I would be curious to see how these LDMOS devices perform. Has
anyone any data on the M2 boxes they sell for 6 and 2 ?
An HF Amp, using one or two of these devices would be very interesting.
73, Dick, W1KSZ
On Sat, Oct 26, 2013 at 1:05 PM, Jim Brown <jim@audiosystemsgroup.com>wrote:
> On 10/26/2013 12:34 PM, Richard Solomon wrote:
>
>> That just shows the failings of SS Amps. A 1.3:1 SWR equates to 1.7%
>> reflected power. Any
>> Amp that can't handle that has no place in my shack.
>>
>> As for tube amps, just shows the benefits of a tuneable Pi-Network.
>>
>
> My neighbor K6XX, the engineer at Elecraft who put the KPA500 into
> production and has done extensive testing of many competing amplifiers,
> observes that the IMD produced by a solid state power amplifier rises
> rapidly with a mismatched load, and also when operating too close to its
> limits. To prevent this, the firmware in the KPA500 limits power output,
> and also causes it to fold back with SWR around 2:1. Both of us run tube
> amps for contesting.
>
> 73, Jim K9YC
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