AirNav Systems Forum

AirNav Radar => AirNav Radar Discussion => Topic started by: sasa1000 on May 30, 2010, 09:25:13 AM

Title: Biscuit Tin Lid
Post by: sasa1000 on May 30, 2010, 09:25:13 AM
Just wondering if sitting supplied antenna on biscuit tin lid in same position as without will be of much benefit. Will I see an increase in range or better coverage? Just asking as I am new to all this and realise there are a lot of people on here who are very knowledgeable on the subject. If it will make a difference, I will try it later on if I get a chance. Just experimenting before siting outside.

Sandy
Title: Re: Biscuit Tin Lid
Post by: Deadcalm on May 30, 2010, 10:44:16 AM
Before I invested in an external antenna, the biscuit tin lid concept of a ground plane worked for me - I found it made quite a difference.  It also gave the supplied antenna (which has a tiny base) some stability.  Still use the lid if I use my RB in the garden, with the laptop.

DC
Title: Re: Biscuit Tin Lid
Post by: g0seg on May 30, 2010, 10:59:58 AM
Just a point in passing. Yes, an increased area groundplane does help. I suggest you get a teflon covered cake tin about a foot in diameter so you get more area and no corrosion! Bi now, Roger
Title: Re: Biscuit Tin Lid
Post by: sasa1000 on May 30, 2010, 01:49:02 PM
Thanks guys, that's what I needed to know. Now just to get the wife to look the other way while I acquire the lid off the biscuit tin.

Sandy
Title: Re: Biscuit Tin Lid
Post by: viking9 on May 31, 2010, 09:13:49 AM
Quote from: sasa1000 on May 30, 2010, 01:49:02 PM
Thanks guys, that's what I needed to know. Now just to get the wife to look the other way while I acquire the lid off the biscuit tin.

Sandy

Or you could buy her a tin of Cadbury's Roses or Quality Street. :o)

Tom
Title: Re: Biscuit Tin Lid
Post by: sasa1000 on May 31, 2010, 04:07:50 PM
That's a good idea Tom, but slightly flawed as I would probably eat the sweets myself (Well the good ones) Thrown out hundreds of tins over the years too!

Sandy
Title: Re: Biscuit Tin Lid
Post by: Paulc on June 01, 2010, 04:49:51 PM
May have to resort to a tin lid as my baseplate has gone awol unless I can buy another one from somewhere - any suggestions?
Title: Re: Biscuit Tin Lid
Post by: MW0CVW on June 01, 2010, 06:32:36 PM
Blast from the past, the old Biscuit tin lid as a ground plane.
not very good back in the CB/27/81 days.
But a better ground plane at 1090 Mhz
cos the waves are much shorter!.