[ARC5] Receiver input impedance...

[Glen Zook via ARC5]

For some reason, the URL for the Parts Express baluns didn't come through!

Here it is again:

http://www.parts-express.com/75-to-300-ohm-matching-transformer--180-010

 
Glen, K9STH 

Website:  http://k9sth.net


On Sunday, October 19, 2014 2:32 PM, Glen Zook via ARC5 <arc5 at mailman.qth.net> wrote:
 


I discovered, years ago, that the lowly TV balun works wonders with receiver front ends.  Those available today go down to at least 5 MHz and my experience has shown that they work down to at least 160-meters.

Here is the article that I wrote 15-years ago on this subject:

http://nebula.wsimg.com/b489aa03011b4fc90655d356fe270973?AccessKeyId=5DDC3F25F0398F58962E&disposition=0&alloworigin=1


Suitable baluns are available from Parts Express:

"75 to 300 Ohm Matching Transformer" from www.parts-express.com!


At 65-cents in quantities of 10, I usually purchase 10 and keep them around for use whenever I run into a receiver that really doesn't like 50-ohm coaxial cable.

Glen, K9STH 

Website:  http://k9sth.net


On Sunday, October 19, 2014 2:16 PM, Jim Falls <radio-tuber at att.net> wrote:



I use a Cheapo Grande TV twin lead to cable adapter on my Super Pro. Not a mind-blowing difference, but these old ears can hear it. 

Cheers!
Jim K6FWT
CBLA #37

> On Oct 19, 2014, at 10:12, Kenneth G. Gordon <kgordon2006 at frontier.com> wrote:
> 
>> On 19 Oct 2014 at 11:51, David Stinson wrote:
>> 
>> 
>> ----- Original Message ----- 
>> From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
>> 
>>> Thus, it seems to me that an 80:1 Un-Un might improve matters 
>>> somewhat,
>> 
>> Ken, my guess would be that the losses in a 80:1 UNUN
>> would negate anything gained by the match.
> 
> Hmmm....I hadn't thought of that....
> 
> Ken W7EKB
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