[Trlog] CW keying on Toshiba

Philipp phil.loretz at bluewin.ch
Sat Apr 16 11:13:41 EDT 2005

Thank you Mirko

You were right, the interface I used had an optocoupler. Now we have tried
an LPT interface with a plain transistor.
Keying now okay.

73 Phil, HB9FMU

Am 16.4.2005 11:22 Uhr schrieb "Mirko Sibilja" unter <s57ad at amis.net>:

> It is known laptop problem, due to low voltages... I got LPT interface with
> two 4N32 optocouplers which works excellently on desktop PC but wont key
> transmitter on laptop. LPT interface with two plain transistors works OK,
> tho'!
> 73!  Mirko, S57AD
> ----- Original Message -----
> From: "Philipp" <phil.loretz at bluewin.ch>
> To: <trlog at contesting.com>
> Sent: Friday, April 15, 2005 9:46 PM
> Subject: [Trlog] CW keying on Toshiba
>> Hi all
>> I am trying to set up a Toshiba laptop 300 CDS for the Helvetia Contest.
>> TR is running but it doesn't key the transceiver.
>> I have chosen the parallel port and the cfg is okay.
>> The same interface works okay with my other laptop Compaq.
>> First I thought the parallel port is broken, but I can use my printer
> using
>> the same port without any problems.
>> Is there a known Toshiba problem?
>> If yes, how can I fix it?
>> There aren't any other Pcs left in my shack running Windows 98...
>> 73 Phil, HB9FMU
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