Schematic for Ramsey CT-125 Frequency Counter

May 15, 2008 7 Replies

Anyone ever seen this? It's a cute little frequency counter that is supposed to go to 1.3 GHz, but only the 10 MHz and 60 MHz ranges work. The 1.3 GHz range is either non-responsive or erratic.



There's a house numbered chip, which may be the prescaler: 2-8758-229 with 274-227 below that.



Any info appreciated.



Thanks!


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I assume you've tried Ramsey?

Is this the same company that makes all the kits?

I think so, but there is nothing about this model on their Web site. I assume it's many years old, forgot to check the date codes.

I'll have to dig deeper, perhaps risk contacting them? What a concept?!

I really got it because it's small and I only need the 10 MHz range. But this is a matter of principle! :)

Thanks.

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James Sweet wrote in news:e13Xj.11700$mc1.10406@trndny08:

I took high school electronics shop with a John Ramsey,Kenmore,NY. He was making FM wireless mikes at the time.

Jim Yanik jyanik at kua.net

I have the CT-90, which only goes to 600 Mhz. Uses a different pre-scaler (11C90.) The schematic probably wouldn't do you much good. Couldn't find anything about the series on the Ramsey site. You could always contact them to see if they have something in the archives.

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Dick

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I have sent them email. No reply so far.

Thanks.

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Could always give them a call, much harder to ignore, pain in the butt though, I hate calling places :)

Once you get used to email.... :)

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