[time-nuts] What's the best way to double 10 MHz to 20 MHz ?

dave powis g4hup at btinternet.com
Wed May 25 11:24:18 UTC 2011



Hi Dave,

Use a diode doubler, follwed by a 20MHz filter and a MMIC /attenuator 
combination to allow you to set the level.  If you need more detail, e-mail me 
directly and I'll provide.

73,
Dave


________________________________
From: Dr. David Kirkby <david.kirkby at onetel.net>
To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
Sent: Wednesday, 25 May, 2011 8:52:12
Subject: [time-nuts] What's the best way to double 10 MHz to 20 MHz ?

I'm still trying to find a solution to replacing a standard crystal in a Kenwood 
TS-940S transceiver with something more accurate. The transceiver uses a 20 MHz 
crystal oscillator, though a 20 MHz TCXO was available as an option, though few 
rigs appear to be fitted with it.

If one was to make a 20 MHz reference, what's the best way to get a 20 MHz sine 
wave (at least 0 dBm) from a 10 MHz TCXO or OCXO? The 10 MHz devices seem much 
more popular than 20 MHz ones, so I can probably pick a higher spec 10 MHz 
device more easily.

Dave

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