[R-390] Mechanical filter substitute

[Les Locklear]

Sweet!!! Although it probably wasn't after a few hours....heh....heh

Les
----- Original Message ----- 
From: "Barry Hauser" <barry at hausernet.com>
To: "rbethman" <rbethman at comcast.net>
Cc: <r-390 at mailman.qth.net>
Sent: Tuesday, December 18, 2007 3:09 PM
Subject: Re: [R-390] Mechanical filter substitute


> 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
>>>>> _____________________________________________________________
>>>>> R-390 mailing list
>>>>> Home: http://mailman.qth.net/mailman/listinfo/r-390
>>>>> Help: http://mailman.qth.net/faq.htm
>>>>> Post: mailto:R-390 at mailman.qth.net
>>>>> Unsubscribe: http://mailman.qth.net/mailman/options/r-390
>>>>
>>>>
>>>> _____________________________________________________________
>>>> R-390 mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/r-390
>>>> Help: http://mailman.qth.net/faq.htm
>>>> Post: mailto:R-390 at mailman.qth.net
>>>> Unsubscribe: http://mailman.qth.net/mailman/options/r-390
>>>>
>>>
>>> _____________________________________________________________
>>> R-390 mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/r-390
>>> Help: http://mailman.qth.net/faq.htm
>>> Post: mailto:R-390 at mailman.qth.net
>>> Unsubscribe: http://mailman.qth.net/mailman/options/r-390
>>>
>> _____________________________________________________________
>> R-390 mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/r-390
>> Help: http://mailman.qth.net/faq.htm
>> Post: mailto:R-390 at mailman.qth.net
>> Unsubscribe: http://mailman.qth.net/mailman/options/r-390
>>
>
> _____________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/faq.htm
> Post: mailto:R-390 at mailman.qth.net
> Unsubscribe: http://mailman.qth.net/mailman/options/r-390
>
>
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition. Version: 7.5.503 / Virus Database: 
> 269.17.4/1188 - Release Date: 12/17/2007 2:13 PM
>
>