If you decide to use an 85 deg C oven, you must get the crystal cut for that
temperature.
I have plenty of GE ovens here if you need one....6 or 12 volts.
73 John VE3AMZ
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <Repeater-Builder@yahoogroups.com>
Sent: Tuesday, May 23, 2006 11:51 AM
Subject: Re: [Repeater-Builder] midland 13-509 tx freq stability... cap change?
>
> Or use a Motorola crystal oven @ 85 degrees C ...
>
> Neil - WA6KLA
>
>
> ---- Original Message ----
> From: [EMAIL PROTECTED]
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] midland 13-509 tx freq stability...
> cap change?
> Date: Tue, 23 May 2006 08:43:33 -0700
>
> >At 5/23/2006 07:20, you wrote:
> >> >
> >>One other thing you might try - tape a 100 ohm 1 watt resistor to
> >the
> >>side of the crystal and put 12 VDC across it. Not a pretty sight,
> >and
> >
> >If you're going to heat the crystal, might as well use something that
> >will
> >keep it at a more or less stable temperature: a 50 ohms 50 degree C
> >PTC
> >thermistor. Digikey has them for $1.68 each (manufacturer part #
> >RL3006-50-50-25-PTO). Desolder one of the leads & solder the disk
> >directly
> >onto one side of the crystal, ground the crystal case & apply a
> >regulated
> >voltage to the other side.
> >
> >Bob NO6B
> >
> >
> >
> >
> >
> >
> >
> >Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
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