Oscilloscope

[golfnut]

I just got a Hameg 2CH 20MHz for £75

Not bad..


I miss the storage and the delayed timebase though.

S

[satdaveuk]

I still use the Calpro does the job its like apart of me, know it inside out even though its dated its still accurate, and you need to bare in mind modern is not always better, had mine since the early 80s, before that had a old valve one for years, it seen me through serving my time in the TV industrie and although the new ones are in colour there not telling you anymore just easer on the eyes.

Of course correct me if im wrong
Its scary ive had that since 1982 just worked it out

Regards

[satdaveuk]

Theres mine, nothing fancy but never let me down apart from a capacitor gone leaky a couple of years ago.

[Qiaozhi]

Theres mine, nothing fancy but never let me down apart from a capacitor gone leaky a couple of years ago.

A Scopex 4D 10 is exactly the same unit. I own one, but haven't used it for a long time. By the way, I have the user manual and schematic somewhere if you ever need it. Until recently I was using a Gould OS 300, but now have a GwInstek GDS-1022 digital storage scope. The Gould is good, but the GwInstek has the ability to display several useful measurements, and store images and waveforms on an SD card. Apparently it can also be connected directly a PC, but I haven't played with that function just yet.

I will be putting the Scopex and Gould scopes up for sale in the near future.

[simonbaker]

I still use the Calpro does the job its like apart of me, know it inside out even though its dated its still accurate, and you need to bare in mind modern is not always better, had mine since the early 80s, before that had a old valve one for years, it seen me through serving my time in the TV industrie and although the new ones are in colour there not telling you anymore just easer on the eyes.

Of course correct me if im wrong
Its scary ive had that since 1982 just worked it out

Regards

I think my Tektronix 465 "portable" scope is almost a decade older than that. I can hardly lift the thing, even though it was compact for its day! I'm amazed the capacitors haven't completely dried out and failed at this point (knock on wood). It will have trouble on hot days where the temperature is in the 90s.

I'd sure like a light handy portable unit though, especially for testing MDs in the field. Since we are interested in noise measurements involving long-time sampling, something like DennisTheMennis's USB scope together with a little netbook computer might be the most useful solution.

-SB

[Halo]

Looks like they dropped the price on the DS1052E 50 MHz Digital Oscilloscope.
http://www.rigolna.com/products/digi...1000e/ds1052e/

$329 but after you add it to the cart there's a little 6 question survey (most answers are "all of the above") that gives you another $30 off coupon.
$299 + $15 shipping is a great deal for that scope.
It's also unlockable to 100Mhz if you want to tinker.

[Geo]

A Scopex 4D 10 is exactly the same unit. I own one, but haven't used it for a long time. By the way, I have the user manual and schematic somewhere if you ever need it. Until recently I was using a Gould OS 300, but now have a GwInstek GDS-1022 digital storage scope. The Gould is good, but the GwInstek has the ability to display several useful measurements, and store images and waveforms on an SD card. Apparently it can also be connected directly a PC, but I haven't played with that function just yet.

I will be putting the Scopex and Gould scopes up for sale in the near future.

I also have a Gould OS300 and i don't replay it with any other.
I don't like digital scopes , analog have better resolution. Waveforms at digital scopes remind me old games at Atari etc....


Regards

[Qiaozhi]

I also have a Gould OS300 and i don't replay it with any other.
I don't like digital scopes , analog have better resolution. Waveforms at digital scopes remind me old games at Atari etc....


Regards

Yes - I agree, and I'm a little reluctant to sell the Gould. However, once you get used to the storage and the measurement capability of the digital scope, you never want to go back. I guess it's what you're used to.

Here's the one I bought ->
http://www.sjelectronics.co.uk/acata...Buy-Offer.html

The Rigol scopes are more expensive here in the UK. At first I thought the Rigol was cheaper, but then noticed the price did not include taxes and shipping.

