[Test-Equipment] Bird Termaline Question

[Richard Knoppow]

     Its possible but, for instance, my Motorola load measures about 55 
ohms DC. I've measured it with an RF bridge (actually two bridges) and 
find its not reactive and measures about the same at any RF frequency. I 
think its just damaged from overload.
     At least one Bird load consists of a glass resistor plated with 
metal. This one is oil cooled. I think my Motorola is similar.
     I have also had two MFJ dummy resistors go bad. These are supposed 
to be about  50 ohms and were when new but went up to about 55 ohms. 
Neither was overloaded.

On 2/4/2017 2:12 PM, Kc9gsm - Yahoo via Test-Equipment wrote:
> Maybe it is not a pure resistive load but rather a reactive load so on DC it is 73.5 ohms but on RF it might measure closer to the 50 ohms you expect. Just my opinion.
>
> Regards,
>
> Dick Caliendo, KC9GSM ..............
>
> Sent from my iPad
>
>> On Feb 4, 2017, at 14:17, Doug Hensley <w5jv at hotmail.com> wrote:
>>
>> I just received what was supposed to be and what certainly looks like a NOS (new old stock) Bird Termaline dummy load.  The label is marked 150 Watt, 50 Ohm.
>>
>>
>> When I put my Fluke meter on it, it measures 73.5 ohms.  Not the kind of response I get from my old Heathkit cantenna nor my OHR RFL-100 which is like 50.1 ohms.
>>
>>
>> Has anyone seen this problem or heard about it?  Could Bird have made a mistake or could the vendor have swapped labels?
>>
>>
>> Thank you,
>>
>>
>> Doug W5JV
>>
>>
>>
>>
>>
>>
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL