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

[Ray]

David,
I'm all for trying new ways to do things.  But past experiences are a 
very good teacher.

Thus, I conclude it would take a very hefty piece of iron (ee; a quite 
large iron core choke, maybe 2) to make a low pass filter that would 
pass 2000 watts of 120VAC at 60 Hz and filter out the harmonics of such 
a inverter.  It could be done, but the economic reality is, it's not 
practical.  The initial results would also likely be problematic.
Ray, W4BYG

On 3/7/2013 8:52 AM, David wrote:
> 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 ! ? !
> **>
> **>
> **
> **
>
>


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