Warren, I take the point that you are testing the SAME oscillator as a means of adding some consistency to the test. However, leaving aside this consistency and issues relating to the disciplining device (your TBOLT), I suggest your test of double vs single oven OCXO may be unfair to the single oven device.
A well designed high performance single-oven OCXO will include such techniques as ambient compensation and (for example the HP E1938A) incredibly complex high-gain temperature control. As a result, performance can challenge the traditional DOCXO, including temperature slope performance. Your inner-oven only device isn't necessarily a good representative of a single-oven OCXO. While we might expect inner-oven-only to operate like a single-oven 10811A, it may be that the DOCXO inner oven doesn't have the power or thermal gain to handle more than the slight temperature variations (and temp slope) it would see within the outer oven. Try the test again with a single-oven variant 10811A, or with a modern high performance SOCXO such as RAKON STP2602LF. Regards, Murray ZL1BPU _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
