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4.7 pf cap in 10/20 meter SR v6.2 kit   Message List  
Reply | Forward Message #17791 of 38998 |
Re: [softrock40] 4.7 pf cap in 10/20 meter SR v6.2 kit

Hi Chris,
 
C102 is not used on the 10m daughter board so the 4.7 pF cap is not needed in the kit.
 
112.36 MHz overtone crystals are on order and hopefully will be in this week.  I have the envelopes addressed to send these crystals to those who have place an order for a crystal just as soon as I receive my crystal order.
 
The daughter board may be tested by soldering in a 1000pF cap in one of the crystal positions, select that "crystal" with JP100 and check for frequency of oscillation.  Adjust the turns of L100 to get the output frequency to about 112 MHz.  Make sure the p-p volts output of the daughter board is slightly more than 3 volts.
 
73,
Tony KB9YIG
----- Original Message -----
From: kd4pbj
Sent: Saturday, January 19, 2008 10:34 PM
Subject: [softrock40] 4.7 pf cap in 10/20 meter SR v6.2 kit

Hi,

I am building a 10/12 meter kit for a fellow and in my bag o' parts for
the daughter board I had a blue 4.7 pF cap left over when I finished
building the board. Is this the C102 "Not Used" cap?
Also thee were no crystals included in the kit. I saw an earlier email
in the archives from Tony and I am assuming that the crystals are on
order. The person I am building the kit for didn't mention anything to
me about not having the crystals.

Chris
KD4PBJ



Sun Jan 20, 2008 6:12 am

kb9yig
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Message #17791 of 38998 |
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Hi, I am building a 10/12 meter kit for a fellow and in my bag o' parts for the daughter board I had a blue 4.7 pF cap left over when I finished building the...
kd4pbj
Offline Send Email
Jan 20, 2008
3:34 am

Hi Chris, C102 is not used on the 10m daughter board so the 4.7 pF cap is not needed in the kit. 112.36 MHz overtone crystals are on order and hopefully will...
Tony Parks
kb9yig
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Jan 20, 2008
6:12 am

Hi, Re the 10m daughter board. For testing I used a 47 ohm and a 1000 pf to imitate the crystal. I found that adjusting L100 to 16 turns gave me resonance...
zl1ujg
Offline Send Email
Jan 20, 2008
9:36 am

To get the 10m crystal right on its frequency at maximum output amplitude required 20 turns of wire on the air core toroid as well as the nylon washers. If...
Bill Dumke
billspiro1
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Jan 20, 2008
11:10 am
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