Re: soundmodem PTT troubles

From: N1YRK (hdqg@veikkopalotie.fi)
Date: Fri Nov 03 2000 - 18:07:09 EET

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    On Fri, 3 Nov 2000, Thomas Sailer wrote:

    > N1YRK wrote:
    >
    > > Replacing the transistors in Thomas Sailer's circuit with a more common
    > > (and very cheap) 2N2222 got it working. The Hfe on BC237 Equivalent, ECG
    >
    > "More common" is a very relative statement, BC547 for example is
    > much more easily obtainable in europe compared to the 2N2222.

    I thought that might be the case.

    > The figures on my home page already say "or equivalent", and I've added
    > a more explicit note on the bottom of my page...

    I didn't have a transistor guide so I asked at the electronics store and
    they gave me the ECG 123AP which was BUNK. I'll get cross reference guide,
    or hunt down some online guide, in the future.

    Thanks Thomas,

    73,
    Bob

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