[Boatanchors] OT a bit: decent possibility for Bird dummy load
rgroh at swbell.net
Mon May 16 10:24:48 EDT 2011
I found a listing for a damaged (output connector broken off) Bird 75W 30 dB
attenuator on eBay and thought that I might mention it to my fellow hams as a
possibility for a very nice dummy load. Some of you may not know that any
large, well designed attenuator (e.g. greater than 20 dB attenuation) makes a
pretty darned good dummy load. In fact, I have a 30 dB 100W Bird that I am
using myself as a dummy load. Fairly compact, no oil, flat to 2 GHz - what is
not to like.
The eBay item # is 250819745325.
By the way, I have no connection with this item or with the seller. I did
check with the shop that is selling it and they did a quick check and it does
read 50 ohms on the input connector so it looks like the damage to the output
would not affect it's suitability as a load.
Another note: the 75W power rating (or xx power rating on any Bird attenuator or
load) is a key down, 100% duty cycle rating. The ratings for lower duty cycles
(e.g. CW at 50%, SSB at ?? 25%) are proportionally larger. There is a limit but
it is apparently quite high.
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