[Boatanchors] small dual coax or shileded twin lead

[Gary Schafer]

A note about microphone cable and RF; 
Many years ago I converted an ARC5 transmitter for a VFO to use with a 20A.
I used a piece of microphone cable to run up to the trimmer capacitor on the
front panel that adjusted the vfo. The thing would drift all over the place.
I replaced every part in the vfo including the coils etc. The last thing I
replaced was the piece of microphone cable that was being used to run up to
the vfo trimmer capacitor. The vfo was rock solid after that!

Microphone cable is not stable at RF.

73
Gary  K4FMX

> -----Original Message-----
> From: boatanchors-bounces at mailman.qth.net [mailto:boatanchors-
> bounces at mailman.qth.net] On Behalf Of Don Buska
> Sent: Monday, March 23, 2009 1:05 AM
> To: Bill Paschall; boatanchors at mailman.qth.net
> Subject: Re: [Boatanchors] small dual coax or shileded twin lead
> 
> Bill,
> 
> Any decent music store will have balanced lead shielded cable that they
> use for microphones.  They sell it by the foot at my local store and
> it's usually good quality Belden.  It should work fine with your 91D.
> 
> 73
> 
> Don N9OO
> 
> 
> 
> Bill Paschall wrote:
> > I am building a probe for a Boonton 91D rf voltmeter and need some
> shielded
> > cable with dual leads, anyone have any to spare or know a sourse at
> > reasonable prices?
> > Bill,  WD5DZG
> > www.willydog5.com
> >
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