DX-100B Problems Continued

[Joe Dube]

Fred the biggest part of the job is getting the vfo off the chassis. After 
that the all you need do is replace the 43 and or the 47pfd mica ca caps.  I 
think the 47 pfd controlls the 160-80 meter portion and the other the 40-10 
meter portion. It might be the other way round i would have to loook at the 
schematic again. Either way it is not too difficult just a pain in the 
butt!!!!   Anyway good luck.

Joe
----- Original Message ----- 
From: "Chuck W4MIL" <cemilton at AOL.COM>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Thursday, February 07, 2008 2:15 PM
Subject: Re: DX-100B Problems Continued


> Hi Fred.............
>
> Interestingly enuf............the DX-100 VFO is a VF-1.  Just in different 
> clothing.  I would guess that another external vfo would work provided it 
> produces the range of frequencies needed to emulate a VF-1 or the existing 
> internal one.
>
> If I'm not too far off base, the VF-1 is pretty much the same design as 
> the EF Johnson 122.  I've owned a couple of them and I seem to recall that 
> the 122 had a quirk whereby it actually used the design of the oscillator 
> in the Viking II transmitter as part of it's output scheme.  At least one 
> one or two bands.  I'm thinking maybe the 160m band.
>
> Something tells me the DX-100 and the VF-1 have a similar relationship.
>
> It's been a long time back and I cannot remember any of the particulars. 
> And my EFJ 122 and Viking II are doing duty at some other qth these days. 
> Fortunately, my DX-100 is playing like a champ with the internal (vf-1) 
> lashup.
>
> 73
> Chuck
> W4MIL
>
>
> -----Original Message-----
> From: FRED HOLNAGEL <w7prv at teleport.com>
> To: Chuck W4MIL <cemilton at AOL.COM>; HEATH at LISTSERV.TEMPE.GOV
> Sent: Thu, 7 Feb 2008 1:24 pm
> Subject: RE: [HEATH-TEMPE] DX-100B Problems Continued
>
>
> My 2c worth. Can a guy use the VF-1 or similiar outboard VFO?  Fred  W7PRV
>
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