[time-nuts] Double oven ocxo's was Tbolt reception problems

[WarrenS]

Rich

> You don't need a double oven with the E1938A
Maybe the E1938A does not need it, 
BUT it SURE does helps the average OXCO to keep it at a VERY constant temp when looking at parts in e-12 freq changes.

How about the 10811-60158?  
I think? that (or some version of it) is what is used in the Z3801A.

My testing shows that the ones I have sure need their outer ovens working to get the best performance, even over just small room temp changes.

ws

***************
----- Original Message ----- 
From: "Rick Karlquist" <richard at karlquist.com>
To: "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
Sent: Wednesday, November 25, 2009 5:18 PM
Subject: Re: [time-nuts] Double oven ocxo's was Tbolt reception problems


> John Green wrote:
>> As to the double oven OCXO, I have 2 I purchased off eBay in the last few
>> months. One is a Morion MV89 and the other a UCT 8663. I compared both to
>> the Z3801 over several days and was not impressed. They seemed no better
>> than a good single oven unit. Of course, I wasn't trying them over a large
>> temperature excursion but I expected them to be better than a single oven.
> 
> We demonstrated thermal gains of over 1 million in the E1938A
> single oven oscillator.  You don't need a double oven.
> 
> Rick Karlquist N6RK
> 
> 
> 
>