yes, calibrated dummy load
HP calibrated voltmeter
comm analyzer rated for HF use
Mike, WB8VGE
SunLight Energy Systems
The Heathkit Shop
http://www.theheathkitshop.com/
J e e p
o|||||||o
A man with one clock knows what time it is. A man with two clocks is never
sure.
On Apr 2, 2011, at 8:21 PM, Don Jones wrote:
> Power dB = 10LOG*(P1/P2).
>
> Question #1, do you have a calibrated volt meter? Might be useful to check
> your input voltage.
> Question #2, is your "50 ohm load" calibrated?
> Question #3, I am not familiar with the Motorola Comm Analyzer... Is it rated
> for HF freq's? It is my impression that the Motorola stuff is mostly VHF/UHF
> rated equipment.
>
> Peace,
>
> Don Jones ko7i
> Arlington, WA
>
>
> -----Original Message-----
> From: Mike Bryce [mailto:prosolar@sssnet.com]
> Sent: Friday, April 01, 2011 6:37 PM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] eagle
>
> I have access to a very expensive motorla comm analyzer. $50k, calibrated to
> traceable standards.
>
> My personal coaxial dynamic watt meter and if course a 50 ohm dummy load.
>
> So, I am not using an old radio shack CB watt meter, but calibrated RF test
> equipment.
>
> Mike
>
> Sent from my iPhone
>
> On Apr 1, 2011, at 8:59 PM, Richards <jruing@ameritech.net> wrote:
>
>> Hi Mike --- I fully sympathize with your point in your position. I
>> agree the rig should be as advertised.
>>
>> As I wrestle with the issue, myself – considering the tolerance issues
>> and the fact that meters don't really show full power necessarily, ...
>> I'm wondering how do you (i.e., we) know you (we) are only getting 85
>> W out when it is set for 100 W out ? If our meters are not fully
>> accurate, how do we know we are not getting something like 95 – 100 W
>> out when our meters say 85 – 90 W with a 10% accuracy swing?
>>
>> I'm not picking a fight and I'm not doubting you – I'm only wondering
>> how you reached the conclusion you are not getting 100 W as advertised.
>> How did you test your rig to demonstrate you are not really getting
>> the full output?
>>
>> ------------------
>> Happy Trails.
>> ======================= Richards / K8JHR =========================
>>
>> On 4/1/2011 8:02 PM, Mike Bryce wrote:
>>> I'll keep this short as two thumb typing is hard to do.
>>>
>>> I understand the electronic aspect of it as well as the tolerance and
>>> logarithm of real power in the real world.
>>>
>>> Please, please, please understand I KNOW that no one on the other end will
>>> know the difference.
>>>
>>> But, I paid almost $3000 for a radio that displays on the front panel 100
>>> watts output when the real power into a dummy load @13.9 volts @ the radio
>>> power connection I have 76 watts on 20 meters out of the box brand spanking
>>> new.
>>>
>>> This is NOT a 'simple adjustment-- no one will notice' problem.
>>>
>>> No one, not me, not you, should pay three grand and then need to crack the
>>> case open to adjust anything.
>>>
>>> This is not a 'no one can tell the difference problem,' this is a quality
>>> control problem.
>>>
>>> If the display on my brand new $3k Omni 7 says 100 watts, then by god the
>>> power output should be "close."
>>>
>>> 85 watts is fine, but the display should reflect the rf output of 85 watts
>>> (not lab gear, I know)
>>>
>>>
>>> With sore thumbs,
>>>
>>> Mike
>>>
>>> Sent from my iPhone
>>>>
>>>>
>>> _______________________________________________
>>> TenTec mailing list
>>> TenTec@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
>>>
>> _______________________________________________
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>>
>
>
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