GENERATOR- YOU DO THE IN/OUT POWER MATH

[DeepCut]

Thanks Mark.

[DeepCut]

I'm looking for one that's good enough to observe the spikes from the Bedini circuit, will the cheapy i'm looking at be fast enough to spot them ? Or would a spike like that blow the scope ?


p.s. the 2090 looks nice


Gary.

[gyulasun]

Hi,

For the probes this would seem acceptable (you get two identical probes)
http://www.virtualvillage.co.uk/2-x-60mhz-oscilloscope-clip-probes-rods-tips-testing-001482-003.html

For the scope, cannot you wait and save some more to get a higher bandwidth scope?  I say this because here is some spec on it:

Measurable frequency: 0Hz -----3kHz
Adjustable range of time domain: 10 mS/DIV----10800 S/DIV

I can only think from these specifications that this PC scope has a bandwitdth of a few kiloHerz only? Sounds very very small ...  almost useless for an avarege tinkerer...  If you build a Joule thief and it happens to run at ,suppose, 30-40kHz, you would not be able to see the pulses with this scope. 
You would need a scope with a bandwidth of at least 10MegaHertz, also dual channel.  I know it would cost more but why would you buy something with very limited features and later when you have it already you experience the limits and start collecting for a better one...

I have found this on UK ebay:
http://cgi.ebay.co.uk/GOULD-405-Digital-Storage-Oscilloscope-100Ms-s-20MHz-/160442464615?cmd=ViewItem&pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item255b1db967   comes with two probes included! It is in Bristol and costs 50 Pounds, slightly used condition.


Here is another used scope but working and its bidding price starts from 1 Pound:
http://cgi.ebay.co.uk/Hewlett-Packard-54200A-Digital-Storage-Oscilloscope-/400127006941?cmd=ViewItem&pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item5d296d98dd

Just look around some more if none of the above courts you...    If you could grab the HP54200A for £1.00 and could personally collect it, it would be worth buying because if it gets wrong later in time you lost £1.00 + petrol if you collected it personally, otherwise the postage. With this you need the two probes I referred above.

Edit: you can find some more info on this: http://www.valuetronics.com/Details.aspx?Model=Agilent%20HP_54200A&ProdID=6543

rgds,  Gyula

[DeepCut]

Great links ! (and advice).

Thanks Gyula

[DeepCut]

I'm looking at these DSO 2090/2150 ones on ebay and elsewhere.

What if you got a large voltage spike on a USB scope, would it fry the box ?

I ahven't a clue how probes work and am assuming they're like multimeter probes ?


Gary.