[Mobile-Portable] 2000 Watt Inverter Modified for 65 volt Mobile RF Trans...

[N1KHB at aol.com]

What was the desired end result here? I never did see the original request  
for info.
 
Best,
Sonny N1KHB
 
 
In a message dated 3/7/2013 4:54:54 P.M. Eastern Standard Time,  
n5wv at comcast.net writes:

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 ! ? ! 
**> 
**>  
** 
** 


-- 
David B.  

______________________________________________________________  
Mobile-Portable mailing list 
Home:  http://mailman.qth.net/mailman/listinfo/mobile-portable 
Help:  http://mailman.qth.net/mmfaq.htm 
Post:  mailto:Mobile-Portable at mailman.qth.net 

This list hosted by:  http://www.qsl.net 
Please help support this email list:  http://www.qsl.net/donate.html  
______________________________________________________________
Mobile-Portable  mailing list
Home:  http://mailman.qth.net/mailman/listinfo/mobile-portable
Help:  http://mailman.qth.net/mmfaq.htm
Post:  mailto:Mobile-Portable at mailman.qth.net

This list hosted by:  http://www.qsl.net
Please help support this email list:  http://www.qsl.net/donate.html