[Yaesu] Bird Wattmeter...

[Tom Ed Moore(k5bm)]

>From Troy, k5cbl

Tom, k5bm

Evening Tom,

I don't have any slug that is torn down to shoot some pictures, but hear 
goes some info...

1.) The meter is a 0-30 Ua movement....not standard to any replacement 
meter.

2.) The slug can be calibrated for what range you might want the slug to 
read...think there are 5-7 different slugs but calibrated to different power 
range...

3.)  You will need to remove the front plate....they used some type of glue 
like a rubber cement...I have taken a heat gun (depending on age of slug a 
hair dryer works) and heat the front plate and using a real thin screw 
driver (probably will damage or scar the alum plate where you lift it) just 
don't melt the slug (don't overheat) just enough to lift plate....

4.)  Under the plate you will see a 6-32 screw head and a hole and the hole 
will have a screw driver slot way down deep, use an insulated thin blade 
screwdriver.....seems like in the past the adjustment was a small pot (value 
depending on the slug) and some of the slugs the adjustment is a small 
variable cap....just can't remember if I ever wrote down which slug has 
what....

5.)  If the internal diode or in most a series resistor is burnt or open the 
white plastic on the end that is inserted into the Bird can be removed by 
using the thin blade screw driver again and pry it away from the 
element....the cap has a lip and pops or snaps back on if you haven't 
damaged it removing it...

6.)  When its removed you can see the resistor that is soldered to a loop 
that goes back into the element.....you will need to remove the 6-32 screw 
to go deeper where the diode is affixed to the resistor and variable 
pot....in doodle bug style....(hanging in the air)....I can't remember the 
diode I have used, seems like it was a 1n100 just can't remember but seems 
like most germanium diode will work....probably someone that really knows 
whats going on can specify the correct diode if needed....

Hope this will not get you in trouble...I had to destroy an old one to fix 
the others ...

PS broke slugs are cheap at ham fests....HI

Lots of luck.....73 Troy K5CBL










----- Original Message ----- 
From: "KBØNLY" <kb0nly at mchsi.com>
To: "Yaesu Reflector" <yaesu at mailman.qth.net>
Sent: Friday, July 30, 2010 7:07 PM
Subject: [Yaesu] Bird Wattmeter...


Anyone smart cookies here that know how to calibrate a Bird 6154?

Found the user manual online, no info there.  Searched for days and nothing. 
Posted on forums and other email reflectors, nothing.

Anyone???

Scott

______________________________________________________________
Yaesu mailing list
Home: http://mailman.qth.net/mailman/listinfo/yaesu
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Yaesu at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html