Another NorCal 40 Lives!

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From: Jason Penn (jason@persoft.persoft.com)
Date: Thu Jul 07 1994 - 12:31:12 EDT


 
Greetings to the QRP mailing list.
 
I just finished the assembly of my NorCal 40 Partial Kit. I did the bulk of the
soldering and inductor winding over the July 4 weekend. The only snag I ran
across was a dead transmitter section. After some signal tracing and head
scratching I found a tiny solder bridge shorting the VFO to ground near
the input of the xmit mixer. It puts out 3 watts according to my 'scope or
2.5 according to my questionable old Swan watt meter.
 
I did a few things different than specified, but not by choice. Since the
MVAM108 varactors have not come in I went to the local electronic
"odds-and-ends" dealer (mostly "odds" :-)).
He dug up a box labeled "varactors" and told me they
were something like 42 pF at 4.1 volts. He gave me one. In addition, Mouser
was out of stock on the 39 pF mica cap in the VFO, so I used a 33 pF mica
cap. The VFO was about 200kHz low. I took two turns off L9 for a total of
57 turns. C50 varied the VFO oouldn't matter.
 
I welcome anyone's comments on the use of the 33 pF cap and the unknown
varactor. The varactor looks like a glass diode with several funny bumps,
not a 2 leaded plastic transistor pack. I think the box they came from were
labeled with a part number, but I didn't write it down. If it is deemed
"acceptable" by Wayne, et. al., I might offer to send units to any takers
on this list building NC40 partial kits. I say "might" because the local
"odds-and-ends" dealer was going out of business the day I stopped in for
the varactor. It is unknown if I can still get them from him or if he can
still find them after his move. He is switching to strictly mail order, no
retail store front and moving to a smaller place that will only hold about
a third of his (then) inventory of "stuff".
 
Now to make that first NorCal 40 contact.....
 
73
 

-- 

Jason F. Penn N9RPT | Persoft, Inc. | jason@persoft.com Whenever I want to find something, it's always in the last place I look.


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