[R-390] Mechanical filter substitute

[Bob Camp]

Hi

There's a problem with that around here.

We put the kraut *inside* the perogis.

We also put good stuff like mushrooms, pruned, onions, and lima beans  
in them. Pretty tasty.

I suppose you could do a mix and match, but then you really wouldn't  
be using Kilbasa ....

Bob


On Dec 18, 2007, at 4:09 PM, Barry Hauser wrote:

> Impedance is variable -- adjust length, or to reduce impedance, add  
> some of that red sauerkraut.  To increase impedance, incorporate  
> some perogis.
>
> (I actually had a dinner of all three -- kielbasa, red kraut &  
> perogis -- last night -- hopefully in the correct proportions.  I  
> kid you not.)
>
> Barry
>
>
>
> rbethman wrote:
>> Since we ARE off on another wild hair - How about pan fried  
>> Kielbasa?  What's the impedance?
>>
>> Bob - N0DGN (( Duckin' and Runnin' !))
>>
>> Bob Camp wrote:
>>> Hi
>>>
>>> The R-390A filters are high impedance. I don't remember the exact  
>>> numbers, but > 100K ohms would not surprise me at all.
>>>
>>> Bob
>>>
>>>
>>> On Dec 18, 2007, at 12:09 PM, Jon Schlegel wrote:
>>>
>>>> Thanks for all the info guys,
>>>>
>>>> Bob C - I'll cobb in the 10k to see what happens.  BTW, Maybe Bob  
>>>> N. should try using one of the Motorola Permakay filters.  Think  
>>>> I still got a few around here somewhere...
>>>>
>>>> Also what are the in/out Zs of the mechanical filters.  If I want  
>>>> to measure one what source/load should it be looking into?
>>>>
>>>> Jon
>>>>
>>>>
>>>>
>>>> At 09:23 AM 12/18/2007 -0600, you wrote:
>>>>> On Dec 18, 2007 9:14 AM, Bob Camp <ham at cq.nu> wrote:
>>>>>
>>>>> > Before you go to crazy - sling a 10K ohm resistor between  
>>>>> input and
>>>>> > output directly on the filter.
>>>>>
>>>>> Good tip, Bob.   And it reminded me - at the Belevidere IL  
>>>>> hamfest I saw a Collins 75A series receiver that had a homebrew  
>>>>> "filter replacement" in it.  This was a small perf-board with a  
>>>>> couple of chokes and capacitors which would obviously be for  
>>>>> wideband AM but I thought it would be neat to give it a try.    
>>>>> Of course I forgot to go back and sketch the circuit!   Wonder  
>>>>> if anyone knows about this and has the design details?
>>>>>
>>>>> 73, Bob W9RAN
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