Fw: Fw: Re: [HomeBrew] YC156 amplifier website

Mon, 4 Mar 2002 18:57:02 -0600

--------- Forwarded message ----------
From: Sandy and Kees Talen <[email protected]>
To: [email protected]
Date: Mon, 4 Mar 2002 18:34:42 -0600
Subject: Fw: Re: [HomeBrew] YC156 amplifier website
Message-ID: <[email protected]>

Boy, that took me a while........

db=10 log P1/P2
15=10 log P1/P2
1.5=log P1/P2
1.5=log 32
power ratio is 32
100W in would give 3200W out
but at 70% it's 2240W ......if you believe the numbers
   I doubt if it's that high. 

What took a while....Scientific Calculator has dead batteries, I don't
have
a spare battery, look for "no batteries required" calculator...my K&E
LLDD
slide rule,  can't find slide rule, dig up my CRC handbook ....wait a
minute
.....dig out my old old TI SR-50 Calculator, dead nicads, replace the
nicads 
with AA batteries which I do have (4.5V vs 3.6V...oh, well)....old TI
SR-50 
from 1970 still works.

Good thing to come of this ...my SR-50 works again.

73s  Kees K5BCQ

--------- Forwarded message ----------
From: "doc" <[email protected]>
To: "Ham - Homebrew" <[email protected]>
Date: Mon, 4 Mar 2002 18:19:49 -0500
Subject: Re: [HomeBrew] YC156 amplifier website
Message-ID: <054f01c1c3d3$14b05220$[email protected]>
References: <[email protected]>

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Tim or someone ...

   Please help me out here.

   Gain: 15 dB, efficiency 70%, 100watts drive ... output = ??

   Just curious and my math is poor

   Sure looks gorgeous!

Thanks! & 73, doc KD4E
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

> Hello homebrewers
> In my quest to find information on homebrew amplifiers I came across
this
site
> and thought it might be of interest to the group:
>
> http://www.angelfire.com/darkside/rfbox/
>
> 73, Tim

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