On Fri, 18 Jan 2008 13:50:00 -0000, "Gareth Magennis"
wrote:
"Don Pearce" wrote in message
...
On Fri, 18 Jan 2008 13:21:41 -0000, "Gareth Magennis"
wrote:
Sorry, I was a bit preature on that one.
New question: I thought I had a faulty aeriel on an IEM receiver. I have
substituted a piece of wire 34.8cm long, since by my calculation of V =
FL,
this is the wavelength of the transmitting frequency of 860.900 MHz.. The
receiver still has crap reception. I take it this should work as a good
aeriel?
Try halving that length - half wave is the normal aerial length. But
what about the location? Is this thing up in the clear where it is
likely to get a good signal? More to the point, has it just stopped
working, or is this the first time you have used it in this location?
Just tried that, no good. The original aeriel is just a quarter length
piece of wire isn't it?
Quite right - stupid me. Half wave is for two bits of wire in opposite
directions.
The location is my workshop and it loses reception after 2 metres. I have
another receiver which detects strong RF from the transmitter, and I've
taken this receiver apart and cleaned all the connections/ribbon cables etc,
so it looks like its goosed. Its a Sennheiser EW300. Going back to
Sennheiser.
Sounds that way. Either that or you have some serious interference
locally on the same frequency.
Kind of thought I'd use the opportunity to learn about radios.
I think you have - the hard way.
d
--
Pearce Consulting
http://www.pearce.uk.com