[Test-Equipment] question

[J. Forster]

It was used with the A, N beacon system. One side of the heading you heard
Morse As, the other side, Ns. On the beam you heard a steady tone, the
result of ORing A & N in Morse.

-John

===============


> I used to use a WWII beam filter between by HQ110AC and headphones.
> Few people know what a Beam Filter is. They are passive sharp
> notch or bandpass filters. A three position switch that allowed it to be
> bypassed
>  or used as notch or bandpass filter.
> If I toldyou the labeling on the switch it would be easy to guess what
> they were used
> for.
>
> 73
> Bill wa4lav
>
> ________________________________________
> From: test-equipment-bounces at mailman.qth.net
> [test-equipment-bounces at mailman.qth.net] On Behalf Of J. Forster
> [jfor at quik.com]
> Sent: Sunday, December 13, 2009 2:21 AM
> To: Discussion of Electronic Test Equipment
> Subject: Re: [Test-Equipment] question
>
> There are other uses for filters than copying CW. If you want a CW filter,
> get a purpose built one. A CW filter is essentially useless in an
> electronics lab.
>
> -John
>
> ===============
>
>
>> Have a KH 3202 here and use it fairly often. Also have the manual and
>> could scan it if needed. There are definitely better CW audio filters
>> around these days but the 3202 should still give a good account of
>> itself as a low pass filter.  Its main advantage is the predictable
>> roll off characteristics in the various configurations in which it can
>> be used.
>> DaveB, NZ
>>
>>
>> ----- Original Message -----
>> From: <bonddaleena at aol.com>
>> To: <boatanchors at mailman.qth.net>; <test-equipment at mailman.qth.net>
>> Sent: Sunday, December 13, 2009 2:56 AM
>> Subject: [Test-Equipment] question
>>
>>
>>> Hi. It's time for "Ron's dumb question of the week"......
>>>
>>> I notice that on ePay, there are a lot of Krohn-Hite 'Band Pass
>>> Filters', at some pretty good prices (I suppose).  I have a K-H
>>> function generator and it is VERY well made and $.
>>> How would one of these filters work as an audio filter??
>>> Some have the ability to do both high pass and low pass at the same
>>> time, others let you choose one or the other. I have quite a few
>>> audio
>>> filters here, but thought that one of these K-H filters configured
>>> to
>>> cut off below, say, 700 Hz and above 750 Hz would make a heck of an
>>> audio filter for CW.
>>>
>>> Or would it?? It seems that can function from just a couple of Hz up
>>> to
>>> waaay beyond our hearing limit..
>>>
>>> thanks!!!!
>>>
>>> ron
>>> N4UE
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