[ARC5] [armyradios] Re: [Vintage-Military-RADAR] 800 Hz Static Inverters

[Peter Gottlieb]

I have done this with limited success. The problem is voltage regulation but if you have a more or less constant load a 12 vac filament transformer gets you up to 120 vac 


Peter

> On May 23, 2014, at 5:10 PM, "Tim timsamm at gmail.com [armyradios]" <armyradios at yahoogroups.com> wrote:
> 
> Someone once suggested getting hold of one of those KW-Class audio amps used to blow the windows out of Toyota's.  Feed it with an X00 cps sine wave generator.  The load would be pretty "low impedance" and it might work in principle. Of course amplifier Class A operation would be very inefficient, maybe Class B, P-P could be an option.
> 
> Conceptually, would this work?
> Tim
> N6CC
> 
> 
>> On Fri, May 23, 2014 at 5:02 PM, 'J. Forster' jfor at quikus.com [armyradios] <armyradios at yahoogroups.com> wrote:
>>  
>> > On 5/23/2014 3:40 PM, 'J. Forster' jfor at quikus.com
>> > [Vintage-Military-RADAR] wrote:
>> >> I want to power up parts of an ASB-5 RADAR. The thing takes 800 Hz,
>> >> either
>> >> 80 or 115 VAC, Single Phase, roughly 500 - 1000 Watts.
>> >>
>> >> I've read articles on the web about modifying commercial (Asian) 60 Hz
>> >> units for 400 Hz. This seems a possible alternative, but the articles
>> >> referred to obsolete and unavailable converters.
>> >
>> > This is certainly a possibility, but will require some development
>> > work. It depends on how much time you have to devote to it.
>> >
>> >> Does anybody know of suitable 'true sinewave' 60 or 800 Hz inverters
>> >> that
>> >> are currently available (used OK) that have documentation available? My
>> >> guess is that not only the internal clock, but also any output filters,
>> >> would need modifying.
>> >
>> > Sure. Behlman makes the best, [snip]
>> 
>> Mike,
>> 
>> I was referring to a current, modifyable one. I know Elgar and B-I make
>> good iron, but I can't really deal with one of those at present.
>> 
>> -John
>> 
>> ================
> 
> __._,_.___
> Posted by: Tim <timsamm at gmail.com>
> Reply via web post	•	 Reply to sender	•	 Reply to group	•	Start a New Topic	•	Messages in this topic (2)
> For current radio net info, see the bi-weekly net 
> announcement which is sent to you via e-mail.
> 
> The net schedule can also viewed at any time, 
> by going to: 
> 
> http://groups.yahoo.com/group/armyradios/files/armynets.txt
> 
> The URL for the armyradios group at Yahoo is: http://groups.yahoo.com/group/armyradios
> 
> Community email addresses:
> Post message: armyradios at yahoogroups.com
>    Subscribe: armyradios-subscribe at yahoogroups.com
> Unsubscribe: armyradios-unsubscribe at yahoogroups.com
>   List owner: armyradios-owner at yahoogroups.com
> 
> VISIT YOUR GROUP New Photos 1
> • Privacy • Unsubscribe • Terms of Use 
> .
>  
> 
> __,_._,___