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 Post subject: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Sun 12, 2021 5:47 am 
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Just arrived Friday, tested tonight.

First advantage is the blue digital readout, which looks really nice in the dark, and lets me know where I am.

The sound is much better than the RF-2200.

Extremely sensitive, the RF-2200 has only a slight edge.

The RF-3100 is just aesthetically pleasing in all respects.

Glad I bought another dang radio.


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Last edited by Dalton on Sep Sun 12, 2021 2:00 pm, edited 2 times in total.
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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Sun 12, 2021 1:01 pm 
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Now you need to get an RF-4900. :D

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Dave


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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Sun 12, 2021 1:47 pm 
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Dave Doughty wrote:
Now you need to get an RF-4900. :D

Attachment:
Panasonic RF-4900.jpg

Dave


Of course! :D

This radio truly exceeded my expectations.

Thanks, Dave!

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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Sun 12, 2021 8:41 pm 
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Dave Doughty wrote:
Now you need to get an RF-4900. :D

Attachment:
Panasonic RF-4900.jpg

Dave

Almost forgot - the 3100 doesn't drift! :D

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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Sun 12, 2021 8:44 pm 
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What cool things have done before!

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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Sun 12, 2021 9:02 pm 
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I love mine.


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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Sun 12, 2021 10:43 pm 
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US7IGN wrote:
What cool things have done before!


Agree 100%

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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Sun 12, 2021 10:50 pm 
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fifties wrote:
I love mine.


I didn't fully appreciate it till last night, when it was pulling in WSM 650 Nashville Gran Ole Opry 618 miles away like it was next door, with beautiful sound nice and loud.

And yes I know it's a high power station, yada yada yada.

But my lesser radios pick up WSM with tons of interference and noise. Not so the 3100.


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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Mon 13, 2021 1:03 am 
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Convince me I don't need this:

Think I'm giving in...


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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Mon 13, 2021 1:15 am 
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Zenith Royal wrote:
Convince me I don't need this:

Think I'm giving in...


Nice C Crane!

How's the display holding up?

I just did a comparison with my Tecsun PL880 and the RF-3100.

Very, very close on a.m. sensitivity.

Of course, the PL880 has multiple filter selections and is almost a comms receiver in a miniature package.

The RF3100 beats the audio of the PL880, for music.

There are noticable differences between Japanese and Chinese manufacture, imo, in quality control.

And I don't think my PL880 will be kicking it in 40 years.

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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Mon 13, 2021 1:27 am 
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Zenith Royal wrote:
Convince me I don't need this:

Think I'm giving in...


You need one. I bought mine used (it's actually a 2E) but it is an AM DX powerhouse. And not just AM but FM too. Really nice sound. Probably my most used modern radio.


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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Mon 13, 2021 1:52 am 
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Location: Tucson, Arizona, 85704
The best low cost SW radio I bought was a Panasonic RF B45. And foolisly sold it.

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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Mon 13, 2021 2:28 am 
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Dalton wrote:
Zenith Royal wrote:
Convince me I don't need this:

Think I'm giving in...


Nice C Crane!

How's the display holding up?

I just did a comparison with my Tecsun PL880 and the RF-3100.

Very, very close on a.m. sensitivity.

Of course, the PL880 has multiple filter selections and is almost a comms receiver in a miniature package.

The RF3100 beats the audio of the PL880, for music.

There are noticable differences between Japanese and Chinese manufacture, imo, in quality control.

And I don't think my PL880 will be kicking it in 40 years.


I don't have it yet. I sent an email to Jay Allen about the display and button contact issues. The radio to avoid is the CC Radio plus. That was the model before the "2" model. I love the "Titanium " color, but it's only available on the 2E. So it's either the 3E with Bluetooth in Black Mica, or the 2E in Titanium without Bluetooth. Stay tuned...


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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Wed 15, 2021 1:58 am 
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rgbiker wrote:
The best low cost SW radio I bought was a Panasonic RF B45. And foolisly sold it.


They fetch a good price these days!

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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Wed 15, 2021 2:00 am 
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Zenith Royal wrote:
Dalton wrote:
Zenith Royal wrote:
Convince me I don't need this:

Think I'm giving in...


Nice C Crane!

How's the display holding up?

I just did a comparison with my Tecsun PL880 and the RF-3100.

Very, very close on a.m. sensitivity.

Of course, the PL880 has multiple filter selections and is almost a comms receiver in a miniature package.

The RF3100 beats the audio of the PL880, for music.

There are noticable differences between Japanese and Chinese manufacture, imo, in quality control.

