Looking for a analog oscilloscope prefered 50mhz dual channel - Page 1
Forum section: electronics / general

author: shims506
author_rank: Contributor
timestamp: December 28, 2011, 06:51:12 am
content: I'm starting out a little electronics lab and would like to get more equipment but have limited funds. If some one has one and has no use for one i will be willing to pay for the oscilloscope, if your feeling generous i can accept it as a giftLocation:United States Illinois, ChicagoIf this isn't the place to look for such an oscilloscope I have searched my fair share on craigslist locally and no luck finding a working one, please direct me to someone that will help me find one.

author: shims506
author_rank: Contributor
timestamp: December 28, 2011, 06:52:26 am
content: Oops just realized posted in wrong section i apologize, could a moderator please move this post or delete it so it could be in it's correct section.

author: joelby
author_rank: Frequent Contributor
timestamp: December 28, 2011, 06:53:01 am
content: So, where in the world are you located?

author: shims506
author_rank: Contributor
timestamp: December 28, 2011, 06:56:47 am
content: Quote from: joelby on December 28, 2011, 06:53:01 amUnited states

author: EEVblog
author_rank: Unknown
timestamp: December 28, 2011, 11:47:27 am
content: Ebay ones within 200 miles of Chicago:http://www.ebay.com/sch/i.html?LH_ItemCondition=12&LH_PrefLoc=1&LH_Distance=60601..200&_nkw=oscilloscope&_dmpt=BI_Oscilloscopes&_fln=1&_trksid=p3286.c0.m283&_sadis=200&_fpos=60601&_fspt=1What is your budget?This BK Precision might go cheap:http://www.ebay.com/itm/BK-Precision-2120B-Dual-trace-oscilliscope-/330662383605?pt=BI_Oscilloscopes&hash=item4cfd038ff5#ht_500wt_1287Dave.

author: shims506
author_rank: Contributor
timestamp: December 28, 2011, 05:24:19 pm
content: I am in the ballpark between $100-$150 but may add more if the unit is worth the price. My concern for the ebay products are that they are sold as is and are not tested for the most part, and am worried about calibration and not working properly.Is there a document or video explaining how to properly diagnose and fix the issues, i have seen the EEVblog youtube video on checking the oscilloscope but it doesn't go in depth on if this broke on oscilloscope this is what you have to do kinda thing.

author: Unknown
author_rank: Unknown
timestamp: December 28, 2011, 05:56:27 pm
content: Tektronix has a 'Troubleshooting your oscilloscope' document, it should be easy to find as a PDF. The top brands (eg. Tektronix, HP) also produce extensive service manuals that often contain procedures to check for correct operation.A tested product with warranty is going to be more expensive than 'as is, no returns, don't know how to test'.

author: shims506
author_rank: Contributor
timestamp: December 29, 2011, 01:22:01 am
content: Quote from: alm on December 28, 2011, 05:56:27 pmIn your opinion could beginner like myself be able to fix it? Or assistance may be needed?Another question are replacement parts widely accessible?

author: Unknown
author_rank: Unknown
timestamp: December 29, 2011, 02:47:48 am
content: You frequently need a working scope to fix a scope, so I wouldn't buy a parts/repair scope as first scope.Availability of replacement parts depends on the age. The more recent scopes tend to have more custom parts. Tektronix and HP tend to use a fair number of custom parts (both electronic and mechanical), but the large community means that there is often a supply of parts available. Both have Yahoo! groups dedicated to maintaining and fixing the equipment.

author: shims506
author_rank: Contributor
timestamp: December 29, 2011, 04:05:33 am
content: I appreciate the advice and will purchase the oscilloscope Dave posted previously and probably buy broken ones to play with later.I really appreciate how fast people reply and have good feedbackThank you and am looking forward being more involved on the forum.

author: EEVblog
author_rank: Unknown
timestamp: December 29, 2011, 06:32:51 am
content: Quote from: shims506 on December 28, 2011, 05:24:19 pmThat is not easy, as every scope, whilst having the same basic overall operating principle, will have entirely different circuitry and/or custom parts, and different calibration and adjustment requirements etcMake sure you get one that has a service manual available if you are concerned with this.Dave.

author: hacklordsniper
author_rank: Frequent Contributor
timestamp: December 29, 2011, 08:02:09 am
content: I could reccomend a new Hameg HM400, its not expensive and a great scope for which you can get all documentation and parts from Hameg since its not so old. However all parts are SMD and it features a FPGA and few other programable devices under the case so it will not be easy to repair like older scopes if something fails