Forums

Heathkit oscilloscope?

Started by Dan Beck December 19, 2007
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 > >
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 >> >>