That's hardly believable. How was it measured? a Bird wattmeter accuracy is
only +- 5%. A network analyzer or a TDR in return loss mode (Bird SA-6000 or
Anritsu equivalent) would be required to measure this accurately.
Not to mention, the number of 75 Ohm adapters in the string shown.
73
Jim W7RY
--------------------------------------------------
From: "Steve Hunt" <steve@karinya.net>
Sent: Saturday, January 14, 2012 9:15 AM
To: <towertalk@contesting.com>
Subject: Re: [TowerTalk] PL259 Insertion Loss?
> Not a direct answer to your question, but from Dan's (N3OX) web site:
>
> http://n3ox.net/files/23_adapters_28400kHz.jpg
>
> 23 connectors/adaptors including UHF types, 0.08dB loss on 10m
>
> 73,
> Steve G3TXQ
>
>
>
>
> On 14/01/2012 16:59, Tony wrote:
>> All,
>>
>> I've always assumed that UHF connectors had negligible insertion loss
>> below 30MHz, but I recently spotted a couple of quotes on the web that
>> put losses between 0.3 and 0.5db @ 30Mhz. If that were the case, the
>> cumulative effect of a typical installation with 6 to 8 connectors would
>> not be so negligible, especially on 10 and 12 meters.
>>
>> I was wondering if anyone has done any tests of their own or if they
>> know of a reliable source on the web for this kind of data? Another
>> thing that comes to mind is whether there is any additional losses
>> associated with UHF crimp-on connectors?
>>
>> Thanks,
>>
>> Tony, K2MO
>> _______________________________________________
>>
>>
>>
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>>
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