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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: 136kHz station components CNY17 |
| From: | "Hans-Albrecht Haffa" <[email protected]> |
| Date: | Thu, 15 Apr 2004 21:38:31 +0200 |
| Organization: | http://freemail.web.de/ |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
Dear Dick,
just build an schmit-trigger by Yourself. Take +5V Voltage for the phototransistor, and use a schmitt-Trigger-Nand 4093 after the optocoupler. Because of the hazard of fire and destruction of Your experimental equipment, please buy a Dummy Load for 1 kW. Buy a noisy KAM1300 (from DDR) ore try to get a huge wet attenuator . I bought one at HAM-RADIO (Rohde und Schwarz, 1 kW, output -40 dB, Z=60R, filled with "oleum paraffinium") for DM 250,-- (EU125,--) incl. transport home to me.
55, Hans-Albrecht, DK 8 ND
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Von: [email protected]
Gesendet: 14.04.04 23:49:19
An: "Hans-Albrecht Haffa"
First off all thanks to Jeff for delivering the adress of an distributor in the Netherlands. Unfortunatly they only deliver to firm's and not to individuals....... Meanwhile I offered some of the difficult parts by them via an relative who runs his own firm...... So, James thanks for your offering as well; I'll keep that in mind as a back up in case my ordering turns out to a negative. Thanks also to Hans-Albrecht for the tips on cores, I'll save that information, just in case..... On comment on your mail Hans-Albrecht, you said you using the CNY17 or other opto-couplers, but the one used in David's design is one with a Schmitt-trigger built in, and I do not know if that can be replaced by a normal standard one. I started to build the 1000 Watt adjustable dummyload for my power supply......... It certainly turns out to be a large time-consuming project, this 136kHz station prepairing. A lot off other stuff needed to test the several parts has to be made, hihi. Well, now go to bed....... 73! Dick, pa4vhf
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