| Author |
Message |
    
Al_lafon
Intermediate Member
Username: Al_lafon
Post Number: 116
Registered: 3-2005
| | Posted on Wednesday, December 07, 2005 - 1:45 pm: | 
|
Hello having a problem here when doing a alighment of the 10.695osc. The AM/USB is find
but the LSB alighment will not set at 10.692.0
what i get is 10.691.95 Mhz. I know this is in
spec. as they give +- of 50 Hz but i am getting
complants of off freq. Can some one give me some help with this problem. |
Coyote
Advanced Member
Username: Coyote
Post Number: 638
Registered: 11-2004
| | Posted on Thursday, December 08, 2005 - 8:36 am: |
|
I wouldn't pay to much attention to those that complain about you being off frequency a few Hz. They are just being to picky. No one can be perfect. Or tell em your radio is just fine and maybe they need to check theirs. 
You could unlock the clarifier and that would give you the ability to get on frequency with them if it bothers you.
CEF-443
MENC
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Al_lafon
Intermediate Member
Username: Al_lafon
Post Number: 118
Registered: 3-2005
| | Posted on Saturday, December 10, 2005 - 1:21 am: |
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This is all true but i'd like to get it dead on.
I have the 3-5825A and B and have got them dead
on freq. It be nice.
Thankyou Al |
Kid_vicious
Advanced Member
Username: Kid_vicious
Post Number: 928
Registered: 9-2004
| | Posted on Saturday, December 10, 2005 - 2:55 am: |
|
what are you adjusting for this? is it a coil or a variable cap?
if its a coil, you may be tuning to the wrong side of the peak.
im guessing that its a trimmer cap, and thats why it wond adjust that high. if so, check for a bad disc cap in series with the trimmer. or change its value to get the required reading.
did you make sure that the clarifier was centered when you started? (i know, dumb question, but...)
also check for a bad cap near the 10.695 crystal.
just some thoughts. hope you get it fixed.
matt |
Al_lafon
Intermediate Member
Username: Al_lafon
Post Number: 122
Registered: 3-2005
| | Posted on Saturday, December 10, 2005 - 10:21 am: |
|
Thanks its a trimmer cap with a disc cap in parallel with it was thinking about that ( value ).
When in LSB a 20pf trimmer and 39pf disc cap are
placed in parallel with the trimmer cap used to set AM/USB. Also tryed turning full 360 as nostop on trimmer cap to make sure we didn't have
two tuning points here. Parallel caps add up if
i am thinking right so we have 59pf here with 20pf of tuning not counting the fact that we also have the 20pf from AM/USB also clarifier at
high 12 o clock |
Kid_vicious
Advanced Member
Username: Kid_vicious
Post Number: 934
Registered: 9-2004
| | Posted on Monday, December 12, 2005 - 9:21 pm: |
|
you are correct. parallel caps add up.
good luck, i think youre on the right track.
matt |
Al_lafon
Intermediate Member
Username: Al_lafon
Post Number: 123
Registered: 3-2005
| | Posted on Saturday, December 17, 2005 - 5:51 pm: |
|
Yep but we have a 10.695.00 osc and i am trying to
get it on 10.692.00 but i only get in on 10.691.95 (The Problem) Do we need a smaller
or larger cap. |
