Hello all, many thanks for all the responses to my questions. They are very much appreciated, and more importantly, learned, where I had to learn! An update: I reflowed the solders on the BNC connectors for both probes, and the solders on the AC-GND-DC switches. I also tried to clean out these switches using solvent on a cotton swap. Both switches are improved, but one still exhibits flakiness. I have new switches on order. As for the BNC connectors, the connector for the dead trace I had turned out to be the problem. Both traces work properly now, with appropriate amplitudes. Regards, Dan "Dan Beck" <biscuitbecks@*nospam*cableone.net> wrote in message news:13mjm7lbud7m0af@corp.supernews.com...> Hello all, > > I have been fooling (emphasis on fool) with an old Heathkit 10 MHz two > channel oscilloscope, which I believe was built in 1976 (it was given to > me several years ago). I have been able to calibrate the voltage on one > channel, but not the other. Sometimes, after I have spent some time > probing old pinball machine circuit boards using the one good channel, the > voltage flakes out such that there is minimal amplitude in the waveform, > and I can no longer observe good signals from the board in test. > > Does anyone here have experience with such a dinosaur? When the device > works it has helped me diagnose these old boards; I am just wondering if > there are any tips from the wisemen here in order for me to set this thing > up better, recalibrate, etc. > > Thank you in advance for reading. > > Regards, > Dan > >
Heathkit oscilloscope?
Started by ●December 19, 2007
Reply by ●December 22, 20072007-12-22
Reply by ●December 24, 20072007-12-24
On Sat, 22 Dec 2007 08:22:51 -0700, Dan Beck wrote: On Sat, 22 Dec 2007 08:22:51 -0700, Dan Beck top-posted:> many thanks for all the responses to my questions. They are very much > appreciated, and more importantly, learned, where I had to learn! > > An update: I reflowed the solders on the BNC connectors for both > probes, and the solders on the AC-GND-DC switches. I also tried to > clean out these switches using solvent on a cotton swap. Both switches > are improved, but one still exhibits flakiness. I have new switches on > order. As for the BNC connectors, the connector for the dead trace I > had turned out to be the problem. Both traces work properly now, with > appropriate amplitudes. >Cool! But bottom-posting is the convention. Cheers! Rich> > "Dan Beck" <biscuitbecks@*nospam*cableone.net> wrote in message > news:13mjm7lbud7m0af@corp.supernews.com... >> Hello all, >> >> I have been fooling (emphasis on fool) with an old Heathkit 10 MHz two >> channel oscilloscope, which I believe was built in 1976 (it was given >> to me several years ago). I have been able to calibrate the voltage on >> one channel, but not the other. Sometimes, after I have spent some >> time probing old pinball machine circuit boards using the one good >> channel, the voltage flakes out such that there is minimal amplitude in >> the waveform, and I can no longer observe good signals from the board >> in test. >> >> Does anyone here have experience with such a dinosaur? When the device >> works it has helped me diagnose these old boards; I am just wondering >> if there are any tips from the wisemen here in order for me to set this >> thing up better, recalibrate, etc. >> >> Thank you in advance for reading. >> >> Regards, >> Dan >> >>