Am radio receivers only!!!.

2P3

I saw a review of that reproduction radio kit somewhere, maybe Radio Jay Allen had it? It had a familiarity to it once I saw the front plate, but other than that, I didn't know about the original radio or the fandom for it.

It looks kind of retro, of course not really going back to the 1960s with the technology, or they'd be using germanium transistors in metal cans and air-veriable tuning capacitors.

It looks like a mixer/IF strip in a SIP package, the long IC, and maybe the transistors are for the audio output. Two IF transformers, Yellow, Black, and oscillator, red, and I don't see a ceramic filter in the parts shown, more classic that way. I like the length of the antenna bar, looks like it could be a four inch, and it has two coils for some reason, could those be primary and secondary?

I have built 2 or 3 of those 'DIY - For Learning' radios, most are just for fun, but I don't mind making them, the fun part is building the kit. This one looks to be better, and has 1 mv claimed sensitivity.

Maybe the detector is inside of the IC? That should be better than the usual diode, silicon today, it's where these pocket radios often fall down and have higher distortion than they should.

To see what's being talked about:

www.ebay.com/itm/Tecsun-2P3-Superheterodyne-AM-Radio-Receiver-DIY-Kit-RED/142470835201

Going by the story of how the radio came to be for Chinese experimenters, where they bought just the case, then made their own radio to go in it, I'd like to see a case, with a board inside, and the tuning and volume controls, and maybe the loopstick installed already, and the speaker. The rest of the board would just be a perfboard with many holes to wire your choice of radio components in it, to make diode, regen, reflex and superhet radios on it and do lots of experimenting.

Boomer

Howdy Y'all:

                    I just received my tecsun 2p3 on oct 2, 2019

I received it in 3 days wow came from California to Florida.

When I get a chance I will build it.

The antenna ferrite is 3-7/8 inches long and 3/8 inches diameter
Good size and two antenna on each end!.

Nice looking old time case is what I like.


Station 8

Howdy y'all: 

                   I'll let you know how things go on the radio and manual 

And construction ok.

Station 8

Howdy y'all:

                   The tecsun 2p3 am radio kit

Very important note:

Make sure that IC measurement points 1,2,3, sections are making
Trace connections if there not radio will NOT work!.
You will see this on the Trace side print in manual.

The wires that go to speaker could be a little bit longer 
what you  can use is the left over wires from
The battery hook up for your new speaker wires!.

As reception report goes it did better then my tecsun pl880 unit!.
I was pulling in weaker station in better then the pl880 with amp on!.

The audio quality is very nice for this unit!.

This little unit is nice I'm impressed

I still got adjustments to do otherwise it's done


Hope this helps out

Station 8

Boomer said: It looks like a mixer/IF strip in a SIP package, the long IC, and maybe the transistors are for the audio output. Two IF transformers, Yellow, Black, and oscillator, red, and I don't see a ceramic filter in the parts shown, more classic that way. I like the length of the antenna bar, looks like it could be a four inch, and it has two coils for some reason, could those be primary and secondary?

The IC is the audio amp. The discrete transistors and components is the mixer/osc, IF etc. A ceramic filter is there. One of those "IF cans" is just a shield for a few components. The two coils is similar to Ccrane's twin coil that is used in the EP PRO, and the CC radio.

I may get one if it has decent sound that's not to screechy that's typical of little radios like this.

Kits are baby foxes

That's what kits lack today, good step by step instructions. One cheapie pocket radio, I had to noodle out the way the circuit should go, and look up parts references to be sure I was doing it right, going by the reference design.

I also wondered what kind of material the board is made of.

Oldies WMRK, that's what I thought later, looking at the top side of the board in that listing, the IC is for audio, not mounted in the RF area.

I didn't realize that one IF can was just a cover, I've seen that done in TVs, covering a sensitive circuit. Cool about the twin coils, and it looks like they're made of the proper wire and not just magnet wire.

I also have found that the sound quality varies between stations, sometimes a lot, and can make a good radio sound bad, so you have to find a station in your area that cares about sound quality, or listen to your own transmitter as the standard.

Boomer