----- Original Message ----- From: "Richard (Rick) Karlquist" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" <[email protected]> Sent: Tuesday, June 20, 2006 5:03 PM Subject: Re: [time-nuts] 10811 Extra Lagging etc
> Not a good idea. The best thing you could do to improve > temp stability of a 10811 is to tweak the resistors that > proportion the power between the two heater transistors. > At some ratio, the thermal gain will peak at over 1000 > typically. If you just take pot luck, you would be lucky > to do 100. You are still limited by the tempco of the > electronics, no matter what thermal gain you achieve at > the crystal. > > You should also be aware that the 10811 is fairly humidity > sensitive, which can seem like temperature sensitivity > if the humidity and temperature change together. So if the 10811 is placed in a temperature and humidity controlled environment it will do better-just don't apply lagging etc in close round the actual oven assy itself? Presume the aim is to have the humidity as low as possible? What about the room temperature? I suppose the 'sweet point' depends on the indivdual 10811 unit? DaveB Christchurch, NZ -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.9.1/369 - Release Date: 19/06/2006 _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
