My neighbor was throwing out a 1 meter dish. Is there a practical limit to the dish size for the ldf 5ghz? Or is bigger better?
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Orv W6BI
Bigger usually means more gain due to higher directionality. This means the lobe of the signal has a narrower beamwidth (both vertical and horizontal).
The only negative side of having a larger dish is that it is harder to point successfully, especially vertical adjustment on offset parabolic dishes. Orv said it perfectly when he said the key is to make sure you get the face of the LDF-5 perfectly aligned in the focal point of the dish before you begin pointing it.
- Damon K9CQB
Not only does a larger dish give you more gain because of a narrower beamwidth, but that narrower beamwidth can also act as blinders to reduce seeing signals off the side. Sometimes I use a larger dish, not for additional gain, but to reduce interference from incoming signals off the main beam.
Burt, K6OQK