[Elecraft] Re: MFJ259

[d.cutter at ntlworld.com]

I blew the front end while tuning an antenna near another that was energised.

David
G3UNA
> 
> From: "Dave Sergeant" <dave at davesergeant.com>
> Date: 2007/03/14 Wed AM 10:04:57 GMT
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] Re: MFJ259
> 
> I don't have a 259 myself but some of my friends do. It is clearly a 
> useful bit of kit.
> 
> But I have repaired a couple! I agree about the build standard, not 
> that hot, and not made easy to repair either with most of the 
> components inaccessible underneath the board. In both cases they had 
> been damaged by the user applying the supply the wrong way round - 
> there is no idiot diode to prevent this. It takes out one of the 5V 
> regulators and also a LM324 quad op-amp. If you have one it is worth 
> adding a series diode in the supply to save you the hassle.
> 
> I would also make a plug for a noise bridge. I built the one by KI6WX 
> which appeared in QST in August 1989 (available to download from the 
> ARRL site). If you have a suitable portable rig to couple to it does 
> most of what the fancy analysers can do at a fraction of the cost.
> 
> 73 Dave G3YMC
> 
> 
> http://www.davesergeant.com
> 
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft    
> 
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
> 

-----------------------------------------
Email sent from www.virginmedia.com/email
Virus-checked using McAfee(R) Software and scanned for spam