Re: [Amps] B&W 850A Repair

["Paul Kraemer" <elespe@lisco.com>]

Whatever helps to get you through the night Carl
Best Regards
Paul K0UYA
----- Original Message ----- 
From: "Carl" <km1h@jeremy.mv.com>
To: "Paul Kraemer" <elespe@lisco.com>; <amps@contesting.com>
Sent: Saturday, October 27, 2012 8:29 AM
Subject: Re: [Amps] B&W 850A Repair


> Silver prices went up, plating thickness went down (-;
>
> And #8 wire has long been a standard at .1285. Maybe your NIST boys are 
> using Chinese instruments.......
> Thats my story and Im sticking to it.
>
> Carl
> KM1H
>
>
> ----- Original Message ----- 
> From: "Paul Kraemer" <elespe@lisco.com>
> To: "Carl" <km1h@jeremy.mv.com>; <amps@contesting.com>
> Sent: Friday, October 26, 2012 8:57 PM
> Subject: Re: [Amps] B&W 850A Repair
>
>
> > And I measure it at 0.1245" to 0.1255"
> > Our calipers are maintained by a lab using NIST standards and they were 
> > recently certified
> > Customer requirement---they pay for it---we enjoy the benefits
> > Potato potahto, call it an 1/8" down here in the stix
> > Paul K0UYA
> > ----- Original Message ----- 
> > From: "Carl" <km1h@jeremy.mv.com>
> > To: "Paul Kraemer" <elespe@lisco.com>; <amps@contesting.com>
> > Sent: Friday, October 26, 2012 7:04 PM
> > Subject: Re: [Amps] B&W 850A Repair
> >
> >
> > > I measure the wire at .1325 which equates to  #8 wire with the plating.
> > >
> > > Carl
> > > KM1H
> > >
> > >
> > > ----- Original Message ----- 
> > > From: "Paul Kraemer" <elespe@lisco.com>
> > > To: "Gary H. Harmon, Jr." <gharmon@idworld.net>; <amps@contesting.com>
> > > Sent: Friday, October 26, 2012 6:57 PM
> > > Subject: Re: [Amps] B&W 850A Repair
> > >
> > >
> > > > Gary
> > > > No support except the back end.
> > > > Scaling "up" from a complete 851 (500w) the bars on the 851 are 5/16" 
> > > > wide with 1/8" material below the coil
> > > > Total thickness is the 1/8" plus wire diameter plus another 1/16".
> > > > The top is melted to anchor the turns
> > > > For the 850A that suggests that the bars need to be 3/8" wide by at 
> > > > least 1/8" below the wire + the wire + another 1/6" (or more ) above 
> > > > the turns.
> > > > I would suggest a minimum of 3/8" square bars---or even up to 1/2" 
> > > > square since the wire diameter is a hefty 1/8"
> > > > Get some 3/8" or 1/2" stock from McMaster Carr and start notching with 
> > > > a fine tooth band saw or jig (scroll) saw.
> > > > The notch spacing is linear over the approximate 3 1/4" length of the 
> > > > coil
> > > > McMasterCarr doesn't list Lexan but this is similar 
> > > > http://www.mcmaster.com/#polycarbonate-sheets/=jw6q79
> > > > If you can find actual Lexan it is best. Does not shatter or chip. 
> > > > Extremely strong and easy to work. It is used in bulletproof glass 
> > > > windows.
> > > > Have fun cutting all those notches! Clamp the bars together and do 4 at 
> > > > once.
> > > > Paul K0UYA
> > > > ----- Original Message ----- 
> > > > From: "Gary H. Harmon, Jr." <gharmon@idworld.net>
> > > > To: <amps@contesting.com>
> > > > Sent: Friday, October 26, 2012 3:07 PM
> > > > Subject: [Amps] B&W 850A Repair
> > > >
> > > >
> > > > > I need to replace the 4 plastic coil supports on my 850A band switching 
> > > > > coil
> > > > > assembly.  I have no pieces to measure so I need to know the width,
> > > > > thickness and length of the four pieces.  Is there some sort of 
> > > > > support of
> > > > > the four pieces at the ends inside the coil or is the only fastener 
> > > > > where
> > > > > they bolt to the L-shaped brackets connected to the front of the 
> > > > > assembly?
> > > > > Any suggestions on how to fasten the coils turns to the strips?
> > > > >
> > > > >
> > > > >
> > > > > Vr,
> > > > >
> > > > >
> > > > >
> > > > > Gary H. Harmon, Jr. - K5JWK
> > > > >
> > > > > 6003 Archwood
> > > > >
> > > > > San Antonio, TX 78239-1504
> > > > >
> > > > > 210.657.1549h / 210.884.6926c
> > > > >
> > > > >
> > > > >
> > > > > "Retirement means every day is a Saturday except Sunday".
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > _______________________________________________
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> > > >
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