Hi Gang...
Well, I got one of my NC38S's up and running. Haven't put it on the air and
made a contact yet, but have been playing with it, trying to figure a couple
of things out.
I built it with the 5 watt and TIcK mods from the start, left out the proper
parts and put in what was needed.
5 watt mod was no problem. I do not have C505(C501) installed and have a
good signal on the scope with 5 watts out. Did I read where someone used a
Poly Cap instead of a silver mica for C505?? It'll do more than 5 watts but
the signal starts looking rough. I plan on doing the variable power mod
posted by Brian (W5VBO) as I don't like running 5 watts, I'm more
comfortable at 4 and below.
The TIcK mod was another matter. I've been reviewing the schematic and all
the posts on it. I have made both cuts to the circuit board, #2 and between
C32 and R17. I have jumpered out D8. There is a 220K resistor in R17 (I'm
considering jumpering it out all together). The 4.7K resistor is connected
from C32 to the C34 side of R19.
I gotta work on the thump, it's noticeable.
What's also noticable is a REALLY LOW sidetone.
And I CANNOT hear the programming tones. The only way for me to hear the
programming tones is to jumper the cut #2 trace, then the programming tones
are good and loud. ANY IDEAS???? Maybe a double pole normaly open switch??
I'm going to put a 100K pot in R24, it seems to give enough "volume"
control. I've had my ears pounded by a number of strong signals recently
while playing with it.
I also put in a 6.8uH for L1 (THANKS JIM). Tuning range is 108-134. I'll
bring that down towards the bottom of the band later.
I'm using the R/S pots right now, I may change them out later. They have
the "useless" portion at the bottom of the pot.
Has anyone disconnected the jumper at D8 and fed the TIcK sidetone into pin
15, using U4D and U4E for the sidetone circuit??? If so, how did it work.
I'm thinking of trying that to cure some of the sidetone problems but I'm
not sure it'll work. Am I missing something here??
THANKS to everyone involved with the design, production, and distribution of
this wonderful kit. I've remembered more about electronics and kit building
in the past couple of weeks thanks to this kit.
THANKS for all the informational posts from those that have already built
it, many of my questions were cleared up by those posts, and some of them
helped jog my "brain"...
72/73's
-- Bill Myers KK4KF Grid - EM60rk FISTS#2390 QRP-L#755 ARCI#9282 scQRPions#42 CQC#386 NE#508 AK/QRP#081 Snail Mail P. O. Box 178 Shalimar, FL 32579 e-mail <bmyers@destin.nfds.net> homepage http://destin.nfds.net/~bmyers/ CHECK OUT THE FISTS INTERNATIONAL CW CLUB U. S. HOMEPAGE http://n9nvv.qrp.com/~fists (That's N 9 N V V)
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