[Boatanchors] DX 100

[Kenneth D. Grimm, K4XL]

Unfortunately, I've had the exact problem with a DX-100 and it was 
caused, as Glenn suggests, by one of the mica caps in the vfo.  Too many 
years have gone by for me to be more specific, but I remember the 
incident well because, at the time, it was generally believed that the 
mica caps would last forever.  That proved to not be the case!   :-)  
Good luck in finding the offending part.
73,
Ken, K4XL

Glenn Little WB4UIV wrote:
> Sound to me to be a mica capacitor that is used to resonate 160/80 
> meters. Some mica capacitors had a problem where a plate would come 
> disconnected from the endplate. With temperature it would reconnect 
> and change the capacitance.
>
> This is a guess, having not seen the DX-100 but replaced a number of 
> mica capacitors for this problem
>
> 73
> Glenn
> WB4UIV
>
> At 08:40 AM 11/06/07, Joe Dube wrote:
>> I recently aquired several DX 100's  to refurb.  I have run into 
>> several strange problems most of which I couold take care of. One 
>> though is really confusing and I was wondering if anyone out ther has 
>> seen this before and maybe could give me a bit of advice.  The VFO is 
>> rock solid on 40-10 meters. On 160 and 80  is is unstable. It shifts 
>> several cycles at odd intervals.  It can be heard when you key the 
>> vfo by itself.  Sounds like the supply voltage is changing but  like 
>> I said before the vfo is rock solid stable on 40 and above.  That 
>> might seem to eliminate the supply voltage??    Would anyone out 
>> there have any Idea what could be the problem or have a few places 
>> for me to look without having to dismantle the VFO?  Any help would 
>> be greatly appriciated.
>>
>> Joe K4TR


-- 

Ken K4XL
k4xl at arrl.net

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