[Fourlanders] 222 Bandpass filter needed

[Robin Midgett]

I have cavities; will email the documentation to Bob off list. Brian 
should have this info as well.
Also, surplus 72 MHz. pager transmitter cavities can be used on the 
3rd harmonic. These tall, narrow cans are usually very cheap at 
hamfests. I have a pair, and can try tuning them this weekend. What 
frequency do we want to pass?


At 09:35 PM 11/24/2008, you wrote:
>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
>_______________________________________________
>Fourlanders mailing list
>Fourlanders at contesting.com
>http://lists.contesting.com/mailman/listinfo/fourlanders

Thanks,
Robin Midgett K4IDC
615-322-5836 office - rolls to pager
615-336-7091 cellular
615-301-1642 home
K4IDC at comcast.net
Radio Gear For Sale: http://www.people.vanderbilt.edu/~robin.midgett/index.htm