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Re: Microwave Oven at 2450 Mhz



Magnetrons are used for FM links where power is needed. The use of
circulators to inject a locking signal is required, some systems lock a low
power magnetron which in turn locks a high power one. Klystrons are still
used UHF television broadcasting. Klystron can be amplifiers, or oscillators
( reflex klystrons) . Klystrons and traveling wave tubes (TWT) are linear,
and the traveling wave tubes typically offer the advantage of 40 to 50 dB of
gain. Inefficiency in TWT's make Klystrons desirable in the over 200 W level
because of power disipation and cooling isues.
Solid state amplifiers today fill a need in the low to medium power
microwave region, but tubes still provide the power to cook things,
intentionally and unintentionally!.

Art, KC6UQH
----- Original Message -----
From: "Luc Leblanc VE2DWE" <luclebla@sorel-tracy.qc.ca>
To: <amsat-bb@amsat.org>
Sent: Sunday, February 20, 2005 7:42 AM
Subject: Re: [amsat-bb] Microwave Oven at 2450 Mhz


> On 20 Feb 2005 at 6:38, M. K. Hess wrote:
>
> > I've often wondered if the Klystons & Magnetron tubes from old microwave
> > ovens are at all useful in constructing a 13cm transmitter. Any thoughts
on
> > that?
> >
> > N3EAQ
> > 73
>
>
> I remember some post on some Wifi BB where some report tests to boost
> wireless routers signal using microwave components. Main problems
> reported where:
>
> Instability, spurious harmonics, not filtration or isolation from
> square waves.  In short it seems to be very hard to make these tubes
> working as an amplifier on 2.4GHZ.
>
>
>
>
> "-"
> Luc Leblanc VE2DWE
> Coordonnateur AMSAT Quebec coordonnator
> AMSAT 33583
> www.qsl.net/ve2dwe
> ----
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----
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