On Tue, 15 Mar 2005 18:45:33 +0100, "Fam J.Hoekstra"
wrote:

WhAT ABOUT A HEF4060?
"Tim Shoppa" schreef in bericht
oups.com...
pump it into a flip flop, but I'm having an awful time using
2n3904 transistors. The triggering seems to be a very
challenging design issue.

You built the divider out of discrete transistors and steering diodes?
Running this sort of divider at 7 MHz will be marginal... some "speedup
caps" in parallel with the base drive resistors may help.

or other ideas for halving frequency?

74HC74.

Tim.



you are asking difficult questions, not everybody over there know
Philips devices, but they usually go twice as high as other standard
devices, so it might work - provided you have it

LA8AK
---
J. M. Noeding, LA8AK, N-4623 Kristiansand
http://home.online.no/~la8ak/c.htm

Also, don't forget the 74AC74.............these are good up to 100MHz.

Pete

"J M Noeding" wrote in message
...
On Tue, 15 Mar 2005 18:45:33 +0100, "Fam J.Hoekstra"
wrote:

WhAT ABOUT A HEF4060?
"Tim Shoppa" schreef in bericht
roups.com...
pump it into a flip flop, but I'm having an awful time using
2n3904 transistors. The triggering seems to be a very
challenging design issue.

You built the divider out of discrete transistors and steering diodes?
Running this sort of divider at 7 MHz will be marginal... some "speedup
caps" in parallel with the base drive resistors may help.

or other ideas for halving frequency?

74HC74.

Tim.



you are asking difficult questions, not everybody over there know
Philips devices, but they usually go twice as high as other standard
devices, so it might work - provided you have it

LA8AK
---
J. M. Noeding, LA8AK, N-4623 Kristiansand
http://home.online.no/~la8ak/c.htm