[Boatanchors] Fw: Balun Testing

[Sandy W5TVW]

Only way I could think of is to terminate it percision 1% film resistor 
about 400-600 ohms, then measure the impedance at other end with something 
like a General Radio 1606 bridge or a solid state that would give you R+ 
or - jX  at the other (low impedance) end.  Measurements to be made at say 
3.5, 4, 7, 10, 14 etc. Mhz as desired.

73,
Sandy W5TVW

----- Original Message ----- 
From: "david knepper" <collinsradio at adelphia.net>
To: <boatanchors at mailman.qth.net>
Sent: Monday, January 15, 2007 5:25 PM
Subject: [Boatanchors] Fw: Balun Testing


> Original Message ----- 
> From: "david knepper" <collinsradio at adelphia.net>
> To: <geraldj at ispwest.com>
> Sent: Monday, January 15, 2007 6:22 PM
> Subject: Balun Testing
>
>
> How does one test a 4:1 balun to see if it is still perfect?  My friend 
> suspects that the balun has gone bad since his SWR has risen.  I have a 
> duplicate here and the resistances check out,  that is,  there is 
> continuity on the coax connector and the other end where one connects the 
> antenna.  He told me that he may have "smoked" the unit since he has put 
> 1500
> watts on the unit although it is rated for 1500 watts on CW and SSB, which
> means that it is rated for intermittent service at that wattage.
>
> The balun is one made by Radio Works, with two wires at one end and a 
> coaxial fitting at the other end.
>
> Thanks
>
> Dave, W3ST
> Publisher of the Collins Journal
> Secretary to the Collins Radio Association
> www.collinsra.com - the CRA Website
> Now with PayPal
> CRA Nets: 3.805 Mhz every Monday at 8 PM EST and 14.253 Mhz every Saturday 
> at 12 Noon EST
> Collins Chatroom - Daily at 4 PM EST on 14.285  Mhz
>
> _______________________________________________
> Boatanchors mailing list
> Boatanchors at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/boatanchors
> ** List Administrator - Duane Fischer, W8DBF/W9WZE **   ** For Assistance: 
> dfischer at usol.com **         $$ For vintage radio info, see the HCI web 
> site $$      http://www.w9wze.org
>
>
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.432 / Virus Database: 268.16.12/628 - Release Date: 1/15/2007 
> 11:04 AM
>
>