[Lowfer] Frequency correction

[Bill Ashlock]

Mike,

>Now watch the oscillator will get weird because the crystal's load chang=
ed.

Would it get weird from changing the series capacity from about 10pf to 9=
.999pf? We are talking about less than a 2 ppm change.

>How about a multi-turn pot and a tuning diode??? That should be able to =
QSY
>all over the place (VXO).

Oh yah that's all I need - a basically temperature sensitive component to=
 mess up a < 2 ppm per year drift? Already have a npo trimmer that gives =
me plenty of tuning range. Actually I have tuning cap in the circuit to i=
nsert the slant modulation but it has only a 1 ppm effect because it is i=
n series with a 1pf capacitor - so the tuning cap tempco has a minimal ef=
fect on overall freq stability. I'll send you the circuit. =20

BTW I sent the transistors from work today (Tues).

BillGet more from the Web.  FREE MSN Explorer download : http://explorer.=
msn.com


--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment. Attachments are not allowed.
Please post in Plain-Text only.---