[Boatanchors] Electronic T/R Switch

[Bob Macklin]

I thought that might be the problem. I have seen many units over time that
had the same problem.

I remember some early solid state stuff that had heat problems because if
inadequate ventilation. the designers thought that because there were no
heaters no ventilation of fans were needed! LOL!

Bob Macklin
K5MYJ
Kent (Seattle), Wa,
"Real Radios Glow in the Dark"

----- Original Message ----- 
From: "rbethman" <rbethman at comcast.net>
To: <boatanchors at mailman.qth.net>
Cc: "Bob Macklin" <macklinbob at msn.com>; <w8au at sssnet.com>
Sent: Wednesday, November 05, 2008 11:49 AM
Subject: Re: [Boatanchors] Electronic T/R Switch


> Bob,
>
> The heat is generated by the circuitry inside, not by the RF.  They get
> just as hot simply sitting on with the coax attached.
>
> The cabinet is fairly tight around the components, with very little
> holes that do not allow for much ventilation.
>
> A 12VDC muffin fan sitting on top, OR a 120VAC muffin with a dropping
> resistor to reduce the speed will be immensely helpful.
>
> Bob - N0DGN
>
> Bob Macklin wrote:
> > Where does the heat come from? I hopes it's not the Tx RF!
> >
> > Bob Macklin
> > K5MYJ
> > Kent (Seattle), Wa,
> > "Real Radios Glow in the Dark"
> >
>
> -- 
> Bob - NØDGN
>
>