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1. [WriteLog] CW PTT troubles (score: 1): Author: ik2ncj@galactica.it (Luca IK2NCJ); Date: Thu, 14 Nov 2002 09:16:49 +0100; Dear friends, after I discovered that WL running under XP and 98 SE on Acer laptop = won't switch radio from RX to TX from LPT1 port, I thought that using an = older laptop with a DB9 COM port I can; /archives//html/WriteLog/2002-11/msg00274.html (7,292 bytes)
2. [WriteLog] CW PTT troubles (score: 1): Author: dl6jz@t-online.de (dl6jz@t-online.de); Date: Thu, 14 Nov 2002 15:34:35 +0100 (CET); Hi Luca, your description of the problem is quite short. So I am not sure that my response would meet your problem. Some weeks ago I built one LPT-interface for CW-keying and PTT-control. First I tri; /archives//html/WriteLog/2002-11/msg00275.html (8,712 bytes)
3. [WriteLog] CW PTT troubles (score: 1): Author: n1eu@hotmail.com (Barry N1EU); Date: Thu, 14 Nov 2002 11:14:20 -0500; Not to ask the obvious, but if you're using a modern rig, why not use break-in and just let the keying line switch rx to xmit ? 73, Barry N1EU www.albany.net/~bg _____________________________________; /archives//html/WriteLog/2002-11/msg00276.html (7,155 bytes)
4. [WriteLog] CW PTT troubles (score: 1): Author: jjreisert@alum.mit.edu (Jim Reisert AD1C); Date: Thu, 14 Nov 2002 20:00:34 -0500; The rig could switch before the AMP, then you're hot-switching the amp when it finally PTTs. CT prevent this by asserting PTT on an external LPT pin one baud before it sends any CW. This gives all th; /archives//html/WriteLog/2002-11/msg00277.html (7,580 bytes)
5. [WriteLog] CW PTT troubles (score: 1): Author: dl6jz@t-online.de (dl6jz@t-online.de); Date: Fri, 15 Nov 2002 09:07:57 +0100 (CET); Hi Luca, I believe the final value of the resistor in the basis-line of the transistor was about 1.2 kOhms. I soldered some long wires on the appropriate pins of the LPT-connector. So I could measure; /archives//html/WriteLog/2002-11/msg00278.html (8,634 bytes)
6. [WriteLog] CW PTT troubles (score: 1): Author: zoltan.pitman@vodafone.com (zoltan.pitman@vodafone.com); Date: Fri, 15 Nov 2002 11:20:27 +0100; If the voltage drops when your LPT output is loaded too much by the 1k + BE in series, you should add a something like a 4.7k in parallel the base. This is a common problem of new pc hardware and som; /archives//html/WriteLog/2002-11/msg00279.html (8,921 bytes)

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