Hi All,
I did the X2/X5 Range Switch Modification on my Bird 43 about six months ago.
Since I did the deed I have not suffered from cough due to cold, any hang nails
or suffered from malnutrition. I realize that these things "COULD" happen but
the likelihood is an acceptable risk. We have to remember that the Bird 43
isn't an extremely accurate measurement tool to begin with nor is it designed
to be one. It makes for good subject matter but is it realistic to dissect it
to this degree?
Dail
N6DGT
.
----- Original Message ----
From: Gary Schafer <[EMAIL PROTECTED]>
To: Repeater-Builder@yahoogroups.com
Sent: Friday, August 17, 2007 8:43:37 PM
Subject: RE: Re: [Repeater-Builder] Bird Wattmeter X2/X5 Range Switch
Hi Don,
Yes the slug could be damaged because
there is tighter coupling to the line in low power slugs compared to high power
slugs. I don’t know how much over current/ over voltage the diode and
other parts in the slug can withstand however.
The meter movement can also be damaged by
switching to read forward power with the low power slug.
If you look at a chart in the bird manual
that shows typical bandwidth of different slugs you will see that the higher
power slugs have a wider bandwidth than the lower power slugs. The tighter loop
coupling in the low power slug contributes to narrower bandwidth.
73
Gary
K4FMX
From: Repeater-Builder@ yahoogroups. com [mailto: Repeater-Builder@
yahoogroups. com ] On Behalf Of Don KA9QJG
Sent: Friday, August 17, 2007 5:29
PM
To: Repeater-Builder@ yahoogroups. com
Subject: RE: Re: [Repeater-Builder]
Bird Wattmeter X2/X5 Range Switch
Great info Gary , I have a similar Question My Repeater puts out 100
Watts So of Course I can use a 100Watt Bird Slug to read the out put ,
but if You reverse it to keep an Eye on the SWR it would take a Few
watts of Reflected to see it , So if I would use a 5 Watt Slug in the Reversed
Position I would get Better View SWR Reading
But if I accidentally put the Slug to read FWD Output It would Pin the
Meter ,
but are You saying the Slug itself can be damaged
Thanks Don
KA9QJG
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