What is a suitable replacement for the Bird Termaline 6104 wattmeter?

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The 6104 was an absorption wattmeter that covered the frequency range from 25-512MHz and power up to 60W.  The meter was detachable from the load and connected by a 3-1/2 ft cable. 

There is no direct replacement for the 6104 but I would recommend using a 4304A wattmeter. It has a fixed 25-1000 MHz, 5-500W element with switchable scales.  I would also recommend our 8135 oil cooled load (150W).  Click on the links below for details.

4304A Wattmeter

8135 Oil-cooled load