Oscilloscope  - Page 1
Forum section: electronics / beginners

author: makjoe
author_rank: Newbie
timestamp: January 22, 2018, 02:16:34 pm
content: Hello everyone ,I just bought one analogic oscilloscope Fluke PM3370B 60MHZ so I am real hobbyest and I am very happyI have two questions : First , Is right decision recaping the PSU due to years ? and second Is enought scope probes hantek 100mhz or you recomended buy high quality brand .I expect it use to check and build power supply audio and general audio design.Regards

author: danadak
author_rank: Super Contributor
timestamp: January 22, 2018, 02:31:05 pm
content: I recap on failure, most of the time. Some scopes I have back to late 1940's caps still good,even the electrolytics (although I have not actually measured their performance). Decisiondepends on equipment. I have recapped from get go SW receivers because of a history ofcap failure.You should be OK with Hantek probes you mentioned.It does not hurt to check the scope alignment if you have the gear to do it. I also cleanswitches and any socketed parts lift them slightly and press back into sockets. In Tek scopesthey had transistors in PCB/solder thru hole connections, I move them a bit to break anyoxidation. Be careful of HV, make sure you discharge all caps and CRT before you do anyof this work.http://www.crtsolutions.com/CRTSafety.pdfRegards, Dana.

author: makjoe
author_rank: Newbie
timestamp: January 22, 2018, 02:52:59 pm
content: Ok Dana , I will try to check it like you said me .Thank you so much

author: Old Printer
author_rank: Frequent Contributor
timestamp: January 22, 2018, 03:14:37 pm
content: Congrats on your new scope, looks like a nice one. User groups and forums are a good source of info on a question like this as often that info is particular to the make and model/age. For older analog scope I have stuck to TEK primary because manuals are easily obtainable and there are lots of people rebuilding them to ask questions of. I am curious if Fluke made their own scopes or had someone else manufacture them.

author: makjoe
author_rank: Newbie
timestamp: January 22, 2018, 04:22:13 pm
content: Hi Old Printer,, ThanksI dont know if Fluke made it but there is several version of Philips with the same aspect . I have found the service manual , software and user manual ,so happy .You know , to audio maybe need 1 mhz and I have 60 Mhz , plus 200Ms/s sample rate , its more than enought to me.Regards

author: cowasaki
author_rank: Frequent Contributor
timestamp: January 22, 2018, 08:26:20 pm
content: I used a similar scope to that in my first electronics job but the 100MHz version. Nice scope and very usable.

author: Old Printer
author_rank: Frequent Contributor
timestamp: January 22, 2018, 08:38:45 pm
content: A poke around ebay shows several listed as Fluke with Phillips badges on them and "Fluke" nowhere to be seen.but I have never really looked at either brand. That said, Phillips is a very respected name and from what I hear, I would take a nice one in a second.

author: PA4TIM
author_rank: Super Contributor
timestamp: January 22, 2018, 10:39:46 pm
content: Fluke bought the Philips T&M division. I had here a Phlukescope with both Philips and Fluke logo's See:http://schneiderelectronicsrepair.nl/?p=527I'm not a recap fan. Most of my gear still has the original caps.

author: makjoe
author_rank: Newbie
timestamp: January 23, 2018, 08:55:50 am
content: Hi , PA4TIMThanks for the info , I will try to search Philips into the unit73 EA1HXW..

author: makjoe
author_rank: Newbie
timestamp: January 29, 2018, 08:38:15 pm
content: Hi , I opened the scope and all chips are Philips,,,capacitors has perfect values in power supply and branded United Chemi Con.

author: james_s
author_rank: Super Contributor
timestamp: January 29, 2018, 09:45:23 pm
content: If it works fine then just leave it alone. There is some risk of causing damage when re-capping so the old saying applies "If it ain't broke, don't fix it."

author: JacquesBBB
author_rank: Frequent Contributor
timestamp: January 29, 2018, 11:12:43 pm
content: Check the voltage and ripple of the power supply. If everythin is fine, just leave it.Otherwis, some caps may be sik.