Altus Metrum TeleGPS mountng hole measurements

[mpitfield]

I am looking for the hole measurements for the Altus Metrum TeleGPS?

 

[ksaves2]

4-40 screws. I looked on the Altus Metrum site for a template but they didn't have one listed for the Tele-GPS. I used mine for the pattern for the sled. Kurt

 

[mpitfield]

4-40 screws. I looked on the Altus Metrum site for a template but they didn't have one listed for the Tele-GPS. I used mine for the pattern for the sled. Kurt

Thanks Kurt,

Chris from Chris' rocket supplies also sent me an email with the following:

"hole pattern is a rectangle 1.25 x 0.75 inches, holes 4-40 / M3 screws"

Now I just need the length of the wire antenna?

 

[tbonerocketeer]

Thanks Kurt,

Chris from Chris' rocket supplies also sent me an email with the following:

"hole pattern is a rectangle 1.25 x 0.75 inches, holes 4-40 / M3 screws"

Now I just need the length of the wire antenna?

I am waiting on the answer for it

 

[keithp]

Now I just need the length of the wire antenna?

about 6 1/2 inches. 1/4 of the wavelength, which, for 435MHz, is about 6 3/4 inches, then adjusted for the velocity factor of a copper wire (around 95%).

 

[mpitfield]

about 6 1/2 inches. 1/4 of the wavelength, which, for 435MHz, is about 6 3/4 inches, then adjusted for the velocity factor of a copper wire (around 95%).

I am going with 6.75 then...thanks Keith Chris and Kurt for your efforts.