[Elecraft] Experiment: how much PL tone deviation is required to reliably key repeaters?

[Fred Jensen]

On 9/6/2014 9:36 AM, Wayne Burdick wrote:
> Hi all,
>
> There seems to be some debate about how much FM deviation is required
> for PL tones used to activate repeaters. There's a wide range of
> deviation values in use by transmitters, and various "standard"
> recommendations. The question is how much is needed for reliable
> operation in the real world.

The Cactus-Intertie [ask Eric] is 500 Hz deviation on 440 remotes. Audio 
deviation is 4-5 KHz, usually around 4. Link audio is flat.  None of the 
420 Nor-Cal links use PL, but those that do elsewhere are nominally at 
400 Hz PL/4 KHz audio deviation.  Any site with PL on an incoming link 
filters it out before going into the audio switch matrix.

Cactus works amazingly well, even with a half-dozen or more link segments.

73,

Fred K6DGW
-- No. Calif. Cactus Radio Assn. [NCCRA]
-- Affiliate of the Cactus Intertie
-- www.nccra.us