Why is my FTM-350R Beat-boxing ?

[Akytarus]

Hi,

I've just noticed a strange occurrence when the left VFO is scanning the right VFO squelch starts to beat box. It only stops when the left VFO is tunned to a station.

The issue starts about 18-19 seconds into the video. At 52 seconds I key up on simplex using a hand held, the issue only stops while the carrier is held.

Any Help....?

Please see this video to see what I mean

 

[Captain Kilowatt]

Birdies? Try stepping the left side thru the memory channels manually and see if any of them cause the right side squelch to open.

 

[N3KDJ]

Squelch Opening

That is strange. I do have to wonder what is transmitted on 191Mhz and whether or not this happens when you are on a more mainstream frequency on your right VFO?

 

[dudmuck]

I would say you are receiving the local oscillator of the receiver of other side.
Page 51 of manual lists I.F. frequencies.
One of them is 47.25MHz.

So under that condition 191.55 - 47.25 = 144.3MHz.
If you put left side on 144.3MHz, and right side on 191.55MHz then you should get a nice big carrier on the right side. This is likely due to a high powered L.O. and/or poor shielding between receivers. I think the feature of receiving vhf tv band is new.

The manual lists four different I.F. frequencies depending on mode, so the exact frequencies you get big carrier will change depending on side and mode.

 

[Akytarus]

Thanks that makes sense...

 

[Moleculo]

I love the way you described it: "Beat-boxing"

 

[Captain Kilowatt]

I would say you are receiving the local oscillator of the receiver of other side.
Page 51 of manual lists I.F. frequencies.
One of them is 47.25MHz.

So under that condition 191.55 - 47.25 = 144.3MHz.
If you put left side on 144.3MHz, and right side on 191.55MHz then you should get a nice big carrier on the right side. This is likely due to a high powered L.O. and/or poor shielding between receivers. I think the feature of receiving vhf tv band is new.

The manual lists four different I.F. frequencies depending on mode, so the exact frequencies you get big carrier will change depending on side and mode.

Like I said, birdies.

 

[Captain Kilowatt]

I love the way you described it: "Beat-boxing"

I was wondering what he meant until I viewed the clip and then I had a good laugh. The description was a good one. :laugh:

 

[Akytarus]

Beat-Boxing was the first word that came to mind when I first herd the phenomena...!

 

[depark]

That's absolutely hilarious.:w00t: