CRYSTALS in general are manufactured with a "C" factor which varies from rig
to rig. When you order crystals this is EXTREMELY important or you will never
be able to tune the crystal for your application. I would NOT be surprised if
Yaesu does NOT tell you what this is so that you are forced to buy crystals
from them. You can measure this though if the old crystal is still good.
Kevin
----- Original Message -----
From: Peter - LC0TC
Date: Sunday, July 19, 2009 7:45 am
Subject: Re: [Yaesu] part needed
To: Paul Kraemer , yaesu@contesting.com
> Is it possible that the standard crystals are made to a
> different (wider?)
> specification and .have another parallell capacity than that
> type used by
> Yaesu?
>
> Peter LB0K
>
>
> -----Opprinnelig melding-----
> Fra: yaesu-bounces@contesting.com [mailto:yaesu-
> bounces@contesting.com]Pavegne av Paul Kraemer
> Sendt: 14. juli 2009 21:21
> Til: yaesu@contesting.com
> Emne: [Yaesu] part needed
>
> Need part 71800106 HC-18/U 18.0MHz xtal #210045-1
> Used in FT-901 counter unit
> Have tried "off the shelf" 18 MHz crystals from Mouser and DigiKey
> The frequency is correct but they cannot be moved by the
> corrector variable
> cap in the circuit
> Am I missing something???
> Paul K0UYA
>
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