hi all.
I'm having a bit of a strange issue with a uniden (8719) washington im working on.
It seems that the S-meter reads differently in receive depending on which mode the radio is in.
AM reads normal (S9 @ 100uV) but USB reads a bit higher, and LSB a bit higher than that. it's a total of about a 2 S-unit difference. (EDIT: it's the "resting state" of the S meter that is different.
like, AM reads below S1, USB reads S1 and LSB reads just under S2)
the clarifier has been unlocked, and the meter light has been replaced by an LED. radio is re-capped and aligned.
right now my suspicion is that i need to remove R144 or R146 thinking that the clarifier is still connected to the 7.8mhz filter (FT1) but that is just a guess from giving the schematic a look.
I am at work and am hoping to work on this tonight so i thought i'd bring the community in on this one since i haven't seen it before.
ideas?
thoughts?
insults?
LC
I'm having a bit of a strange issue with a uniden (8719) washington im working on.
It seems that the S-meter reads differently in receive depending on which mode the radio is in.
AM reads normal (S9 @ 100uV) but USB reads a bit higher, and LSB a bit higher than that. it's a total of about a 2 S-unit difference. (EDIT: it's the "resting state" of the S meter that is different.
like, AM reads below S1, USB reads S1 and LSB reads just under S2)
the clarifier has been unlocked, and the meter light has been replaced by an LED. radio is re-capped and aligned.
right now my suspicion is that i need to remove R144 or R146 thinking that the clarifier is still connected to the 7.8mhz filter (FT1) but that is just a guess from giving the schematic a look.
I am at work and am hoping to work on this tonight so i thought i'd bring the community in on this one since i haven't seen it before.
ideas?
thoughts?
insults?
LC
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