my first sypply was a Pyramid ... never again.... it lost regulation...
23 volts into the 746.. Icom must build em good because the only damage
was, it let the smoke out of the driver transistors.. a few dollars to
rf parts fo a new matched pair of transistors and she was purring
again.. running off a astron supply..
Joe Serocki wrote:
> On the same note, let's all talk power supplies. I have used many, but
> Pyramid seems to be very popular. I have had a couple, and they all used
> 2N3055's as the finals. However, they are set up in parallel, not well
> matched, and if one shorts it dumps full voltage, about 18-20 volts, to the
> radios because they didn’t have a crowbar or shutdown circuit. Found that
> out the hard way. It was cool how bright the displays on the radios got :)
>
> Joe Serocki
> N9IFG
> www.welcars.org
> www.stonedmonkey.org
> www.tke-nu-iota-alumni.org
> www.venturecrew743.org
> www.foxlaketroop85.org
> www.ayso428.org
> IRLP Node 4239
>
> If you don't like it SPIN THE DIAL!
> Quando omni flunkus moritati!
> America is returning to the values Scouting never left.
>
>
> -----Original Message-----
> From: vhfcontesting-bounces@contesting.com
> [mailto:vhfcontesting-bounces@contesting.com] On Behalf Of MICHAEL SAPP
> Sent: Tuesday, May 20, 2008 11:21 PM
> To: VHF TEST REFLTR
> Subject: [VHFcontesting] Nuking
>
> Nuking = The tendancy for Mirage amplifiers to break into full power
> oscillation when presented with an output impedance load of anything other
> than 49 to 51 ohms resistive. Owned one once. Never again. WA3TTS
> _______________________________________________
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>
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>
>
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