Re: Revision 2 board mods
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Karl,
I am aware of two "diode mods" for QRP Labs transceivers.
The first is a fix for potential overvoltage at the drains of the PA transistors of QDX. It involves placing a commutating diode across QDX L14.
The second is a fix for for a T/R switch problem in QMX.
JZ KJ4A?
On a roll with getting T507 actually connected to the radio, getting fw .017 loaded into radio and all by myself getting into PuttY repeatedly and seeing positive results!?
Then I see here someone putting in "the dreaded diode mod" and wondering what mod!?
There on QRPLabs.com site are TWO mods! The diode mod MAY SOLVE LOW POWER OUT PROBLEMS! Fancy that! "Birdies" on receive, unwanted oscillations...you mean those tones up and down the band like someone tuning up on CW and left his tool box sitting on the key ?? I got em! And I don't hear them on the IC-7300 nor the RS-918 mcHF clone.
Will report the results...
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73
Karl
KI4ZUQ
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