[AMRadio] Modified sine wave to sine wave

[W2XJ]

A high Q 60 hertz tuned circuit works quite well

On 5/1/12 8:18 AM, Bernie Doran wrote:
> There could be all sorts of issues here.  might be better to use  an in line
> filter on the output. It is all going to depend on what the noise
> frequencies really are.  I assume they are high enough to bother HF
> receivers. If so that sounds like a  a high perm toroid with  a few turns
> and bypass caps on each end.  And of course shielding. might even be on the
> battery leads.
> ----- Original Message -----
> From: "Jim Isbell, W5JAI"<jim.isbell at gmail.com>
> To: "Discussion of AM Radio in the Amateur Service"
> <amradio at mailman.qth.net>
> Sent: Tuesday, May 01, 2012 10:11 AM
> Subject: [AMRadio] Modified sine wave to sine wave
>
>
>> I have a modified sinewave inverter.  I want to get rid of some of the high
>> frequency noise in the AC.  It occured to me that running the output
>> through a 1:1 transformer with a capacitor across the primary might smooth
>> out the bumps.  Any comments?
>>
>> Jim Isbell
>> TheFreeRepublicAt.WordPress.com
>> www.youtube.com/watch?v=BFtoaMM1ChY&feature=related
>> www.youtube.com/watch?v=dyjJ3Fw0nSQ
>> www.facebook.com/profile.php?id=100000010609777
>>
>> Beware the man who only carries one gun. HE PROBABLY KNOWS HOW TO USE
>> IT!!!
>>
>>
>>
>>
>> On Mon, Apr 30, 2012 at 10:51 PM, Geoff<w5omr at att.net>  wrote:
>>
>>> On 4/29/2012 10:48 AM, kc9cdt at aol.com wrote:
>>>> Geoff,
>>>> Thanks for all the help.
>>>> Well,
>>>> I guess I can meter the primary of the Mod XFMR...if it's open that
>>>> should be obvious.
>>> Well, either open or shorted.  Come to think of it, a shorted
>>> transformer would cause a much higher current reading.  Make sense?
>>>
>>>> OK, I have a handle on a old Viking II...is the mod XFMR the same...if
>>>> it is, I can get it cheap.
>>> The Interstage audio Driver transformer, I believe, is the same in the
>>> Ranger and the Viking II.
>>> Neither of 'em are much bigger'n a walnut (so it seems)
>>>
>>>> Maybe I should adj the resistor just to see if it helps?
>>>> If the resister is open...would that cause the high current?
>>>>
>>> The sliding tap resistor is what sets the screen voltage.
>>> Be very careful when sliding that tap... best to remove all stress from
>>> the 'slider' and don't slide it at all, rather open it up, place it
>>> where you want it, then re-secure it and measure.
>>>
>>> -Geoff/W5OMR
>>>
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