In addition to mounting all but the inductors and transformers for 80m the Warbler and a few more components for the 40m WSPR Warbler I have built a RockMite 30, for use as a Grabber RX only for 30m.
The evening welt with getting the Local oscillator (10.140MHz Xtal) down to 10.138.700. This is done by bypassing the frequency switching, using a simple serial connection of a 10uH inductor and a variable capacitance ( 12 - 30pF ).
The input Xtal filter will be added later, after stability test of the local oscillator, and will probably be a simple SIngle Xtal tunable filter.
Tomorrow will be busy with some non radio activities, so progress will be much slower than it has been this week end.
The Transistor that Changed the World -- the MOSFET
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*Another great video from Asianometry. *
*My only quibble is that it kind of left unclear the differences between
JFETs and MOSFETs. After all, we still...
1 day ago
Interesting... one may also consider penning down a crystal... hmmm, I will look into this.
ReplyDelete73, Joachim