[Lowfer] Lowfer transmitter testing

[John Langridge]

What I have really enjoyed about the scope match is that you can monitor real time excursions in impedance, whether due to wind whipping the antenna around or a bird landing on the loading wires - boy is that fun! <poof>

I use an analyzer to get the system setup but once its taken out of line, aside from gross variations that show up on the base current meter or even on the drain current for the PA power supply, I would be blind to up-to-the minute antenna status without the scope match...

Anyone every used the concept for an autotuner to automatically touch up the match?

While your original question was not directed at me, I will just mentioned that I am using the capacitive divider here and current and voltage sensors seem quite happy and have been trouble free since I installed the system at the beginning of 2013.

73,

John KB5NJD/WG2XIQ




________________________________
 From: Pat Bunn <pbunn at matrixei.com>
To: "Discussion of the Lowfer (US, European, & UK) and MedFer bands" <lowfer at mailman.qth.net> 
Sent: Saturday, August 17, 2013 8:50 PM
Subject: Re: [Lowfer] Lowfer transmitter testing
 

Been using a Rig Expert and had very good luck with it for tuning the variometer and building matching networks. 

Are you using a capacitive divider in your or a transformer divider?

Pat

Sent from my iPhone

On Aug 17, 2013, at 9:22 PM, Steve <VE7SL at shaw.ca> wrote:

> Pat - if you haven't yet built the 'scope-match' I would highly recommend that it goes to the top of your project list. It is really one of the most valuable pieces of equipment in the shack and you will never have to worry about impedance mismatch or being off-resonance ever again!
> 
> Steve / 73
> 
> 
> 
>> Not sure what happened. Was running cool at about 15 amps at 40 volts  and then one get blew up in a small ball of fire. May have been the antenna .
> 
> 
> 
> 
> WEB - "The VE7SL Radio Notebook":  http://members.shaw.ca/ve7sl 
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