[R-390] RE: Mechanical Filter Repair

[Llgpt at aol.com]

Another option. Purchase a filter module from Kiwa Electronics. They have a  
variety of bandwidths. The shape factors are much better than the mechanical  
filters. They are 3 filters cascaded in a small module. They have much better  
audio characteristics than the mechanical filters too.    
_http://www.kiwa.com/kiwa455.html_ (http://www.kiwa.com/kiwa455.html) 
 
Les Locklear
 
 
In a message dated 8/18/2004 10:39:13 AM Central Daylight Time,  
dpharr53 at swbell.net writes:

All:

Many thanks for the responses to my question.  It  looks like my options are
the following:

1. Purchase a spare IF  strip module from American Trans Coil($72) and hope
that the 4kc filter is  good.
2. Purchase a replacement filter through ER Mag ($175).
3.  Purchase a new Collins filter from Inrad ($125) and still have to deal
with  the impedance matching issue.
4. Look into the cheap ceramic filters  offered by Toko and Murata and also
deal with the impedance matching  issue.
5. And finally, try to repair the filter, but reports are that the  success
rate, had by others that have tried, has been very  low.

Right now I'm looking at pursuing options 1 and 4.  I think  $72 is a
reasonable price to pay for an entire IF strip module, even if  some of the
filters are bad.  Also, the Toko and Murata filters are  cheap at about $2
each and they would be fun to play with, although I don't  expect to see
performance equal to the mechanical filters.  All in  all, I suspect I'll get
what I pay for.

Thanks  again,
73
Dennis  Pharr
WD5JWY