On 9/10/2013 11:13 PM, Leigh Turner wrote:
Larry, the RF power MOSFETS to which I refer here are the VRF2933 devices
from Microsemi. Sometimes one can find surplus and NOS ST Micro SD2933 FETS
on eBay at low prices.
I've worked with semiconductors, since we've had semiconductor and in
the industry until 87. However, I have zilch for high power SS except
for repairing a few.
Looking at these devices, I'd expect to use 8 for a saturated output of
2400 watts, so I could back off along with a bit of negative feed back
for a clean 1500 to 2000 watts all day long.
I know this would make the splitters and combiners more complicated, but
that's about the extent of my knowledge, whether right or wrong.
I have so many projects going right now, I just hope to get the LM470 up
along with the antennas that go on it and the 100' 45G before cold
weather sets in.
73
Roger (K8RI)
4 of these rugged 300 Watt rated devices in parallel/push-pull will yield a
saturated output power of well over 1200 Watts. Six will comfortably yield
over the US legal limit.
73
Leigh
VK5KLT
-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Larry
Sent: Wednesday, 11 September 2013 10:48 AM
To: amps@contesting.com
Subject: Re: [Amps] Future of RF AMPS
On 10-Sep-13 5:51 PM, Leigh Turner wrote: using a readily available
multiplicity (6 devices in parallel/push-pull) of cheap 50V MOSFETS sourced
from the surplus market.
Leigh,
Exactly which cheap MOSFETS from what surplus market are you speaking of?
Larry - W7IUV
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