John,
Front-end crystal filters are generally available only up to 200 MHz or
thereabouts, so you may not find a supplier of such a filter for the 70cm
band. Here is one of several sources of crystal filters:
http://www.mtronpti.com/products/index.php?id=65
73, Eric Lemmon WB6FLY
Make sure that you have the signal level to use a crystal filter. Some can be
as low as 2db insertion loss, others can be as high as 10db.
At 11:44 AM 11/24/06, you wrote:
John,
Front-end crystal filters are generally available only up to 200 MHz or
thereabouts, so you may not find a supplier of
What bandwidth? What insertion loss?
A 150 MHz xtal filter with 6 KHz BW has about 11.5 dB insertion loss.
A 140 MHz xtal filter with 40 KHz BW has about 5 dB insertion loss.
See http://www.filtro.net/products/filters/filters.asp
73
Glenn
WB4UIV
At 04:19 PM 11/19/06, you wrote:
Any
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