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Hello Markus and Rick!
I have only just acquainted myself with your
messages.
(Just going out from hospital, big blood pressure
problem...)
Thanks a lot for precious information, of what make
fun still!
I recovered some ferrites N87 types which should
work in 137 KHZ.
Another subject interests me, it is the possibility
of transmitting with a big spool of several turns (a bit as WD2XDW).
But EIRP is much weaker than with a vertical aerial, then it is necessary
to "push more" in power!
VY 73: Jeff
----- Original Message -----
Sent: Friday, July 03, 2009 10:07
AM
Subject: Re: LF: Re: IGBT in 136 KHz
TX?
Jeff, Marcus,
STGW30NC60WD has a turnoff delay of 120ns.
Turn on delay and rise / fall times are better than 30ns.
That should be
good enough for 137kHz, maybe even for 500kHz.
It further has a max.
Collector-Emitter Voltage of 600V, max. Collector Current of 60A
(200A pulsed), max.. dissipation of 200W and a saturation voltage of 2V
(@20A).
Looks like a good "workhorse" for those who want to
experiment with IGBT's.
73, Rik ON7YD - OR7T
At 22:05
26/06/2009, you wrote:
Dear
Jeff,
havn't actually tried it myself on
137 kHz. But from past experience I'd say that while IGBTs may have less DC
loss, they are much slower (especially during turnoff). They can be used as
effient switches at some tens of kHz, whereas MOSFETs will easily go up to
several MHz.
Kind regards,
Markus,
DF6NM
- ----- Original Message -----
- From: F6CWN
- To: [email protected]
- Sent: Thursday, June 25, 2009 11:37 PM
- Subject: LF: IGBT in 136 KHz TX?
- Good night to all,
- Anybody would have any experience on the use of IGBT in
136 KHz amplifiers?
- Thanks in advance!
- 73: Jeff / F6CWN
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