Oscilloscope Inverter for Car Battery Operation!

osciloscopio china coche

Hi!

I have a Philips PM3207 dual 15 Mc/s analogue oscilloscope which I would like to adapt for car-battery operation.

Where can I find details of:-

a) An invertor to step-up the car battery supply to give

i) -2000V, +200V & 6.3V (isolated to 3kV) for the CRT/deflection supplies

b) An inverse converter to give -24V 1A for the preamplifier

If anyone can point me in the direction of transformer details (I'm thinking of ETD39 core or similar), Primary details for +12 TO 15v Supply, formulae & suitable application/design notes I'd be very grateful!

These modern LCD thingys are way out of my price range I'm afraid!

Many thanks,

Chris Williams

inverter 2000v

I don't think so that this Oscilloscope wont have input supply of 220V or 110V. Because I have seen the oscillscope with only these input voltages. other than the pam one that are operated on batteries as well. If it is so, then why you need 2000V or 200 or 6.3V. My suggestion is that build an inverter (preferably Sine wave) for 220V or 110V, what ever its input supply is and let its internal circuit do the rest of job. (I am sorry If I could not understand what you are upto)

0siloscopi for car

Hi!

I've already tried a ready-made convertor and the mains transformer in the scope doesn't like it - it gets much too hot!!!

I would much rather remove the original mains transformer and rectifier circuits and replace them with a +12V DC Input SMPSU driving a high-frequency SMPSU transformer giving +18V 1A, -24V 1A, 6.3V (a.c. or d.c., 3kV insulated) for the CRT heater and -2000V EHT from a HT secondary (I can double/triple a lower voltage if needed) - I am looking for transformer design notes/equations for this & suggested application notes for 12V input SMPSUs!

It is ***NOT*** necessary to retain the original mains operation - I'm wanting to convert it to a completely portable instrument independent of a.c. for car diagnostic work!

Chris Williams

operation for car batteries

I still cannot follow you. I am sorry.

Anyway if you need SMPS design, I can give you the sites which helps you to design SMPS and its magnetics. (or you can google)

https://www.smps.us/magnetics.html

The following site also contains the design notes for magnetics etc.

**broken link removed**

OR you can see one circuit at the end at

and modify it for your requirement.
ENJOY!