In , "Harry \(SM0VPO\)"
wrote:

Hi all,
I am having a spot of bother with prescaler chips. Basically I need to find
one at the right price and availability. US$5 each is reasonable, but where
from? Is there one available that is not obsolete?

I live in Sweden and my local component shop is ELFA (Swedens answer to RS).
They don't sell ANY digital divider that operates above 50MHz, except for
the 74F163 and I cannot come up with a reliable interface circuit to couple
an oscillator into it at over 100MHz.

I found the MB501 (MC12022, SP8704) but it is obsolete and cannot find a
reliable source. I bought a couple, but that source dried up. All I need is
a divider chip that will accept a small signal up to 150MHz, is available,
cheap(ish) and will divide down to under 10MHz so that I can use CMOS to
process a synthesiser. A parallel-load synthesiser chip with in-built 150MHz
prescaler would do.

I have used "Teleport" to download over 50,000 pdf datasheets without any
luck. I have gone through most of them, but it takes a fair bit of time. If
anyone has a helpful suggestion I would appreciate it.

BR from Harry - SM0VPO

http://w1.859.telia.com/~u85920178/
harryvpo (at) hotmail (dot) com


Man, if THIS ain't a trip -- a well-known, over-rated internet homebrew tech
asking for help for a simple prescaler. Hey Harry, don't you know that the basic
freshman-lab-grade Class B or C amplifier is nothing more than a divide-by-2
counter? If you have a bunch of 2N2222's, 2N2907's, or any transistor with an Ft
above your high-freq limit, you have a divide-by-(n x 2) counter. Any advanced
homebrewer should know that stuff cause it's basic theory.

And for you to post such a question in alt.radio.pirate.... that's pretty
pathetic, Harry.




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