[VHFcontesting] Dielectric wattmeter slug question

Jeff DePolo jd0 at broadsci.com
Sat Oct 8 19:14:17 EDT 2016


> Guys,
> Looking for some information regarding Dielectric wattmeter 
> slugs (with the
> GS - General Signal logo).
> These are type 2327 rated 2.5kW @ 400>1000MHz & type 2328 rated 5kW @
> 400>1000MHz.
> They read extremely high when used in a standard Bird 43 meter.
> Perhaps used with a 100uA movement?
> Or, used in a larger line section (i.e. 1-5/8 or 3-1/4) with 
> less coupling ?
> 
> Looking for data sheets or other "tribal" info.
> 
> 73,
> Steve W1SMS

Most of the Sola/GS/Dielectric meters and slugs have a Coaxial Dynamics
equivalent.  The part numbers for the slugs are easy to cross-reference -
prefix the Dielectric part number with an "8" and you the equivalent CD part
number (e.g. 2327 = 82327).

Secret decoder ring - whether the part number is 2xyz (Dielectric) or 82xyz
(Coaxial Dynamics), the x digits is the line section size:

0 = 7/8"
1 = 1-5/8"
3 = 3-1/8"
4 = 4-1/16
6 = 6-1/8"

What you have are elements for a 1-5/8" line section, 30 uA meter movement.
They read so high because the coupling arm is too close to the center
conductor when installed in a 7/8" line section (Bird 43 or other).

Hope this helps.

				--- Jeff WN3A

---------------------------------
Jeff DePolo, Senior Engineer
Broadcast Sciences LLC
Valley Forge, Pennsylvania
610.917.3000
 


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