And I don't think my PL880 will be kicking it in 40 years.


I don't have it yet. I sent an email to Jay Allen about the display and button contact issues. The radio to avoid is the CC Radio plus. That was the model before the "2" model. I love the "Titanium " color, but it's only available on the 2E. So it's either the 3E with Bluetooth in Black Mica, or the 2E in Titanium without Bluetooth. Stay tuned...


Keep us posted, Zenith! :D

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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Wed 15, 2021 4:40 am 
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rgbiker wrote:
The best low cost SW radio I bought was a Panasonic RF B45. And foolisly sold it.


A terrific MW DX radio. My best overall. I've heard the RF-B65 is also good.

The RF-B45 is the last Japanese made Panasonic radio.

Maybe you can find one used. There's not all that much that can break, so one should work OK.


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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Wed 15, 2021 1:04 pm 
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I like my RF-3100 for a variety of reasons but they lied in the ad posted earlier.

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Panasonic RF-3100 Ad.jpg
Panasonic RF-3100 Ad.jpg [ 114.18 KiB | Viewed 384 times ]

Their claim of "PLL Quartz Synthesized Tuning" is incorrect. The PLL synthesizer is used for band selection only but the actual "tuning" within each band is old-fashioned, analog using a ganged, variable capacitor. The digital frequency display is driven by a frequency counter connected to the analog local oscillator and converted to show the station's frequency. Analog tuning is one reason why I like my 3100.

Dave


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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Wed 15, 2021 10:29 pm 
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Dave Doughty wrote:
I like my RF-3100 for a variety of reasons but they lied in the ad posted earlier.

Attachment:
Panasonic RF-3100 Ad.jpg

Their claim of "PLL Quartz Synthesized Tuning" is incorrect. The PLL synthesizer is used for band selection only but the actual "tuning" within each band is old-fashioned, analog using a ganged, variable capacitor. The digital frequency display is driven by a frequency counter connected to the analog local oscillator and converted to show the station's frequency. Analog tuning is one reason why I like my 3100.

Dave


Thanks, Dave!

I just love this thing! :D

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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Wed 15, 2021 10:59 pm 
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Location: Montreal, Quebec
I'd say it's correct. It's the same scheme used by the HRO-500 about 1964, in essence a crystal controlled converter ahead of a receiver that tunes 500KHz.

That was a big step, get rid of all those crystals, one per band. The only way to get a better dial at the time. Various ham receivers, and the Heathkit SB313, used the same idea, but only covered some parts of the shortwave spectrum (or added at the cost of another crystal per band).

The Wadley loop was another path to the same goal, get rid of all those crystals. It didn't matter so much in high end receivers like the R390, but the Barlow Wadley XCR-30 from the early seventies was groundbreaking for portable receivers.

For a while, one analog oscillator was a tradeoff. Didn't the Sony 2001, groundbreaking in itself, tune every 5KHz, with fine tuning? I know the Sony SW-1, the tiny one, had a synthesizer that incremented by 10KHz, it gets 5KHz steps by adjusting the second conversion oscillator.

Fine steps mean slow lockup and/or noise, so it took some time to get there.

Though it's interesting. This receiver had to add circuitry to get digital readout besides the synthesizer, but a synthesiser with small increments, the readout almost comes free.


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 Post subject: Re: I like my new Panasonic RF-3100 better than the RF-2200
PostPosted: Sep Thu 16, 2021 1:48 am 
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mblack wrote:
I'd say it's correct. It's the same scheme used by the HRO-500 about 1964, in essence a crystal controlled converter ahead of a receiver that tunes 500KHz.

That was a big step, get rid of all those crystals, one per band. The only way to get a better dial at the time. Various ham receivers, and the Heathkit SB313, used the same idea, but only covered some parts of the shortwave spectrum (or added at the cost of another crystal per band).

The Wadley loop was another path to the same goal, get rid of all those crystals. It didn't matter so much in high end receivers like the R390, but the Barlow Wadley XCR-30 from the early seventies was groundbreaking for portable receivers.

For a while, one analog oscillator was a tradeoff. Didn't the Sony 2001, groundbreaking in itself, tune every 5KHz, with fine tuning? I know the Sony SW-1, the tiny one, had a synthesizer that incremented by 10KHz, it gets 5KHz steps by adjusting the second conversion oscillator.

Fine steps mean slow lockup and/or noise, so it took some time to get there.

Though it's interesting. This receiver had to add circuitry to get digital readout besides the synthesizer, but a synthesiser with small increments, the readout almost comes free.



Thanks, mblack!

I xan't get enough radio history, and your posts are always a great read!

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