[Mobile-Portable] 2000 Watt Inverter Modified for 65 volt Mobile RF Transistor Amplifier???

[David]

Hi Randy, thanks for the reply. I did not know these were available. Are
they expensive?

David B.
W7DBH



** For powering my Henry SS 1200 I purchased a SEC America model 695CE 13.8v
** to 28v @ 55 amps dc - dc converter.. SEC America produces dc- dc
** converters rated at higher voltages. The voltages can be internally
** adjusted up or down a few volts beyond it's stated output if needed. .
** Just FYI , Randy N5WV
**
** ----- Original Message -----
** From: "David" <iam at pmug.org>
** To: "Mobile-Portable Reflector" <mobile-portable at mailman.qth.net>
** Sent: Thursday, March 7, 2013 7:52:35 AM
** Subject: Re: [Mobile-Portable] 2000 Watt Inverter Modified for 65 volt
** Mobile RF Transistor Amplifier???
**
** Yes, Ray, that's a real possibility. But, perhaps a few smart Hams could
** possibly overcome it...I never say die until all avenues have been
** thoroughly explored.
**
** Then there is always the idea/possibility of using a slightly modified
** automobile alternator as a source for tinkering toward the same end...to
** provide ~65 VDC power to big RF transistors. (the 12 volters are expensive
** and touchy, I think)
**
** David B.
** W7DBH
**
**
** ** Be aware that typical DC to AC Inverters in that price range usually
** ** utilize a square wave or stepped (sometimes called modified), square
** ** wave switching. It would likely be far to noisy in the RF bands to be
** ** useful.
** **
** ** Sinewave inverters for that power level are available for commercial
** ** applications, requiring low RFI emissions. They usually cost a great
** ** deal more.
** ** Ray, W4BYG
** **
** **
** ** On 3/6/2013 3:26 PM, David wrote:
** **> ** On 03/06/13 10:34, David W7DBH wrote:
** **> **
** **> **> Use 2000 Watt 12VDC to 120VAC Inverter Modified for 65 volt Mobile
** **> RF
** **> **> Transistor Amplifier???
** **> **
** **> **> It has been my thought for a long tome that a 12VDC to 120VAC
** **> Inverter
** **> **> of
** **> **> a proper capacity could be modified for use as the power supply
** for
** **> RF
** **> **> Transistor Mobile Amplifiers.
** **> **
** **> **> You know, get it to run at ~65-70 Volts AC, ... and rectify &
** filter
** **> it.
** **> **>
** **> **> Seems like it might be easy-peasy for a more engineer-type Ham to
** **> do.
** **> **
** **> **> And, right now Harbor Freight has a coupon for their 2000 Watt
** **> **> continuous
** **> **> (4000 watt peak) Inverter ---for only $130!
** **> **
** **> **> Perhaps this could be a helpful way to get a KW in my/your car????
** **> **
** **> **> What do y'all think?
** **> **
** **> ** I think a 120 to 70 Volt transformer with and a rectifier and some
** **> ** capacitors would be a more foolproof way to do it with little
** **> efficiency
** **> ** loss.
** **> ** I did not say a regulated power supply.
** **> ** Unless you are competent at designing and building them you won't
** **> be
** **> ** competent at modify them.
** **>
** **>
** **> Thanks for your reply, Ron.
** **>
** **> I did think of using such a transformer. But in the old days I used to
** **> wind power and modulation xmfrs for myself...the iron core for a KW+
** **> capacity would be pretty big/heavy. BUT (idea!) maybe someone has
** **> experience using the new donut cores...and they could possibly be
** **> smaller/lighter for the same capacity?? I don't know very much about
** **> them...
** **>
** **> Help ! ? !
** **>
** **>
** **
** **
**
**