[Amps] 120 Hz hum, LC filters

[John Lyles]

There is some information here from the old GE Ham News, on power supply
dynamic regulation, on the AM Window:

http://www.amwindow.org/tech/htm/tutor.htm

Also a paper by Wallace Walhgren of the former Electro Engineering, now 
Stangenes Transformers, on transmitter performance without filter chokes.

73
John
K5PRO

> Message: 6
> Date: Sun, 21 Feb 2010 17:02:03 -0500
> From: "Gary Schafer" <garyschafer at comcast.net>
> Subject: Re: [Amps] 120 Hz hum from Henry...
> To: "'Carl'" <km1h at jeremy.mv.com>, <dezrat1242 at yahoo.com>,
> 	<amps at contesting.com>
> Message-ID: <20100221220153.E793A1B60933 at dayton.contesting.com>
> Content-Type: text/plain;	charset="us-ascii"
> 
> The choke will improve the "static" regulation but will kill the dynamic
> regulation.
> Hook a scope up to the HV and run some CW with your key. You will see
> negative spikes in the HV. Same on SSB.
> 
> 73
> Gary K4FMX