[Lowfer] Lowfer transmitter testing

[Pat Bunn]

Thanks Jay.

I did the initial testing with a dummy load at 300 watts with the variac turned down. I don't have a dummy load that can handle a continuous KW.

I'll replace the fets and try again with better monitoring of the drains. The drain voltages looked good at 300 watts with very little ringing. I didn't get a chance to look when I cranked up to 600 watts. 


Pat

Sent from my iPhone

On Aug 17, 2013, at 10:46 PM, <jrusgrove at comcast.net> wrote:

>> Anyone remember way type core that you used. I have some ferrite type 43 and 77 large cores as well as some other stuff.
> 
> 77 material if you want to cover 137 kHz and 500 kHz.
> 
> Jay
> 
> 
> ----- Original Message ----- From: "Pat Bunn" <pbunn at matrixei.com>
> To: "Discussion of the Lowfer (US, European, &amp; UK) and MedFer bands" <lowfer at mailman.qth.net>
> Sent: Saturday, August 17, 2013 10:14 PM
> Subject: Re: [Lowfer] Lowfer transmitter testing
> 
> 
>> Thanks all. I may try to put on together tomorrow. Since I hope to run at 1KW I will use a capacitive divider. Anyone remember way type core that you used. I have some ferrite type 43 and 77 large cores as well as some other stuff.
>> 
>> Pat
>> 
>> Sent from my iPhone
>> 
>> On Aug 17, 2013, at 10:05 PM, Steve <VE7SL at shaw.ca> wrote:
>> 
>>>> whether due to wind whipping the antenna around or a bird landing on the loading wires - boy is that fun! <poof>
>>> 
>>> 
>>> I just love watching the scope match on a windy night...it's almost as if the antenna system is alive and breathing.
>>> 
>>> Steve
>>> 
>>> 
>>> 
>>> 
>>> WEB - "The VE7SL Radio Notebook":  http://members.shaw.ca/ve7sl
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