Re: LF: 136kHz station components CNY17

["Hans-Albrecht Haffa" <dk8nd@web.de>]

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:      rsgb_lf_group@blacksheep.org
Gesendet: 14.04.04 23:49:19
An:       "Hans-Albrecht Haffa"

Betreff: Re: LF: 136kHz station components

... and the winner is... WEB.DE FreeMail! - Deutschlands beste E-Mail  
ist zum 39. Mal Testsieger (PC Praxis 03/04) http://f.web.de/?mc=021191  

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Von:	rsgb_lf_group@blacksheep.org
Gesendet:	14.04.04 23:49:19
An:	"Hans-Albrecht Haffa" <dk8nd@web.de>
Betreff:	Re: LF: 136kHz station components

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