[Amps] Plate choke resonanse and safe operation

[Carl]

I agree that a GDO is only an approximation. Try running the amp at 500W 
to start at 28.0 mHz and then feel the choke for excessive heat. Go up 
in 250W steps and check each time.

Of course be sure all safety rules are followed!

Carl
KM1H



----- Original Message ----- 
From: "OZ1AXG Flam" <oz1axg.nospam at dxmail.dk>
To: "Carl" <km1h at jeremy.mv.com>; <amps at contesting.com>
Sent: Sunday, December 07, 2008 6:06 AM
Subject: Re: [Amps] Plate choke resonanse and safe operation


> the RFC is Installed
>
> I will try to measure the resonans again. For 27 MHZ i did the 
> measurement 3 times. A grid dip meter is not the most accurate 
> instrument, so i will try it again. but how close is "safe" ? what 
> would the symptoms be at tuneup if resonans is close by ?
>
> Then old RFC fried (broke a wire) when i accendential tranmitted 125 
> watt (1/2 second) in the amplifier. Had forgotten to reduce the drive 
> before tuning :=(  This has happened before on other band - but this 
> was a first for 30 meters ...
>
> OZ1AXG Flam
>
> ----- Original Message ----- 
> From: "Carl" <km1h at jeremy.mv.com>
>
>
>> Is that installed or on the bench? That first one is too close for
>> comfort for 10M CW.
>
>
>
>