[Geo]

Yes - I agree, and I'm a little reluctant to sell the Gould. However, once you get used to the storage and the measurement capability of the digital scope, you never want to go back. I guess it's what you're used to.

Here's the one I bought ->
http://www.sjelectronics.co.uk/acata...Buy-Offer.html

The Rigol scopes are more expensive here in the UK. At first I thought the Rigol was cheaper, but then noticed the price did not include taxes and shipping.

Maybe it's time to buy one, but last months the economics at Greece are very bad. For the moment i stay with the old but good OS 300.

[Plexity 25]

I bought my Rigol from MCS Test Equipment in the UK for a good price and it's nice to have local support.


I've also got a couple of old Tek scopes. CRT's have gone out on a few and I've had trouble getting a replacement CRT. Anybody else have this problem?

[ApBerg]

Yes - I agree, and I'm a little reluctant to sell the Gould. However, once you get used to the storage and the measurement capability of the digital scope, you never want to go back. I guess it's what you're used to.

Here's the one I bought ->
http://www.sjelectronics.co.uk/acata...Buy-Offer.html

The Rigol scopes are more expensive here in the UK. At first I thought the Rigol was cheaper, but then noticed the price did not include taxes and shipping.

Nice one .... now 5 are even cheaper....!

I do not want to remember the price from my old scope .. when it was new...

[apaulsalerno]

new scope(s)

I figured if I am going to ever really figure out how these things work I will need at least a decent old scope and possibly a new digital one.

I got a 20 MHz Kikusui COS5020TM for 65 bucks off ebay and I got lucky and found a pair of Tektronix P6008 probes for 20 bucks to go with it.

I'm looking at the Owon PDS5022S DSO with a 7.8 inch LCD. They are under 300 dollars, even as low as 250.00 on ebay.

http://www.ebay.com/itm/280832985781...84.m1423.l2649

I think the analog's have their merits, for a hundred dollars or less its a no-brainer, something you gotta have. I think that if I get the Owon DSO or a Rigol and a cheap LC meter I will be set up pretty good. Ive got some old Kaman eddy current sensors and one of their meters (for measuring distance to a metal target). I will play around with the Kaman and one of my Soveriegn's to learn a little about how this technology works before I try building anything.

[mindfree]

Will this be a good oscilloscope for building metal detector ?
http://www.ebay.com/itm/NEW-OSCILLOS...item2574cd9170

Has anyone used a PC usb-based scope ? Are they worth buying ?

http://www.ebay.com/itm/PC-USB-Based...item19d6208692

thanks!

[Qiaozhi]

Will this be a good oscilloscope for building metal detector ?
http://www.ebay.com/itm/NEW-OSCILLOS...item2574cd9170

Has anyone used a PC usb-based scope ? Are they worth buying ?

http://www.ebay.com/itm/PC-USB-Based...item19d6208692

thanks!

A 20MHz 2-channel scope is more than adequate for building a metal detector.
If you can get a digital storage scope, this makes it easier to capture certain waveforms, and to save the results for your log book and/or for posting on Geotech.

Have a look on the Farnell / Element 14 website.

[ODM]

Newer digital scopes likely have rather high actual sampling rates. Some older digital scopes had problems with aliasing or distortion due to low sample rates and steep nyquist filters. Going with an old Tek or HP is a good bet if you can find one for reasonable prices, and there are still some spare parts and even service available. New DSO are cheaper and cheaper with the chinese double production of Agilent(hp) and other makes...

There are also tempting ways to make your 40 meg scope to a 100 meg scope.. Software updates to enhance sample rate may degrade functionality, because most manufacturers of high speed ADC don't really have product lines separate for fast and slow versions of an ADC, they will just label the ones that are OK but don't pass the high speed test as the slow ones. Running them at higher speeds may increase distortion, temp sensitivity, and degrade accuracy. If you don't need the marginally higher speed, it can be better to leave it alone.