[INRAD] Filter Board

[Charlie Mazoch Jr.]

Hi Bob:
  I totally agree about the cascaded filters helping. I installed one 
into a FT-980 Yaesu and was pleasantly surprised. We're going to have to 
keep George healthy and happy. This is one nice product and he has more 
in the pipe. I want to start experimenting with his roofing filters when 
they arrive. I have three radios I'd like to modify. The major 
difference between an affordable radio and an expensive one is 
selectivity. If the IF doesn't overload from adjacent signals causing 
it's AGC to go berserk most mid range priced rigs perform very well.
Charlie W5VIN

N5IET Bob wrote:

>Well, I got it working. 
>
>I had to unsolder all filters and reinstall and now all is
>well.
>
>I bought this board used, so I will say this, I have been
>Doing electronics for a long time and unless you
>have at min a couple of years of quality soldering
>experience behind you, get someone who does to work on
>these boards for you (especially if you are taking the
>filters off the board).
>
>This switchboard is really nice BTW.
>
>Works like a champ on the dx pile ups. Now I have to turn
>it off to find the pile up and turn it back on when I get
>there. Hi Hi
>
>This is great. 
>
>Thanks INRAD for a job well done.
>
> 73 fer nw,
>Bob N5IET
>
>10X# 37210, FP#-1141, SMIRK#-5177
>http://www.n5iet.com/
>Code may be taking a back seat for now,
>but the pioneering spirit that put the code
>there in the first place is out front of it all.
>
>  
>
>>-----Original Message-----
>>From: List-bounces at inrad.net
>>    
>>
>[mailto:List-bounces at inrad.net] 
>  
>
>>On Behalf Of N5IET Bob
>>Sent: Monday, October 24, 2005 3:44 AM
>>To: list at inrad.net
>>Subject: [INRAD] Filter Board
>>
>>
>>Working with an FT-920 rig, I just installed a 103
>>    
>>
>filter
>  
>
>>board after installing INRAD filters on it. The 250CW
>>    
>>
>and
>  
>
>>the 400CW.
>>
>>After following the instructions very carefully, it does
>>not seem to be working for some reason.
>>
>>After tuning into a strong signal on 40 meters - With
>>    
>>
>the 
>  
>
>>switch in the position toward the mic connector it
>>    
>>
>utilizes 
>  
>
>>the F1 filter just fine.
>>
>>In the position toward the DSP (when the second filter
>>should be in the mix, I get a very low noise receiver
>>    
>>
>but
>  
>
>>one with no signals coming in at all (too low).
>>
>>I have double checked to see that gain is at the twelve
>>o'clock position, I have checked all solder joints with
>>    
>>
>a 
>  
>
>>magnifying glass. I have double checked all connections.
>>    
>>
>I 
>  
>
>>have used both filters independent of soldering them on
>>    
>>
>the 
>  
>
>>board to make sure they worked.
>>
>>Does anyone have a drawing or diagram of the board
>>    
>>
>itself
>  
>
>>which shows me what voltages to look for on the board,
>>    
>>
>so
>  
>
>>I can troubleshoot the board?
>>
>>
>>
>> 73 fer nw,
>>Bob N5IET
>>
>>10X# 37210, FP#-1141, SMIRK#-5177
>>http://www.n5iet.com/
>>Code may be taking a back seat for now,
>>but the pioneering spirit that put the code
>>there in the first place is out front of it all.
>>
>>
>>
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>>    
>>
>International 
>  
>
>>Radio INRAD Web Site: http://www.qth.com/inrad
>>
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>>List Help:
>>    
>>
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>  
>
>
>
>
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>
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