At 2/7/2005 12:19 PM, you wrote:
>I recently rebuilt my 440 repeater and got away from the Mastr II mobile
>w/ tripler PA and went to a Mastr II Station. As a part of the upgrade, I
>sent a set of 2C icoms to International Crystal and had them recrystaled
>to my frequency. It has been on the air since the end of December. When
>I first put in on, everything was great. After about 2 weeks, I couldn t
>get into it anymore. After some experimenting, I found that if I tuned
>down from 449.325 (rx freq) to 449.310 I could bring it up. Went back to
>the site with the service monitor and put it back on frequency. That was
>3 weeks ago. A few days ago, can t bring up the repeater. I tried at
>449.320. Bingo! There it is.
>
>
>
>My question& Is it normal for a crystal to drift that much over the
>first month or so? I don t remember having this problem before but it s
>been a while. No, the building is not climate controlled but is insulated
>very well and the temperatures have been pretty mild around here lately.
Although crystals do age a very small amount, it's not normal for it to
move this much. Sounds like some contamination got inside the can.
For as much as ICM charges for crystals these days, you should have no
problem getting a replacement from them at no charge.
Bob NO6B
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