[AMRadio] watt meter


Rick Brashear rickbras at airmail.net
Wed Mar 1 17:39:32 EST 2006


This is just a guess, but a lot of older watt meters used 1N60 diodes.  
The inductor is most likely in the 250 - 275 uh range. 

73,
Rick/K5IZ

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>
>>
>> What is everyone doing for a watt meter?
>> My swan wm-3000 blew up last weekend, it reads no pep
>> and about 1/4 of the correct average power.
>> I could fix it if I could find out what diodes they used (3 gone),
>> and one of the little inducters broke, but it
>> would not be calibrated.
>> It was a good meter, 4 scales going up to 2kw, real pep
>> reading, large meter, but its toast.
>>
>> Looking around, not much out there that does high continuous power,
>> real pep readings, looks good, etc.
>> I went to ham radio outlet in Delaware today (working close by) and
>> despite waiting for almost an hour, could not get much help.
>> They would not let me open a box of a daiwa meter, and I hate the cross
>> needle meters anyway, they had a diamond, not true pep, but I
>> could not look at that, they wont unseal a box unless you buy it.
>> That and the poor service had me walk out of the store
>> vowing never to buy anything from them, ever.
>>
>> Some web searching turns up CB type meters, not good at lower
>> frequencies, or discontinued units.
>> Nye viking used to make a good one, but not anymore.
>>
>> The 813 rig can do well over the 1500 watt pep level,
>> well over 2000 watts pep with the neg cycle loading
>> deck hooked up, so I need something good for the power.
>> MFJ makes one, but the manual shows its only good for
>> 500 watts 100% duty cycle, 600 or 700 watts of carrier means
>> 90 second transmissions (how cheap that mfj stuff is).
>>
>> Not much on ebay but old heathket meters...
>>
>> Brett
>> N2DTS
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