[Fourlanders] 222 Bandpass filter needed

Bob Lear w4zst at windstream.net
Mon Nov 24 22:35:35 EST 2008


This is regarding the recent problem with the WA4IOB 222 beacon which 
has been shut down since the spur problem.  I ran into Gary at the Stone 
Mountain hamfest and we discussed the situation.  He said a filter will 
probably solve the problem and he has a network analyzer with which to 
tune one if we can come up with a suitable filter for him.

I thought I had one, but it turned out to be too high in frequency.  I'm 
still looking in the mess I'm making while moving and losing stuff left 
and right in boxes here and there!!  I did find some military 'D' Band 
dual tunable cavities that are for 400-450 and 450-500.  Gary said that 
type device would work if they cover the 220 band, but I know these I 
have aren't going to work at 222.  Does anyone on the Fourlanders list 
have something suitable?  I'll try here first and if we don't come up 
with something, I'll try the SVHFS list next.

Thanks for checking.  Let me or Gary know what you have to help the 
situation.  We'd like to the the 222 beacon back on the air.

73, Bob


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