You got me thinking now, glad I found this again.yeah, I know this is a 4+ year old post but hopefully someone can benefit from my reply.
Exactly - Except you can have both at the same time.
Take one of Franklin's 10.695 Channel Guard kits or make your own and remove the stage coupling cap right after the NB and install it there. Instead of setting it up for a zero gain/loss, mod your RF Gain to max, and use the RF gain knob to control the +DC (13.8v) to the circuit. Adjust incoming +DC voltage so that when the RG gain knob is at 12 o'clock, you have zero gain/loss (keep incoming signal low - below AGC turn on). Also, doing it this way, you don't have to re-calibrate your S meter. Keep the NB on. This way, the signal going into the circuit has been "cleaned" up. You may need to change the value of the transistor bias resistor to get a linear response as you increase/decrease +DC to the circuit.
With the RF Gain @ 12 o'clock, you get "normal" max sensitivity and -100dB @ 10 KHz selectivity. Turn the RF Gain CCW and you reduce the sensitivity but increase your selectivity even more. Turn the RF Gain CW and get an increase in sensitivity (past the normal max sensitivity) and still retain very high selectivity. And yes, you can hear signals that otherwise you wouldn't. Now whether you can get them to hear you is another matter....
I usually keep my RF Gain at 12 o'clock but when there is a station that is right in my noise level, I dial it up and pull him out with ease. It has more sensitivity and selectivity than any of my HF rigs.
Basically, greater dynamic range, increased selectivity, and increased sensitivity (variable, clean, attenuator/preamp) for any radio with a 10.695 I.F. stage.
About the Channel Guard from www.cbcintl.com:
The CHANNEL GUARD combines an IF amplifier stage with two high-Q crystal elements. You install it at an early IF signal point, before the signal branches off to the separate AM, FM, or SSB detectors. The result — razor-sharp selectivity in every mode. Since the “Q” (Selectivity Factor) of a crystal is many times higher than the normal tuned IF transformers, the strength of interfering signals even slightly off the center IF frequency drop off very quickly. Bleedover is greatly reduced.
FEATURES: · Provides up to 100 dB adjacent-channel rejection. This is much better than the majority of CB transceivers, which typically specify only –40 to –60 dB. A factor of “100 dB” means that any signal outside the normal 10 KHz CB channel spacing is reduced in strength by a factor of 10 billion from channel center. No reduction in receiver sensitivity. In fact, the CHANNEL GUARD adds one stage of amplification at the most critical point—right in between IF filtering stages. You may even hear those weak signals that you missed before.
What is wrong with the clarifier? It either works or it doesn't. Which version of the Q6? The original Q6 clarifier "center slot" is at around 3 o'clock, not 12 as one might expect. This changed in the Pro version.well... i got a q 6666 and clarifier is lousy. searched menu cant find anything to cure its ailement.its set to recieve. when anybody talks its impossible to clear anybody up. might be why they cheep and i got miss from hit n miss
Since you can't buy the ChannelGuard anymore, I think it is OK to add this info to the post so anyone that wants to try this can make their own.yeah, I know this is a 4+ year old post but hopefully someone can benefit from my reply.
Exactly - Except you can have both at the same time.
Take one of Franklin's 10.695 Channel Guard kits or make your own and remove the stage coupling cap right after the NB and install it there. Instead of setting it up for a zero gain/loss, mod your RF Gain to max, and use the RF gain knob to control the +DC (13.8v) to the circuit. Adjust incoming +DC voltage so that when the RG gain knob is at 12 o'clock, you have zero gain/loss (keep incoming signal low - below AGC turn on). Also, doing it this way, you don't have to re-calibrate your S meter. Keep the NB on. This way, the signal going into the circuit has been "cleaned" up. You may need to change the value of the transistor bias resistor to get a linear response as you increase/decrease +DC to the circuit.
With the RF Gain @ 12 o'clock, you get "normal" max sensitivity and -100dB @ 10 KHz selectivity. Turn the RF Gain CCW and you reduce the sensitivity but increase your selectivity even more. Turn the RF Gain CW and get an increase in sensitivity (past the normal max sensitivity) and still retain very high selectivity. And yes, you can hear signals that otherwise you wouldn't. Now whether you can get them to hear you is another matter....
I usually keep my RF Gain at 12 o'clock but when there is a station that is right in my noise level, I dial it up and pull him out with ease. It has more sensitivity and selectivity than any of my HF rigs.
Basically, greater dynamic range, increased selectivity, and increased sensitivity (variable, clean, attenuator/preamp) for any radio with a 10.695 I.F. stage.
About the Channel Guard from www.cbcintl.com:
The CHANNEL GUARD combines an IF amplifier stage with two high-Q crystal elements. You install it at an early IF signal point, before the signal branches off to the separate AM, FM, or SSB detectors. The result — razor-sharp selectivity in every mode. Since the “Q” (Selectivity Factor) of a crystal is many times higher than the normal tuned IF transformers, the strength of interfering signals even slightly off the center IF frequency drop off very quickly. Bleedover is greatly reduced.
FEATURES: · Provides up to 100 dB adjacent-channel rejection. This is much better than the majority of CB transceivers, which typically specify only –40 to –60 dB. A factor of “100 dB” means that any signal outside the normal 10 KHz CB channel spacing is reduced in strength by a factor of 10 billion from channel center. No reduction in receiver sensitivity. In fact, the CHANNEL GUARD adds one stage of amplification at the most critical point—right in between IF filtering stages. You may even hear those weak signals that you missed before.
you can never get that off frequency sound out. go very easy and this radio does not clarify right. ive reset reset many times.tried all settings and never gets dead on where you can fully understand anybodyWhat is wrong with the clarifier? It either works or it doesn't. Which version of the Q6? The original Q6 clarifier "center slot" is at around 3 o'clock, not 12 as one might expect. This changed in the Pro version.
Have you tried using the 10 Hz tuning steps? Your radio may be off freq from the display. You also did not say what version radio you have.you can never get that off frequency sound out. go very easy and this radio does not clarify right. ive reset reset many times.tried all settings and never gets dead on where you can fully understand anybody
its first version. i removed it from car n set er on bench hooked up. several resets and got it very close. ive treid what you posted. ive got it close nuff to say the old cheep midland 23 channel ssb radio recive quality not the 2024 quality recive . im leaving it there .@Rwb - Did you try the procedure I posted in post #115? Turn the clarifier Off when doing the procedure. Afterwards, make sure the clarifier is set to "RT" in the menu.