Author Topic: EEVblog #498 - How to get a $50 Oscilloscope on Ebay  (Read 62747 times)

0 Members and 1 Guest are viewing this topic.

Offline amtpdb

  • Regular Contributor
  • *
  • Posts: 53
  • Country: us
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #125 on: August 05, 2013, 01:56:28 pm »
Thanks for the response but it looks like someone else wanted it more then me! Maybe next time! Can't find anything working or not going off cheap! Wanted one to learn on! I'll keep watching.
Have a nice week ahead.
Don
 

Offline Halfdead

  • Contributor
  • Posts: 44
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #126 on: August 06, 2013, 01:18:28 am »
So it shows up and appears to be working but now the voltage divider dials are a bit wonky and distort the reading.
They probably just need a clean, as in the Hameg video.


This is what I figured as well so I removed the case and bottom and front panels to have a look around. It seems easy enough to clean them but I don't have any proper cleaners for this type of stuff.

I was having a quick browse on amazon found this, is this a good option in the US or is there something else?
 

Offline Stonent

  • Super Contributor
  • ***
  • Posts: 3824
  • Country: us
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #127 on: August 06, 2013, 04:43:00 am »
So it shows up and appears to be working but now the voltage divider dials are a bit wonky and distort the reading.
They probably just need a clean, as in the Hameg video.


This is what I figured as well so I removed the case and bottom and front panels to have a look around. It seems easy enough to clean them but I don't have any proper cleaners for this type of stuff.

I was having a quick browse on amazon found this, is this a good option in the US or is there something else?

How about this?
http://www.henkelna.com/product-search-1554.htm?nodeid=8797898604545

Your cheapest option would likely be this:  http://www.amazon.com/CRC-05103-Quick-Electronic-Cleaner/dp/B000BXOGNI/ref=sr_1_4?ie=UTF8&qid=1375728241&sr=8-4&keywords=crc+contact+cleaner

But it is listed as VOC which means it is extremely flammable, but you can get it at auto parts stores.

« Last Edit: August 06, 2013, 04:46:42 am by Stonent »
The larger the government, the smaller the citizen.
 

Offline Stonent

  • Super Contributor
  • ***
  • Posts: 3824
  • Country: us
« Last Edit: August 07, 2013, 09:49:40 am by Stonent »
The larger the government, the smaller the citizen.
 

Offline Stonent

  • Super Contributor
  • ***
  • Posts: 3824
  • Country: us
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #129 on: August 07, 2013, 09:07:52 am »
Both of those Pintek 40mhz scopes above are still at 99 cents. The auction is closing in about 45 minutes. I'd rather see them go to an EEVBlog member who wants a scope than someone outside of our gang.

They look just like the BK scopes of the same era.

Edit: Closing in 10 minutes

5 Minutes. I just hope one of us wins one or more of these.
« Last Edit: August 07, 2013, 09:48:36 am by Stonent »
The larger the government, the smaller the citizen.
 

Offline Stonent

  • Super Contributor
  • ***
  • Posts: 3824
  • Country: us
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #130 on: August 07, 2013, 09:53:01 am »
That first scope sold for $5.50! Hope it was one of you!

Second also sold for $5.50!

2 40MHZ scopes for $5.50 each! Holy crap!

The same person bought both scopes!
« Last Edit: August 07, 2013, 10:00:10 am by Stonent »
The larger the government, the smaller the citizen.
 

Offline Stonent

  • Super Contributor
  • ***
  • Posts: 3824
  • Country: us
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #131 on: August 07, 2013, 02:58:27 pm »
Please tell me one of the forum members bought one.
The larger the government, the smaller the citizen.
 

Offline mtdoc

  • Super Contributor
  • ***
  • Posts: 3574
  • Country: us
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #132 on: August 07, 2013, 04:01:32 pm »
In addition to ebay, it's worth checking local thrift stores.  I recently scored a fully funcitional 40MHz BK scope at the local Goodwill store for $9.99 - and no shipping!  >:D
 

Offline hosier

  • Newbie
  • Posts: 2
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #133 on: August 08, 2013, 01:53:15 am »
I ended up with a great deal this last weekend:
http://www.ebay.com/itm/LeCroy-9310L-Digital-Oscilloscope-In-good-Working-Condition-/141025535522?

Its a LeCroy 9310L with 300 MHz bandwidth, 100 MSa/s, and 1M points/channel with loads more features than the DSO Quad I was using previously...
Even better, I didn't have to pay shipping as we lived close enough to each other to arrange a pick-up.
As far as I can tell, everything works perfectly (except for maybe a couple knobs that seem to act a little weird, but maybe i'm just not used to them yet)
I was initially planning on getting and old lower bandwidth analog oscilloscope, but I found this and it seemed a much better deal.

