Problem is Dennis, not everyone on this list has the experience you do. You have to remember, there are some newbie techs on here. Jeff FAX 1-413-280-0677 Jeff Dougherty Intrepid Video & Electronics 501 Luther Rd Harrisburg, PA 17111 717-909-8844 VCR tips, electronics info & general interest. www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com ----- Original Message ----- From: "Dennis Viereck" <wa6ati@xxxxxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Monday, February 04, 2002 12:51 PM Subject: [TechAssist] Re: Isolation transformer question > > I can't believe this thread has gone on as long as it has. Am I to understand > that there are technicians out there that are confused about the usage of this > instrument. Geez I used isolation transformers since the cheapie series string > filament televisions of the mid 60's. This is nothing new guys. > You always isolate the TV! > > Jim Myers wrote: > > > The scope is not what should be isolated, the unit under t.e.s.t. is what > > should be isolated. The UUT should be isolated from scope, soldering iron, > > etc. > > Jim Myers > > jr.myers@xxxxxxxxxxx > > ----- Original Message ----- > > From: "Minesafe" <minesafe@xxxxxxxx> > > To: <techassist@xxxxxxxxxxxxx> > > Sent: Monday, February 04, 2002 10:33 AM > > Subject: [TechAssist] Re: Isolation transformer question > > > > We have all our scopes on their own iso transformers. But we had to cut all > > the grounding pins off the plugs. Why do they make an isolation transformer > > and then give it a common ground through the ground pin on the three wire > > line cord? > > > > Jim > > > > minesafe@xxxxxxxx > > MineSafe Electronics > > Contributing to safe mining since 1975 > > ----- Original Message ----- > > From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx> > > To: <techassist@xxxxxxxxxxxxx> > > Sent: Sunday, February 03, 2002 2:37 PM > > Subject: [TechAssist] Re: Isolation transformer question > > > > > > > > Thanks to everyone for their input on this. > > > I appreciate it. Mine has only two outlets, both are protected. > > > Jeff > > > > > > FAX 1-413-280-0677 > > > Jeff Dougherty > > > Intrepid Video & Electronics > > > 501 Luther Rd > > > Harrisburg, PA 17111 > > > 717-909-8844 > > > VCR tips, electronics info & general interest. > > > www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com > > > > > > > > > ----- Original Message ----- > > > From: "MikE" <patsvcr1@xxxxxxxxxxx> > > > To: <techassist@xxxxxxxxxxxxx> > > > Sent: Sunday, February 03, 2002 11:45 AM > > > Subject: [TechAssist] Re: Isolation transformer question > > > > > > > > > > > > > > ALSO - be certain not to plug your scope (or > > > > other test eqpt) into non-isolated outlets > > > > and use while using the > > > > iso-xfmr ... most test gear has three wire > > > > ac cords which can lead to unexpected smoke > > > > .... MikE > > > > > > > > -----Original Message----- > > > > From: techassist-bounce@xxxxxxxxxxxxx > > > > [mailto:techassist-bounce@xxxxxxxxxxxxx] On > > > > Behalf Of Damon > > > > Sent: Saturday, February 02, 2002 2:48 PM > > > > To: techassist@xxxxxxxxxxxxx > > > > Subject: [TechAssist] Re: Isolation > > > > transformer question > > > > > > > > > > > > Yes it will protect your scope from damage > > > > while you're working on the SMPS > > > > primary, as long as you don't plug in the > > > > scope and the TV on the same > > > > outlet on your transformer. > > > > The only thing you lose is YOUR protection > > > > should the transformer's > > > > wiring/winding decide to short to the metal > > > > case parts. > > > > Damon Brunger > > > > damon101@xxxxxxxxxxxxxx > > > > Telrad Electronic Services > > > > Ft Wayne, IN 46815 > > > > ----- Original Message ----- > > > > From: "Jeff Dougherty" > > > > <jeff@xxxxxxxxxxxxxxxxxx> > > > > To: "Techsonline" <techassist@xxxxxxxxxxxxx> > > > > Sent: Saturday, February 02, 2002 1:31 PM > > > > Subject: [TechAssist] Isolation transformer > > > > question > > > > > > > > > > > > > > > > > > Can anyone tell me if an isolation > > > > transformer can still protect when > > > > > plugged into an