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| To: | M0FMT <[email protected]> |
|---|---|
| Subject: | Re: FW: LF: FETs getting sick - why not use tubes? |
| From: | Chris Wilson <[email protected]> |
| Date: | Wed, 5 Apr 2017 13:28:56 +0100 |
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| In-reply-to: | <CANi3vvs_Obih-1UWxdaRNiJXE1T5ZuEHpYEq4SWnFyxcthzzUg@mail.gmail.com> |
| References: | <[email protected]> <[email protected]> <CANi3vvs_Obih-1UWxdaRNiJXE1T5ZuEHpYEq4SWnFyxcthzzUg@mail.gmail.com> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
Hello M0FMT, Wednesday, April 5, 2017 Did you not find the Transorbs added capacitance upset things? I found the drain waveform was considerably deteriorated when I experimented with Transorbs to limit spikes. > Hi all > The Decca PA seems to be scattered with spike limiting diode from > memory Transils / Transorb TVS diodes. (don't know the values) I > usually put one in the drain set above the peak drain wave voltage > seen on the scope and below the peak operating value of the FET So far so > good in single ended amps. > Jim M0MBU did a short treatise see > http://www.wireless.org.uk/guard.htm. > The Decca TX "guard circuit" by Jim Moritz, M0BMU. > 73 petefmt mailto:[email protected] |
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