Suddenly you're talking about solid state ham rigs; nice try--do you
have fans on everything? That question makes just about as much
sense. Are you working on a design for a 1000 amp production run or
a one time deal for your shack? Spare me the "good engineer" stuff.
If you want to make everything on the cheap and fan cooled and pretend
you work for MFJ knock yourself out. I'd say if a transformer is
getting as hot as an uncooled MOSFET PA on the back of a plastic
radio, it has a problem and a fan isn't the answer. Do you have a
heat sink on your H.V. plate supply transformer?
Of course, this is also an opinion.
73
Rob
K5UJ
On Thu, Feb 21, 2013 at 1:54 PM, Bill Turner <dezrat1242@yahoo.com> wrote:
> ORIGINAL MESSAGE:
> On Tue, 19 Feb 2013 19:52:14 -0600, Bob wrote:
>
>> My point
>>was that if you have the B+ supply transformer sitting somewhere and
>>it gets so hot it has to have a fan on it, then it isn't big enough.
>
> REPLY:
> Ok, that's your opinion, not a universal design rule.
>
> One could make the same argument for any device that has a fan. Your
> transceiver probably has a fan. Does that mean your transceiver isn't big
> enough?
>
> These are design tradeoffs that engineers get paid big bucks to make in the
> most efficient way. Any fool can slap a bigger part in the circuit and hope
> for the best. A good engineer knows exactly what he's doing and why.
>
> Bill, W6WRT
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