KAS 297B Altitude Preselect question

[No Spam]

I tried on rec.av.IFR and got no response, so I thought I'd try here.

Anybody know what it takes to adjust the alert volume on the King KAS 297B
unit? The volume is killing my ears.

TIA,

-> Don
Farming looks mighty easy when your plow is a pencil and you are
a thousand miles from the corn field. - Dwight D. Eisenhower

[DR]

The sheet I looked said that unit gives 2V p-p into 500 ohms. No wonder
it is loud. Can you add a resistor or a potentiometer into the signal
line? If you use a pot, get a 500 ohm potentiometer (log response would
be best type) across the output and ground and wire the wiper so as to
make it the new output line -i.e. as a regular volume control. If you
can only fit an inline resistor into the signal line, try several values
from say 100 ohm up until you get a suitable (still loud) volume.

Disclaimer: Such a modification is entirely at your own risk and I make
no recommendation whatsoever as to the suitability of this mod. for
inflight use.

Cheers MC

No Spam wrote:
> I tried on rec.av.IFR and got no response, so I thought I'd try here.
>
> Anybody know what it takes to adjust the alert volume on the King KAS 297B
> unit? The volume is killing my ears.
>
> TIA,
>
> -> Don
> Farming looks mighty easy when your plow is a pencil and you are
> a thousand miles from the corn field. - Dwight D. Eisenhower
>

[No Spam]

Thanks, MC. I was hoping there was a screw on the box somewhere.

-> Don
Everything is funny as long as it is happening to somebody else.
- Will Rogers

On 11/13/06 22:38, "DR" > wrote:

> The sheet I looked said that unit gives 2V p-p into 500 ohms. No wonder
> it is loud. Can you add a resistor or a potentiometer into the signal
> line? If you use a pot, get a 500 ohm potentiometer (log response would
> be best type) across the output and ground and wire the wiper so as to
> make it the new output line -i.e. as a regular volume control. If you
> can only fit an inline resistor into the signal line, try several values
> from say 100 ohm up until you get a suitable (still loud) volume.
>
> Disclaimer: Such a modification is entirely at your own risk and I make
> no recommendation whatsoever as to the suitability of this mod. for
> inflight use.
>
> Cheers MC
>
> No Spam wrote:
>> I tried on rec.av.IFR and got no response, so I thought I'd try here.
>>
>> Anybody know what it takes to adjust the alert volume on the King KAS 297B
>> unit? The volume is killing my ears.
>>
>> TIA,
>>
>> -> Don
>> Farming looks mighty easy when your plow is a pencil and you are
>> a thousand miles from the corn field. - Dwight D. Eisenhower