[Lowfer] [600MRG] WG2XCT on until 04:00

[jrusgrove at comcast.net]

Pat

Your signal still coming in nicely.

For the past year or so I've been running a higher power version of the Class D amplifier on 137 and 
500 kHz on the website. It runs 4 FETs (2 FETs each side in push pull) at the 1 kW level. No more 
combining two amplifiers. There have been a number of changes over the original circuit ... 
improvements in the gate drive circuit, optimization of the output transformer using better core 
materials, better snubber design etc. In addition I've added a 'high speed' overload shutdown 
circuit that makes it 'virtually' impossible to damage the amplifier.  Will be doing a write it up 
in the next couple months.

Jay W1VD  WD2XNS  WE2XGR/2




----- Original Message ----- 
From: "pbunn" <pbunn at matrixei.com>
To: <lowfer at mailman.qth.net>
Sent: Thursday, November 08, 2012 8:13 PM
Subject: Re: [Lowfer] [600MRG] WG2XCT on until 04:00


> Thanks for the report  Jay. I hope to add some more radials this weekend.
>
> Also looking to get a linear amp going to do some digital work. Also am building a larger class D 
> amp based on your design. Thanks for making you technical stuff available.
>
>
> Pat
> N4LTA
>
> jrusgrove at comcast.net wrote:
>
>
> Pat
>
> See grabber 2 at http://www.w1vd.com/grabber.html .
>
> Jay W1VD  WD2XNS  WE2XGR/2
>
>
>
> ----- Original Message -----
> From: "pbunn" <pbunn at matrixei.com>
> To: <lowfer at mailman.qth.net>
> Cc: "600MRG" <600mrg at w7ekb.com>
> Sent: Thursday, November 08, 2012 5:59 PM
> Subject: Re: [Lowfer] [600MRG] WG2XCT on until 04:00
>
>
>> WG2XCT is operating on 497.00 KHz QRSS3 and CW from EM94bw. Running with a new Mean Well 
>> switching
>> power supply.
>>
>> Reports are greatly appreciated.
>>
>> Pat Bunn
>> N4LTA
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