ungrounded-two prong > > > > outlet, such as in older homes? > > > > > Thank you. > > > > > Jeff > > > > > > > > > > FAX 1-413-280-0677 > > > > > Jeff Dougherty > > > > > Intrepid Video & Electronics > > > > > 501 Luther Rd > > > > > Harrisburg, PA 17111 > > > > > 717-909-8844 > > > > > VCR tips, electronics info & general > > > > interest. > > > > > www.intrepid-video.com www.tech-repair.net > > > > www.thetoolcaddy.com > > > > > > > > > > > > > > > > > > > > ------------------------------------------ > > > > > Make your TechAssist database better! > > > > > Submit Repair Tips here: > > > > http://www.tech-assist.org/secure/tip/ > > > > > ------------------------------------------ > > > > > To UNSUBSCRIBE your email address, click > > > > here: > > > > > > > > > mailto:techassist-request@xxxxxxxxxxxxx?subj > > > > ect=unsubscribe > > > > > Or send a BLANK email with unsubscribe in > > > > the > > > > > SUBJECT field to the address above. > > > > > > > > > > > > > > > > > > > > > > ------------------------------------------ > > > > Make your TechAssist database better! > > > > Submit Repair Tips here: > > > > http://www.tech-assist.org/secure/tip/ > > > > ------------------------------------------ > > > > To UNSUBSCRIBE your email address, click > > > > here: > > > > mailto:techassist-request@xxxxxxxxxxxxx?subj > > > > ect=unsubscribe > > > > Or send a BLANK email with unsubscribe in > > > > the > > > > SUBJECT field to the address above. > > > > > > > > --- > > > > Certified Virus Free. > > > > Checked by AVG anti-virus system > > > > (http://www.grisoft.com). > > > > Version: 6.0.320 / Virus Database: 179 - > > > > Release Date: 1/30/02 > > > > > > > > --- > > > > Certified Virus Free By MikE > > > > Checked by AVG anti-virus system > > > > (http://www.grisoft.com). > > > > Version: 6.0.320 / Virus Database: 179 - > > > > Release Date: 1/30/02 > > > > > > > > > > > > ------------------------------------------ > > > > Make your TechAssist database better! > > > > Submit Repair Tips here: http://www.tech-assist.org/secure/tip/ > > > > ------------------------------------------ > > > > To UNSUBSCRIBE your email address, click here: > > > > mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe > > > > Or send a BLANK email with unsubscribe in the > > > > SUBJECT field to the address above. > > > > > > > > > > ------------------------------------------ > > > Make your TechAssist database better! > > > Submit Repair Tips here: http://www.tech-assist.org/secure/tip/ > > > ------------------------------------------ > > > To UNSUBSCRIBE your email address, click here: > > > mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe > > > Or send a BLANK email with unsubscribe in the > > > SUBJECT field to the address above. > > > > > > > > > > ------------------------------------------ > > Make your TechAssist database better! > > Submit Repair Tips here: http://www.tech-assist.org/secure/tip/ > > ------------------------------------------ > > To UNSUBSCRIBE your email address, click here: > > mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe > > Or send a BLANK email with unsubscribe in the > > SUBJECT field to the address above. > > > > ------------------------------------------ > > Make your TechAssist database better! > > Submit Repair Tips here: http://www.tech-assist.org/secure/tip/ > > ------------------------------------------ > > To UNSUBSCRIBE your email address, click here: > > mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe > > Or send a BLANK email with unsubscribe in the > > SUBJECT field to the address above. > > ------------------------------------------ > Make your TechAssist database better! > Submit Repair Tips here: http://www.tech-assist.org/secure/tip/ > ------------------------------------------ > To UNSUBSCRIBE your email address, click here: > mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe > Or send a BLANK email with unsubscribe in the > SUBJECT field to the address above. > ------------------------------------------ Make your TechAssist database better! 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