1 Jan
2009
1 Jan
'09
10:17 a.m.
You might find an old Motorola TU-540W filter around a two-way radio shop. Those were used in equipment when the deviation was +/- 15 kHz and when the deviation was dropped to +/- 5 kHz the filters were replaced with the TU-540S. They are for a 455 kHz i.f.
Glen, K9STH
Website: http://k9sth.com
--- On Wed, 12/31/08, Art McBride kc6uqh@cox.net wrote:
From: Art McBride kc6uqh@cox.net
My point is that filter is not easily found in a 455 KHz center frequency. ECS, Inc. makes 30 KHz wide filters in 10.7 , 21.4 and 45 MHz center frequencies in 2 and 4 pole. They are available from Digi-Key. 455 KHz is reserved for narrow band applications.