[R-390] 4KC Filter

[nryan at mchsi.com]

I would first ask myself if the receiver is seriously impaired with an under-performing 4 KC filter.  I have one such and compensate for it by turning up the volume a bit.

These filters are increasingly hard to come by and best reserved for instances of open or shorted filters.

Just my .02.

Norman, KG4SWM

Any activity becomes creative when the doer cares about doing it right, or doing it better. -- John Updike


----- Original Message -----
From: Anthony Casorso <canthony15 at msn.com>
To: jbrannig at verizon.net, r-390 at mailman.qth.net
Sent: Fri, 11 May 2012 20:37:31 -0500 (CDT)
Subject: Re: [R-390] 4KC Filter


My 67 EAC is the same way. Down about half on 4KHz. I have measured the bandwidth and it is still fairly close to 4KHz. I just let the AGC make it up but I have been considering a new filter.
Tony

> From: jbrannig at verizon.net
> To: r-390 at mailman.qth.net
> Date: Fri, 11 May 2012 12:42:23 -0400
> Subject: [R-390] 4KC Filter
> 
> I'm in the process of aligning my 67 EAC R-390A.
> 
> All is working well except for the 4KC filter, the signal level is about 
> half (3db.)  the level of all the other filters.
> 
> The trimmers peak normally.
> 
> Bad Filter?  I hope not, any other ideas?
> 
> Thanks
> 
> Jim 
> 

 		 	   		  
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