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Subject:
Re: need formula
From:
Brett Winchester <[log in to unmask]>
Reply To:
Blind-Hams For blind ham radio operators <[log in to unmask]>
Date:
Fri, 1 Feb 2002 12:30:00 -0700
Content-Type:
text/plain
Parts/Attachments:
text/plain (71 lines) 
see my second message as for some reason the numbers got stripped with the spell checker.  I sure  wish I could get it to read the misspelled word in context but sometimes the error is not even on the message Payne.  


Thank You!

BRETT K WINCHESTER  PM  KD7JN

[log in to unmask] 
http://www.icbvi.state.id.us/brochure/RADIO.HTM 

VOLUNTEER & READING SERVICES MANAGER
IDAHO COMMISSION f/t BLIND & VISUALLY IMPAIRED - ICBVI
P O BOX 83720
341 W WASHINGTON 
BOISE IDAHO  83720-0012

208-334-3220 ext 104 +7 = voice mail
fax  208-334-2963
Member IAAIS International Association of Audio Information Services

>>> Steve <[log in to unmask]> 02/01/02 11:52AM >>>
    Hi Bret,

If I recall my old theory, you neeed to know where the losses occur.  So,
you have a 50-Watt output, but you have -3 Db loss in the transmission line
and duplexer.  This reduces your power considerably at the antenna before
you apply the one Db. gain.

I think my old license book had tables to apply the logarithmic formula for
power as well as voltages based on decibel equivalents.

----- Original Message -----
From: "Brett Winchester" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, February 01, 2002 12:04 PM
Subject: need formula


I am working on the extra and a question on decibel got our local tech net =
going last night. =20

If you have a transmitter with a 50 wat output a db -3db and db loss in =
transmission lines duplexers and combiner with an antenna with a db gain, =
what is your output in watts?

Can anyone tell me how to solve this step by step.  I assume you integrate =
the losses and gains for a total system gain of 2db but am not sure how to =
plug that into the formula.

Can you convert all to logs and vis versa to make the problem simpler?




Thank You!

BRETT K WINCHESTER  PM  KD7JN

[log in to unmask] 
http://www.icbvi.state.id.us/brochure/RADIO.HTM=20 

VOLUNTEER & READING SERVICES MANAGER
IDAHO COMMISSION f/t BLIND & VISUALLY IMPAIRED - ICBVI
P O BOX 83720
341 W WASHINGTON=20
BOISE IDAHO  83720-0012

208-334-3220 ext 104 +7 =3D voice mail
fax  208-334-2963
Member IAAIS International Association of Audio Information Services

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