To: | <writelog@contesting.com> |
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Subject: | [WriteLog] PTT on CW port RTS |
From: | hamcat@directvinternet.com (K4SB) |
Date: | Thu, 22 Aug 2002 17:08:09 +0000 |
Donald Eriksen wrote: > Here's my setup: I have a switching transistor with the base to parallel > port pin 16 through a 1K resistor. It works fine for PTT once the initial > rig turn-on problem is "fixed". Just as a short follow up to Don's post, I, for years, have used a much higher value of resistance than the 1K. I think all my keying lines now use 3300 ohms, which keeps the base voltage much lower, yet keys perfectly. Since the change, I have yet to blow a single transistor in the keying line. 73 Ed |
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