The seller tells me the scope came from Commodore International ( http://en.wikipedia.org/wiki/Commodore_International ), bought by his brother at auction when the company when bankrupt ~1994. The most recent calibration sticker is from 1998.
Here is a picture of an 8MHz "square" wave from the DSO Quad: http://i.imgur.com/rdG4ysJ.jpg
 

Offline Sigmoid

  • Frequent Contributor
  • **
  • Posts: 488
  • Country: us
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #134 on: August 08, 2013, 04:28:11 am »
I've seen some 100Mhz HP 1741A's around for around $100... :)
Like this for example: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=151093209940

I wonder, how good / reliable / repairable are these? I'm a bit worried that 100Mhz ones may be finickier than the cheapo 20Mhz scopes, but it would sure come in handy for microcontroller work. :)
 

Offline Stonent

  • Super Contributor
  • ***
  • Posts: 3824
  • Country: us
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #135 on: August 09, 2013, 02:16:33 am »
My cheap scope has a calibration procedure in the manual. When the probes arrive today I might go through it.
The larger the government, the smaller the citizen.
 

Offline Stonent

  • Super Contributor
  • ***
  • Posts: 3824
  • Country: us
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #136 on: August 10, 2013, 06:28:38 am »
The JDR 2000 scope that was a clone of my Tenma scope closed at $20.
The larger the government, the smaller the citizen.
 

Offline jvdb

  • Contributor
  • Posts: 16
  • Country: us
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #137 on: August 10, 2013, 09:42:30 am »
What is a reasonable amount to pay for a working Tek 2232? Is this a decent beginner scope?
 

Offline poida_pie

  • Regular Contributor
  • *
  • Posts: 120
  • Country: au
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #138 on: August 10, 2013, 10:48:00 am »
I would not choose a Tek 2232 as a beginner scope. They seem to be expensive compared with other non-storage Tek scopes.
if this is the first and only scope you are buying, I would suggest a Rigol or other DSO and a cheap 20 MHz CRT scope
for the same kind of money.
That way you have good storage capability from the DSO and good analog display from the cheapie CRT.

If you already have a decent DSO (eg Rigol DS2072 or somesuch) and want an analog CRT based scope, maybe choose
a good, proven to be working Hitachi, Hameg, Tek, GW, local USA hobby type brand scope offered for sale in your city.
Bandwidth does not matter, you will see what you need to see.
If it does matter then maybe you need to ask a clearer question.

The cost of postage or freight can double the cost of a scope nowadays.
Tek models I like are 465 and 475 if restored and working well by someone good. Maybe the 2236 as well.




 

Offline poida_pie

  • Regular Contributor
  • *
  • Posts: 120
  • Country: au
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #139 on: August 10, 2013, 11:00:55 am »
In other news, the Tek 2245A I sold on ebay here in AUS went for $410. I offered free postage/freight to Mel/Syd/Canberra metro locations. About 50 watchers, 470 views.
The auction winner bid only once, 6 seconds before the end of the auction. There were 23 bids.
Again the winner bid only once, 12 seconds before the end when I sold the Tek 434 a week ago.

I think if you want to win the ebay auction you need to be decisive.

This is a surprise to me, I did not think I'd get $410.
ebay link for this item
http://www.ebay.com.au/itm/Tektronix-2245A-Oscilloscope-/330977568374

These posts relating to ebay sales of mine are to show how deep the demand is for a decent Tek CRO here in AUS.
I think there is a chance to make some money by bringing a few tonnes of Tek CROs over here in a shipping container and selling them one by one.
a short container cost from Los Angeles to Melbourne is about $2,400. You could pack a lot of scopes in a 20 foot container.
Plus trucking, plus packing the container, buying at US auctions, etc., etc.



 

Offline jvdb

  • Contributor
  • Posts: 16
  • Country: us
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #140 on: August 10, 2013, 11:14:30 am »
The cost of postage or freight can double the cost of a scope nowadays.

I asked specifically about the 2232 because it's one of the few listed locally (no shipping), and I could probably get for under $100. If it weren't significantly less expensive than a Rigol DS1052E, I would not even consider it.
 

Offline poida_pie

  • Regular Contributor
  • *
  • Posts: 120
  • Country: au
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #141 on: August 10, 2013, 06:37:03 pm »
Well it is good for $100 if it's working. I would see all channels work well, triggering well on all different sources. Test the storage function, etc.

 There is a bit of scratching of heads in the yahoo tekscopes group when someone
says their 22xx scope power supply is dodgy and can you all please help. They use switch mode PS and can be a bastard to debug. They can help but their forte is the earlier models with linear PS designs.

If you want to keep it for a good while, maybe consider replacing electrolytic caps where recommended by the results of a search at tekscopes group.
Anyway, that's my thoughts on the matter.


