[AMRadio] Re: MFJ-815B Watt-Meter with AM


Brett gazdzinski brett.gazdzinski at verizonbusiness.com
Sat Feb 10 18:55:34 EST 2007


Do they do PEP readings?
PEP is nice to know, gives a real good indication
of the modulation.
I used to watch mine and knew I normally ran 
3.5 times carrier power when the modulation
was correct.
I had many transmitters that would NOT do
more then twice the carrier power without 
mods, the 32V3 was one.

Brett
N2DTS 

> -----Original Message-----
> From: amradio-bounces at mailman.qth.net 
> [mailto:amradio-bounces at mailman.qth.net] On Behalf Of D. Chester
> Sent: Saturday, February 10, 2007 3:02 AM
> To: amradio at mailman.qth.net
> Subject: [AMRadio] Re: MFJ-815B Watt-Meter with AM
> 
> Why not just use a plain old thermocouple rf ammeter?  I have 
> never seen two 
> "ham radio quality" rf output meters that read anywhere near 
> the same.  I 
> have an old Mirage, but I use it mostly as a SWR indicator.  
> It makes a good 
> relative power output meter, but on some bands it indicates over 90% 
> efficiency in the final, into a 50-ohm dummy load.  I know 
> the transmitter 
> couldn't be that efficient, so I take its readings with a 
> grain of salt.  I 
> trust the reading I get with my rf ammeter.
> 
> Don k4kyv 
> 
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