Local 8660C guru AA7A got mine to work by tweaking a lot of the internal
adjustments. This is not for the faint hearted. You'll need the complete
set of service manuals. He ended up having to make an adjustment on the
11661B Frequency Extension Module to get the 1300MHz plug-in to work
consistently above 110 MHz. That was in addition to swapping the 11661B for
a known good unit. The YIG oscillator does die on those modules. Good
luck.
73
Gary, N7IR
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Yah, I installed the 11811 (that was the 'required option' I was
referring to, couldn't remember the number) .. I was thinking there
was some other config somewhere to let the control module know it's
there?
jd
On Mon, Jun 8, 2009 at 6:03 PM, Ted Hartson<awombat@earthlink.net> wrote:
> A whole big 4 GHz Yig module called as I recall an 11811 is necessary for
> the 8660 to go beyond 110 MHz even with a higher range drawer.
>
> The module lives behind the Mod drawer and is about 3X3" and 4 inches
tall,
> if it is absent UR screwed Ted WA8ULG
> ----- Original Message ----- From: "John D'Ausilio" <jdausilio@gmail.com>
> To: "(Radio) VHF Contesting" <VHFcontesting@contesting.com>; "Microwave"
> <microwave@lists.valinet.com>
> Sent: Monday, June 08, 2009 2:47 PM
> Subject: [Mw] 8660C won't go over 100MHz
>
>
>> I have an 8660C which had the 110Mhz plugin, and I accquired the
>> 1300Mhz plugin and the required option and stuck it in. The controller
>> is happy to tune up to 1299.999Mhz, but the output falls to 0 on the
>> meter as soon as you pass 99.999Mhz. Anyone know how to make this
>> thing happy? Maybe a jumper somewhere?
>>
>> de w1rt/john
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