? GARBLE ?????

[FlyBoy50]

While bathing to get ready for my Grandson's graduation I listened to my Lincoln II+ and experience a strange Garble on 38 lsb like people talking way off in a distant land. No matter what I did with RF gain or Clarifier I couldn't clear it up, so I change the Bands & Modes and it was still Garble. So I tried my Cobra 2000 & my DX 2547 and it wasn't in either one of them. ( Silence ) So I ask from the more experienced operators. What was that coming out of that radio and not the others. I could see the receive meter flicker a little sometimes and a couple times I could almost understand the garble !

 

[Cable Guy]

Maybe strong am bleed over? Perhaps the receiver isn't as selective, and an AM station running lots of power was creeping in from another frequency? Do your other rigs have a channel guard? I have heard that before, couldn't tune them in using any mode, always garbled. I assumed they weren't even using the frequency I was on, maybe harmonics is what you're hearing.

 

[FlyBoy50]

Maybe strong am bleed over? Perhaps the receiver isn't as selective, and an AM station running lots of power was creeping in from another frequency? Do your other rigs have a channel guard? I have heard that before, couldn't tune them in using any mode, always garbled. I assumed they weren't even using the frequency I was on, maybe harmonics is what you're hearing.

Thanks for the thought. I didn't think of AM but switching thru the mode I hit on AM but it could have come from a different channel. I haven't heard of channel guard before so don't know much about it.

 

[Cable Guy]

Thanks for the thought. I didn't think of AM but switching thru the mode I hit on AM but it could have come from a different channel. I haven't heard of channel guard before so don't know much about it.

It's a filter installed inside the radio that reduces bleed over and increases selectivity. Some receivers are better than others and have a sharper skirt. I would think a Lincoln II would have a decent receiver though. Regardless, any receiver can pick up bleed over, even with a channel guard, but the guard reduces it.

 

[columbas]

He could had been on 38.0000. Further than your clarifier can go.

 

[columbas]

You have a good radio but it’s not made to go to frequencies on tuning like the RCI dx series radios or like the ham radios It has been my experience that this is usually why you can’t seem to clarify people. I have found the using usb and lsb on I between channels in your case 38.0000. You can change your clarifier with a different value to track further. I am not sure if I timber right but I think you change the clarifier to a 10. Turn clarifier. It’s slower but tracks further each direction. I hope this helps answer your question. .

 

[columbas]

Forgive my typo on spelling. I am replying on my iPhone and AI thought it knew what I was spelling. Lol.

 

[Crawdad]

A Lincoln II can be tuned in VFO mode to any frequency, no Clarifier required. Not just "channels".

 

[BC Coyote]

While bathing to get ready for my Grandson's graduation I listened to my Lincoln II+ and experience a strange Garble on 38 lsb like people talking way off in a distant land. No matter what I did with RF gain or Clarifier I couldn't clear it up, so I change the Bands & Modes and it was still Garble. So I tried my Cobra 2000 & my DX 2547 and it wasn't in either one of them. ( Silence ) So I ask from the more experienced operators. What was that coming out of that radio and not the others. I could see the receive meter flicker a little sometimes and a couple times I could almost understand the garble !

Sounds like Noise Blanker overload. I get it on my 5555N2 when there are a lot of strong signals across the band............. If I turn on NB the static goes away, but I get a lot of mumbly noise. The passband of the blanker is being overloaded and you can hear the results. Turning down the RF gain at these times, makes the problem go away. Note this is the Noise Blanker I'm talking about, not DSP noise reduction.

 

[Shadetree Mechanic]

There is a known problem with the front end of the receiver on the Lincoln+2 series of radios. Strong signals can easily overload it, I will see if I can find the information.

Edit: even signals that aren't strong would do it too.

 

[Shadetree Mechanic]

Here it is:

J

Thread 'Improving receive'

Dec 16, 2023

Is there any way to improve the receive on a President Lincoln 2+ radio?

• jerry S
• Replies: 33
• Forum: General Ham Radio Discussion

• 

 

[FlyBoy50]

There is a known problem with the front end of the receiver on the Lincoln+2 series of radios. Strong signals can easily overload it,

LOL There seems to many known issues with the Lincoln II+ and from what I've seen is President Radio doesn't sell it anymore. I'm just a stubborn Old Fart who spent too much time & money on this piece of garbage and don't know enough to Give Up. I want to find out info on the Engineering And/Or Service Menu and exploit all possibilities before I kick it to the curb or better yet Introduce it to my BFH ! ( Oh what a relief it is ! ) LOL

 

[columbas]

I was referencing the cobra 2000 and the dx 2547 radios. On the Lincoln I have no experience with that radio. Since it will tune to 38.0000 and you still can not tune them in on that frequency or on usb or lsb I have no clue to why you could not tune them in with the Lincoln.

 

[columbas]

One last question. Did you try going to 39.0000 lsb and 37.0000 usb ?? Sometimes that is what they are doing as well

 

[AudioShockwav]

I have been an avid user of the 2510/Lincoln radios for decades, when they announced the release of the II I was excited and bought one of the first radios that came to market.
The RX sucked ,it was awful.
Signal overload, distortion and what I described as AGC pumping that required turning the RF gain down 40% to stop it.
Returned it two days after I bought it because I just couldn't stand listening to it....
Same issues as the Grant II, but at least after two failed revisions, they released the Grant II Premium with a upgraded rx, that should have been the case for the Lincoln II, but did not happen.

73
Jeff