[OBTAINED] Analog oscilloscope wanted under $100, 10+ MHz BW. - Page 1
Forum section: electronics / general

author: DJKA
author_rank: Contributor
timestamp: May 11, 2012, 06:20:38 am
content: Hi, I am looking for an used but working oscilloscope, I am EE beginner. Dual trace one would be PERFECT!Does anyone have to give away or sell for less than $100? My budget is really tight.Thank you!--Kaz,Lithuania, EU

author: firewalker
author_rank: Super Contributor
timestamp: May 11, 2012, 11:58:02 pm
content: For you budget I think you should have a look locally. AAlso eday.de/ebay.uk has some cheap Hameg CROs. E.g:http://www.ebay.de/itm/HAMEG-2-KANAL-20MHz-40Mhz-OSZILLOSKOP-HM-203-5-NEUE-SONDE-0-60Mhz-/251053658549?pt=Mess_Pr%C3%BCftechnik&hash=item3a73f6d1b5Alexander.

author: AtomicDog
author_rank: Newbie
timestamp: May 12, 2012, 12:14:13 pm
content: Are there hamfest in your part of the world? If so I would start there.

author: vk6zgo
author_rank: Super Contributor
timestamp: May 12, 2012, 12:22:53 pm
content: The old Soviet military forces got rid of a lot of stuff when the USSR folded.Some may still be around in your country,tucked away in someones back shed,or in an ordinary junk shop!The hard bit may be finding out the specs of some of the old stuff,unless you can find a veteran who has used it.

author: nctnico
author_rank: Super Contributor
timestamp: May 12, 2012, 03:21:21 pm
content: The USSR folded about 20 years ago. So whatever was leftover is complete junk by now. I think the OP has a better chance looking at local hamfests and second hand websites.

author: vk6zgo
author_rank: Super Contributor
timestamp: May 13, 2012, 02:39:50 am
content: I Googled,& found a lot of people have old Soviet 'scopes still up & running,a lot more than I thought would be around.Most of them aren't military though,apparently the USSR exported them,mainly,but not only, to the old WarsawPact countries.The ones I saw videos of seem quite nice units,maybe not Tektronix level,but certainly that of the later Telequipment stuff,or,dare I say it?---Philips!My Tek 7613 & BWD 509 are both around 30 years old!The BWD has a triggering problem,but otherwise works.The main reason I suggested ex-military stuff is that it would be probably made to a higher level of reliability,though perhaps not performance.He is more likely to find this kind of equipment at hamfests,as they would have been used in his country in the old days.

author: Neganur
author_rank: Unknown
timestamp: May 13, 2012, 11:53:10 am
content: Hey, I bought some new scopes recently and have no more use for my old one.It's an OS-5020 from the company LG (there seem to be identical ones out there from EZ Digital).The specs are:20 MHz 6" CRT1 Mohm 30 pF2-Ch dual trancehorizontal: 0.2 s ... .2 us in 1-2-5 stepsvertical: 5 mV/div ... 20 V/div vertical sensitivity (can get down to 1 mV/div ... 1V/div with the 5 x amplifier switch)rear connectors: Z-axis input and Ch1 output10 x sweep magnificationX-Y mode,link to the manualForgot the dimensions (60 x 60 x 30 cm I guess) of the box but it's fairly light (8 kg or so)50 EUR + shipping?

author: SeanB
author_rank: Super Contributor
timestamp: May 13, 2012, 01:19:52 pm
content: How much for shipping to ZA? I do not do Paypal, but can do a bank cheque to Finland.

author: DJKA
author_rank: Contributor
timestamp: May 15, 2012, 12:11:43 pm
content: Hi!Damn it! I've missed this one!Well, I've never had a success getting a cheap scope from eBay(under $100 inc. shipping), but thanks anyway!Have to be more keen on that!Quote from: firewalker on May 11, 2012, 11:58:02 pm

author: DJKA
author_rank: Contributor
timestamp: May 15, 2012, 12:19:37 pm
content: Hi, this one looks fine, I reckon it's a good choice for me as for starter... Price is also OK, I am just curious about shipping cost.Also, do you have probes included, if so what are the specs of those?Quote from: Neganur on May 13, 2012, 11:53:10 am

author: nctnico
author_rank: Super Contributor
timestamp: May 15, 2012, 12:54:07 pm
content: The Hameg sounds crappy. The seller says the pots are bad. You probably missed a box of griefHow about this?http://www.dealextreme.com/p/h301-portable-48mhz-usb-digital-oscilloscope-82005?item=56You seem to have a computer...

author: Neganur
author_rank: Unknown
timestamp: May 15, 2012, 02:44:37 pm
content: Sent you an email. Shipping is 25 EUR as 10 kg international priority parcel (http://www.posti.fi/english/pricesandinstructions/)I may have two TT-LF 312 probes somewhere, they're neither new nor special and I may not be able to find the probe hooks anymore. Specs are: 15 MHz(1x)/150 MHz(10x), switchable 10x/1x with 10...60 pF compensation range (http://www.testec.de/DL/TT/MA/LF312_EN.PDF).

author: Neganur
author_rank: Unknown
timestamp: May 15, 2012, 02:49:38 pm
content: Quote from: nctnico on May 15, 2012, 12:54:07 pmHow can they claim 48 MHz bandwidth while the sampling rate is 48 MHz?

author: vk6zgo
author_rank: Super Contributor
timestamp: May 15, 2012, 02:53:00 pm
content: Quote from: Neganur on May 15, 2012, 02:49:38 pmQuite easy,they lie!

author: nctnico
author_rank: Super Contributor
timestamp: May 15, 2012, 03:59:44 pm
content: Quote from: Neganur on May 15, 2012, 02:49:38 pmThey can use equivalent time sampling which means a repetitive signal is sampled multiple times. Most of the older scopes that go up to many GHz have ADCs that sample at frequencies like 200kHz.

author: Neganur
author_rank: Unknown
timestamp: May 15, 2012, 04:26:44 pm
content: Fair enough. I thought they meant single shot.

author: T4P
author_rank: Super Contributor
timestamp: May 15, 2012, 04:55:58 pm
content: But at that level of operation it is only as good as a analog... On a device that must be coupled to a notebook, still smaller then a 100megger analog