Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
100MHz HP scopes
#1
I thought I'd mention to everyone in the Corvallis area that the OSUsed store has a bunch of 100MHz HP DSOs for around $75 apiece. A bunch of them got snapped up, but I recall seeing some left if folks need such a thing. Many had probes with them. I don't recall the model number, but they are the same vintage as the 54542A that I picked up.

The OSUsed store is open tomorrow, Wednesday, starting at 12:00 noon to 3:00 p.m.
Reply
#2
Whoah, that's a pretty good deal! I've got a friend that works at OSU and gets off work at noon tomorrow - he's going to go take a look and pick me one up. That's not bad, if they work. It is amazing what you can do if you have a DSO and make a few little tools and adapters to use with them.

Thanks for the heads-up!
W0ULF 2011+
ex KF7RJU 2011-2011
ex KC7YNP 1997-2007
Rigs: Heathkit RX-1 Mohawk Receiver and HX-10 Marauder Transmitter, IC-7410 Base HF w/AH-4, IC-2720 Mobile Dual Band, IC-V8000 Go-Bag 2m, IC-2820 base 2m/70cm (That goes to Field Day or goes in the other truck when I'm driving it), Kenwood TH-75A and Icom IC-92AD HTs.
Reply
#3
Woo, got one! Sadly, it fails several self tests. Darn. I'll have to play with it to see if it is repairable or if the failed tests really amount to anything. We'll see.

Still quite a deal!
W0ULF 2011+
ex KF7RJU 2011-2011
ex KC7YNP 1997-2007
Rigs: Heathkit RX-1 Mohawk Receiver and HX-10 Marauder Transmitter, IC-7410 Base HF w/AH-4, IC-2720 Mobile Dual Band, IC-V8000 Go-Bag 2m, IC-2820 base 2m/70cm (That goes to Field Day or goes in the other truck when I'm driving it), Kenwood TH-75A and Icom IC-92AD HTs.
Reply
#4
Update on the 54501A - it won't hold calibration between power cycles, so you have to calibrate it each time you power it up. Although this takes about half an hour to go through, at least it has the ability to be calibrated without anything fancier than a cable with BNC connectors on each end, as it has built-in AC and DC reference signal generators. I'd call it a win for the home team. Thanks again to everyone that had encouraging words, and to Jeremy for the tip about them being available. Also, this is a late 80's (88/89 or so) era scope. Don't expect a flashy new Cadillac.
W0ULF 2011+
ex KF7RJU 2011-2011
ex KC7YNP 1997-2007
Rigs: Heathkit RX-1 Mohawk Receiver and HX-10 Marauder Transmitter, IC-7410 Base HF w/AH-4, IC-2720 Mobile Dual Band, IC-V8000 Go-Bag 2m, IC-2820 base 2m/70cm (That goes to Field Day or goes in the other truck when I'm driving it), Kenwood TH-75A and Icom IC-92AD HTs.
Reply
#5
Those things have a nvram in them that is backed up by a lithium battery inside the chip package. If you replace the chip it should hold cal again. See http://forums.adafruit.com/viewtopic.php?f=8&t=2922
Reply
#6
Oh, hey, thanks for the heads-up. Sure enough, there's a good ol' Dallas Real Time Clock module on the board. Wow, haven't seen one of those in a while. Apparently they don't make this model any more, but they DO have a "drop-in" replacement. Looks like it is time to find some solder wick and get to work. Thanks again!

Edit - I didn't see your link and did some research and came up with the very same page. :^)
W0ULF 2011+
ex KF7RJU 2011-2011
ex KC7YNP 1997-2007
Rigs: Heathkit RX-1 Mohawk Receiver and HX-10 Marauder Transmitter, IC-7410 Base HF w/AH-4, IC-2720 Mobile Dual Band, IC-V8000 Go-Bag 2m, IC-2820 base 2m/70cm (That goes to Field Day or goes in the other truck when I'm driving it), Kenwood TH-75A and Icom IC-92AD HTs.
Reply
#7
I have had good success in a removing the top of the dallas chips and accessing the battery. I went through one of my boxes, but didn't find the chip that you need. Sounds like a good buy on that scope!
Reply


Bookmarks

Forum Jump:


Users browsing this thread: 1 Guest(s)