"Hans-Albrecht Haffa" <[email protected]> schrieb am 26.04.05 11:12:31:
Dear Andre,
thank You for the hint.
In the meantime I hav found, that the IC 4017 has an aux-Bit output. For the figures o...4 it is log. H, for the figures 5...9 it is log. L. it may be that we can use (abuse) this output as a symmetrical output (duty cycle D=0,5) for this purpuse. See at
Philips Semiconductors,
HEF4017B, Pin 12 (pin-name O5-9\ that is O_sub 5 to 9 inverted)
55, Hans-Albrecht
DK 8 ND
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Gesendet: 24.04.05 14:45:11
An: "Hans-Albrecht Haffa" <[email protected]>
Betreff: Re: LF: Divider by 10 or 100 for 136k out
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Hans-Albrecht Haffa wrote:
Dear Lowfers, my problem is: I ave a little break through at qrss operation in receive mode when driving my amplifier directy with 136 kHz signal out of the dds-VFO. It would be useful to use a feeder before the amp that is keyed. What IC I can use that will give me a duty cycle of 50 %?. For reference: Books G3XDV "LF today" and G3LDO "the LOW FREQUENCY EXPERIMENTERS handbook " are present. HEF4017 to divide by 5 and 4013 to divide by 2 ? Waiting for Your suggtestions, Hans-Albrecht DK 8 ND __________________________________________________________ Mit WEB.DE FreePhone mit hoechster Qualitaet ab 0 Ct./Min. weltweit telefonieren! http://freephone.web.de/?mc=021201 the 7490 (and the 74LS90) etc, contains a divider by 5 and a divider by 2
73
André N4ICK
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