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Hi Kevin,
I use a Tait 300 series on my 6m
repeater.
I have found that although the filter is
technically correct for the 12.5KHz spec ( i.e 2.5KHz deviation max ) that few
if any Amateur rigs are setup for this correctly out of the box.
I have changed the filters in all of mine for 15KHz
bandwidth filters. I know the purists will say that my signal to noise ratio is
now not as good but it didn't make much difference in reality as 6m is such a
noisy band anyhow.
However the up side is that now all the users sound
great. Before I changed the filter many stations sounded distorted due to the
edges of the filter being exceeded by their deviation.
Other than that, I have had no difficulty with the
Taits at all, and used them for many years in my job as PMR
technician.
So to summarise, I would say all you needed to do
is to change this filter - you might be able to find a filter that is out of
something else that will fit as Tait no longer support the 300 series. I
approached them to get a 15KHz filter and that's when I found that out! I ended
up using a STC filter from a Pye R400 UHF link rx.
Check out the pictures on my web site www.gb3fh.org.uk You'll spot the 300's
there!
Hope this helps.
Matt
G4RKY
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