SM-2400 Frequency Counter Schematic needed or information needed.

[Robert Groh]

I am trying to get a SM-2400 frequency counter up and running and step 1 is to figure out what type of dc supply it needs.  The SM-2400 is a small handheld 0 to 500 MHz frequency counter and normally uses either an internal supply of 5 ni-cd batteries or an external power supply. My unit does not have the internal batteries at all - it only has a plug for an external ps.  No idea of what that should be although I strongly suspect it should be 5 * 1.2V or 6 VDC.  But if so, there must be an internal regulator as I suspect most of the ICs are +5V stuff.  

But I don't know.  So before blowing it up for sure with the wrong PS, I thought I would check first.

I may have asked this before so, if I did, let me apologize!  I will continue looking.

Thanks very much to all.

73
Bob Groh, WA2CKY

-----------------------------------------------------------
Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.aspx?list=HEATH
To post - HEATH at LISTS.TEMPE.GOV
Archives - http://lists.tempe.gov/archives/HEATH.html