tag:blogger.com,1999:blog-7590176649168185428.post8357649311646923492..comments2024-03-28T08:01:27.111-04:00Comments on SolderSmoke Daily News: Mr. Carlson Restores an All-American Five -- Tribal Knowledge! SITS! Flattening the Curve! (video)Bill Mearahttp://www.blogger.com/profile/07662500663603350847noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-7590176649168185428.post-64511946481600281532020-03-26T21:29:15.471-04:002020-03-26T21:29:15.471-04:00Now the system is showing me as Unknown. Strange....Now the system is showing me as Unknown. Strange.David W.https://www.blogger.com/profile/04898565815152557897noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-18063145566154988842020-03-26T21:28:32.599-04:002020-03-26T21:28:32.599-04:00I don't know why my previous comment (at 12:33...I don't know why my previous comment (at 12:33 AM) showed up as Anonymous but that is a different issue. This is KN4BXI. With a previous employer we routinely tested the fuse links the oscilloscope manufacturers provided to go between the probe and ground. Had many of the leads open but never lost a 'scope. David W.https://www.blogger.com/profile/04898565815152557897noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-11271704671769448772020-03-26T07:14:18.844-04:002020-03-26T07:14:18.844-04:00Yea, I misinterpreted the comment about the isolat...Yea, I misinterpreted the comment about the isolation of the variac. Mine is NOT isolated. But I have placed isolation transformers in both my S-38Es. I took the incorrect line out of the blog post -- I don't want to mislead anyone. Thanks for the good catch. 73 Bill Bill Mearahttps://www.blogger.com/profile/07662500663603350847noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-89382362464498753992020-03-26T00:33:18.784-04:002020-03-26T00:33:18.784-04:00Above comment is correct. If you will check Mr. Ca...Above comment is correct. If you will check Mr. Carlson's video where he describes his Variac, isolation, dim-bulb current-limiter<br /> setup, you will find that it has both a Variac AND an isolation xformer. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-91954825861275440692020-03-25T19:35:54.870-04:002020-03-25T19:35:54.870-04:00Double check the Variac to be sure it providing is...Double check the Variac to be sure it providing isolation. Most Variac's and other similar products are autotransformers and provide no isolation.<br /><br />Checking for isolation is simple. Inspect the wiring to see if the unit has two independent windings or perform a simple test. Set the unit to give about 60 volts out. Check each slot (blade slot) of the output for voltage to ground. (An analog meter is the best for this measurement.) If you measure more than a volt or two from either blade to ground, connect a 120 volt incandescent light bulb where you measured the voltage. If the light glows dimly or you measure many volts across the bulb, you do not have isolation.David W.https://www.blogger.com/profile/04898565815152557897noreply@blogger.com