 

Offline s_lannan

  • Contributor
  • Posts: 27
  • Country: au
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #142 on: August 10, 2013, 11:54:58 pm »
Curiously I have been watching some oscilloscope auctions as of late. Just saw a tek 2245A go for $410! Also just read that other people saw it...

Only a year ago I got a tek 2465B shipped from the states for MUCH less than that. Nothing was ambiguous about its condition or working order either.

I'd say do yourself a favor and buy a step down transformer if you want to buy 2nd hand test equipment (most have 120/240 switch anyway).

I'm starting to see a theme on ebay with this stuff, allow me to give an example of "the dreamers club"
http://www.ebay.com.au/itm/121156702465

Cheers.
 

Offline amtpdb

  • Regular Contributor
  • *
  • Posts: 53
  • Country: us
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #143 on: August 12, 2013, 01:41:32 pm »
There seem to be a lot of brokers or stores out there bidding on theses! I bid on 4 of them today and at least 2 of them were purchased by the same person! I guess I will have to wait until some of the brokers who are buying these run out of money!!!!
I know- fat chance, been trying for several months now and will continue!! I just wanted one to learn on. What are some of the uses most of you are using them for? Are there any good learning videos out there on using these?
Thanks and have a nice week ahead.
Don
 

Offline madires

  • Super Contributor
  • ***
  • Posts: 4462
  • Country: de
  • A qualified hobbyist ;)
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #144 on: August 12, 2013, 09:01:01 pm »
What are some of the uses most of you are using them for? Are there any good learning videos out there on using these?

There's a nice introduction on youtube:
 
 

Offline JoannaK

  • Frequent Contributor
  • **
  • Posts: 337
  • Country: fi
    • Diytao making blog
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #145 on: August 13, 2013, 12:10:48 pm »
I think I may have found something to consider. These are not on Ebay , but avaiable at this country (so delivery is closer to 20€ and not 100 like overseas) . These are open for few days so price may increase.

Comments, opinions (I think I'll get just one.. not yet decided which one?).


- 2*25Mhz Teklab 50eur (+delivery) .. Looks a bit better,

- HP54602B (200eur) .. Working, looks ok. Kinda strange beast 150mHz badwidth 2+2 channels, smallish memory and low (20MSPS?) sample speed.

Ans then there is
- Lecroy lc574al ... (opens 400€) ... Seriously, I think it there must be some kind of caveat here?..
 

Offline amtpdb

  • Regular Contributor
  • *
  • Posts: 53
  • Country: us
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #146 on: August 13, 2013, 02:03:12 pm »
madires:
Thanks for the link. I will have to sit and watch this maybe this weekend.
Have a nice week.
Don
 

Offline Halfdead

  • Contributor
  • Posts: 44
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #147 on: August 18, 2013, 03:48:43 am »
So it shows up and appears to be working but now the voltage divider dials are a bit wonky and distort the reading.
They probably just need a clean, as in the Hameg video.


This is what I figured as well so I removed the case and bottom and front panels to have a look around. It seems easy enough to clean them but I don't have any proper cleaners for this type of stuff.

I was having a quick browse on amazon found this, is this a good option in the US or is there something else?

How about this?
http://www.henkelna.com/product-search-1554.htm?nodeid=8797898604545

Your cheapest option would likely be this:  http://www.amazon.com/CRC-05103-Quick-Electronic-Cleaner/dp/B000BXOGNI/ref=sr_1_4?ie=UTF8&qid=1375728241&sr=8-4&keywords=crc+contact+cleaner

But it is listed as VOC which means it is extremely flammable, but you can get it at auto parts stores.

I finally got the expensive cleaner from amazon.com in, tried to get in there with the buttons and move em around while spraying a bit.

A little improvement but it's still pretty dodgy. I guess I'll try another scope...
 

Offline amtpdb

  • Regular Contributor
  • *
  • Posts: 53
  • Country: us
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #148 on: August 18, 2013, 11:19:28 am »
My wife went on ebay and bought me a Tektronix 465 Dual Channel 100Mhz.
What probes should I purchase? I am just going to use it to learn and as a hobby?
Thanks
     
 

Offline dfmischler

  • Frequent Contributor
  • **
  • Posts: 548
  • Country: us
Re: EEVblog #498 - How to get a $50 Oscilloscope on Ebay
« Reply #149 on: August 18, 2013, 11:34:23 am »
My wife went on ebay and bought me a Tektronix 465 Dual Channel 100Mhz.
What probes should I purchase? I am just going to use it to learn and as a hobby?

The cheap ebay 100 MHz probes are plenty good enough to start.  Sighted for as low as $10 per pair delivered.

 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf