other items. Lots of goodies, and everyone seemed willing to be negotiable on prices. My fellow show-goer and I spend the morning wandering around before heading over to the greasy spoon next door for some late breakfast grub and coffee.
I tried not to bring home much, but some stuff still wandered into my car. There are a few pieces I would have like to brought home, but space didn’t allow me to do so and they sadly had to remain where they were.
Here are my pictures of the event, and I’ll be posting my haul shortly.
Next show is the Findlay show, which always has some good stuff (assuming no rain!)
See you there!
- 2023
- Aug
- 8
Checking out a Heathkit AG-7 Signal Generator
This is a Heathkit AG-7 audio signal generator. One of Heathkit’s many pieces of test equipment, this one dates to the 1950s. It has a mix of tube names (most with RCA type labels) indicating it was probably in use for quite some time.
This was purchased at the Breezeshooter’s Hamfest in Butler, PA during their spring 2023 show. It was kind of a spur of the moment purchase. I initially passed it by, but picked it up on the way out.
I really don’t have a use for this item, but what caught my attention was the label on the side. This appears to have been in the rack at a central (phone) office in Erie PA. Was this device generating the craft access test tones? How many technicians listened to this device’s output over the years? It’s kind of cool to think about that.
The telcos were big fans of stamping stuff with ink instead of putting tags on thigs. That it has an actual General Telephone sticker is neat in itself.
Top of the device is a little dusty, so it appears that it was well cared for in it’s life and not just shoved in a barn somewhere.
Similarly, the bottom seems to be in good shape.
It almost looks like it was factory built,
But there are tell-tale signs it was probably put together by someone at the phone company. There is pencil labelling all over the chassis where someone was building it and making notes while they did. That’s always neat to find and gives you a connection to the person that built the device.
The case itself is in pretty good shape, just some surface rust where the paint was thin or damaged from use over time.
Small banana slicers are used to trim the output.
One of the terminals on the front was gone, but since those come apart easily, that’s to be expected. If I wanted to put this back into service, that would be easily fixed.
Here’s something that leads me to believe this was probably being used for test tone generation. Here’s the amplitude control. Note the two holes on either side of the pointer - this looks like it was strapped down at some point to give a known output level. The amplitude couldn’t be changed if the control couldn’t be adjusted.
The visual inspection of the device didn’t reveal anything that I felt was concerning enough, and some quick checks of capacitors and other potential failure points seemed to indicate there wasn’t any immediate issues. Time to plug it in!
All of the tubes lit up, so on to checking the output. I let it warm up for a bit.
I randomly picked 300Hz as my test point, and set the dial as close as possible. The scope revealed that the device was both off in frequency vs. the dial, and had some problems with waveshape. While I didn’t do any troubleshooting at this point, I suspect that there are some leaky parts simply due to the age of the device.
I ran up the scale with the frequency multiplier control, and it seemed to be pretty stable, generating the multiple of the selected frequency. I chose 3KHz as my next test point and adjusted the output to as close as possible to 3K.
The dial was off a ways. I’m guessing the trimmer capacitors will take care of this, I just need to sit down and read the manual.
Without changing anything, I selected the squarewave output. It looks good, but drops off considerably vs. the sinewave output.
I’m not sure if this is the intended behavior, so I will again refer to the manual that I have not yet read.
Overall, this is kind of a neat piece of equipment. While it’s functionality could be exceeded with a piece of more modern equipment, sometimes it’s nice to have something that won’t be damaged (much) by accidentally having B+ on an input. If time allows, I may try and get this device up and running. It will probably require some new parts, as all of the old ones have drifted with age.
That will be a project for another day.
