[ARC5] Butler/Xtal Oscillator [Was - 1 MHZ Success]

[Bruce Long]

LesYou can indeed make a low parts count crystal osc from the gate in the 4060 but i have always assumed pretty much any discrete transistor oscillator will outperform pretty much any gate xtal oscillator  so in my opinion keep your Butler osc.    bruce


      From: Leslie Smith <vk2bcu at operamail.com>
 To: arc5 at mailman.qth.net 
 Sent: Sunday, June 19, 2016 11:45 PM
 Subject: [ARC5] Butler/Xtal Oscillator [Was - 1 MHZ Success]
   
  Hello Wayne,
   At the moment I'm building a GP oscillator (xtal controlled).
  It's the Butler circuit I sent some days ago.
  Two transistor, 50kHz to 10MHz (according to the 'blurb' accompanying the circuit).
  
  I'll write about stability, range, waveform and so on when I have some results.
  In particular I want to know if this 2-transistor Butler oscillator followed by a 4040 divider is more precise (in terms of accuracy) than a 4060 oscillator-divider chip.
   As for the 1MHz modules you mentioned - I have some of those.
  Never tickled their power pins with voltage; they were so cheap and appeared so useful I couldn't resist buying a few.
  HC-49U crystals are cheap at the moment. 
    73 de Les Smith
   vk2bcu at operamail.com
   On Sun, Jun 19, 2016, at 03:03, Robert  Eleazer wrote:

I decided to see if I could replace the 1 MHZ calibrator module in my SG-297 with a 7805 regulator powering a 1 MHZ TTL oscillator.  Despite having wired it wrong the first time, I eventually got it to work on the bench (with a weird but stable signal on the scope at 1.000062 MHZ).  Then I plugged it into the SG-297.  And it works.  The 1 MHZ oscillator feeds a harmonic oscillator to produce signals every 1 MHZ across the range of the instrument, so I guess that approach tames the TTL waveform a bit.
 
Wayne
WB5WSV         
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