[Milsurplus] Making Stable Inductors for 2 MHz

[mstangelo at comcast.net]

John,

You can make a fairly stable FET based LC oscillator but if you key the oscillator the ocsillator may vary in frequency or "chirp" when turning on. The LC oscillators in Ham rigs prevented this letting the oscillator free run and keying a buffer stage. I'd recommend letting the oscillator free run, key the buffer stage and shape the signal at the buffer.

Does the oscillator have to be tuneable or fixed frequency? If it's fixed frequency I'd use a crystal/divider circuit with a keyed buffer stage.

It would be interesting to find out how Loran Receiver's were bench tested. Does andyone have nany information on Loran test sets?

73.

Mike N2MS




----- Original Message -----
From: J. Forster <jfor at quik.com>
To: Milsurplus at mailman.qth.net
Sent: Wed, 29 Jun 2011 01:24:20 -0000 (UTC)
Subject: [Milsurplus] Making Stable Inductors for 2 MHz

Hi All,

I'm working on a LORAN-A simulator for the DAS-1 on the MASSACHUSETTS and
have a design question.

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