[BC] bird smaple thing...

[Alan Alsobrook]

Burt,
I bought one on a happen chance and have been trying it out.. It's 
worked great. I got a Bird 4274-025 and have used in 3" line up to 25 KW 
without any problems or degradation. I know it shows it's rated at 500W 
but I think that rating is just due to the limitation of the Bird 43 
line section.  I swept it in both a 1 5/8" section and a 3" line 
section, and found it to have a flat +-3db frequency response from 25 
Mhz - 1 GHz. It must have some sort of frequency compensation in it. I 
called and talked with bird to see if I could get an estimate of how 
much power was safe to use it with (thinking there must be a freq. comp 
in it) and they were unable to give me an answer. The Coupling is not as 
  close as you want. I think it was -63db in the 3" section and -57db in 
the 1-5/8 line section. (that's going from memory I do have the actual 
sweep runs recorded) the the exact coupling values my be slighting 
different. but either way it's not the -50 as stamped on the plug and 
it gets less as the line size get larger. I was also surprised that even 
though the pickup is T shaped (they put on a transparent covering so you 
can actually see the element on this one), their seemed to be no effect 
   as it was rotated.

It's the last item on this page.
https://tessco.com/products/displayProducts.do?groupId=470&subgroupId=10

PS.. I'm keeping mine!! :)

Burt I. Weiner wrote:
> Speaking of which, I'm looking for a Bird "Sniffer" for the FM band.  

-- 
Alan Alsobrook CSRE AMD CBNT
St. Augustine Fl. 32086 904-829-8885
aalso at Bellsouth.net