[ARC5] Why an UNUN?

[Mike Hanz]

As long as you add the series capacitance, yes.

On 10/24/2012 6:01 PM, D C _Mac_ Macdonald wrote:
> I gather, then, that the ARC-5 and SCR-274 transmitters
> are designed to work into an impedance around 12 Ohms?
> And therefore, addition of the 4:1 Un-Un will allow the
> command sets to load properly into the usual dipole?
>   
> * * * * * * * * * * *
> * 73 - Mac, K2GKK/5 *
> * (Since 30 Nov 53) *
> * k2gkk at hotmail.com *
> * Oklahoma City, OK *
> * USAF & FAA (Ret.) *
> * * * * * * * * * * *
>   
>   
>> From: brianclarke01 at optusnet.com.au
>> To: arc5 at ix.netcom.com
>> Date: Thu, 25 Oct 2012 08:22:30 +1100
>> CC: arc5 at mailman.qth.net
>> Subject: Re: [ARC5] Why an UNUN?
>>
>> And a third reason, Dave,
>>
>> You can fit an appropriate Unun inside the BC-442 or equivalent.
>>
>> And the turns ratio of the unun will be 2:1 because you require 24 V across 50 Ohm to deliver 12 W. Using a small ferite core can allow this unun to cover most of the ham bands that Command sets can work - 160, 80 and 40. So, no need for external components or any per set modifications.
>>
>> 73 de Brian, VK2GCE.
>>
>>> David Stinson <arc5 at ix.netcom.com> wrote:
>>>
>>>
>>> Found a WiFi hot spot for my laptop. :-)
>>>
>>> Couple of reasons for using the series cap
>>> and broadband UNUN:
>>>
>>> Assuming a resonant antenna, does not require
>>> one to build and/or add an external tuning network.
>>> More important: It's simple, easy and cheap.
>   		 	   		
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