2P2 Tube Single Lamp Medium Wave Radio Battery 2P3 Without Casing

The 2P2 Tube Single Lamp Medium Wave Radio Battery 2P3 Without Casing is a portable decor essential, designed for dependable everyday performance and lasting value.

2P2Electronic tube single lamp radio board Kit

Magnetic rod coil needsSelf windingWith gauze covered wire and enamelled wire

Adaptation2P3CasingWithout casingThe casing needs to be photographed separatelyalsoWithout battery andhornBand immobility

Important tipsThat is, if the single tube machine is not connected to the antenna or small power amplifier speakerThe sound is too lowHardly heard

A small power amplifier uses a mobile phoneWith input lineBluetooth speakers or small computer speakers are OKThe first commissioning shall be connected

And can only receive local data1-2Geqiang stationSo this kitOnly foramateurDIYplay

After completionNoachievePortable listening effect giveMP3Headphones and 3.5turn6.5Seat

Kit introduction

Potentiometer with switch and regeneration regulation

DC battery14500Lithium battery3.7Fu He 9Volt power supplyScreen voltage9V Screen current less than0.5mA.

filament2.4Volt power supply 7Right foot1Foot negative5Foot emptyFilament current30mA.

Lamp low seatGlowing redLED 2.4Vpower supplyCurrent limiting resistance150Oh. LEDelectric current16mA

Available after transformer impedance conversionLow resistance8--32OhHeadphone listening

Non connected transformer can be usedHigh resistance2000-4000OhHeadphone listening

Refer to finished product drawing

Supporting circuit diagram

The kit is shown in the figureThe coil should be wound by itselfprimary3--4Sand bag line about85circle

regenerate5--6Enamelled wire approx25-35circleIf the antenna coil is wound, enamelled wire shall also be used

Without casing Battery and hornSingle tube machineWith immovable horn2P3Empty shell is more expensiveNeed to buy separately

First welding7Foot socketEnsure that the bottom surface of the pipe seat is close to and flush with the small plateCut off the protruding welding leg after welding

ReweldingLEDWhen weldingPay attention to the heightThe top surface shall be flush with the top of the pipe seatTo have a better luminous decoration effect

Final welding current limiting resistanceCut short the leadAt this pointPad for welding resistance surface

First, weld the potentiometer board vertically with the main boardWelding potentiometer

The variable capacitor shall be welded and adjusted after the small plate of the electronic tube baseIn welding

Electronic tubeFirst insert it into the upper seat of the welded small plateTie it with a tie, flush with the board

The small board of the lamp holder shall also be perpendicular to the main boardIn welding7Needle row needle

Potentiometer switch small board and large board are5Large solder jointmiddle3The first point is the potentiometerUp and down2The first point is the switch

Semicircle pad on the back of the boardSelecting short circuit and no short circuit is used to select access and no access

1.The antenna can be connected to only one antenna And winding on a magnetic rod10Coil grounding mode

2.Kit with variable capacitor223PYou need to short circuit the variable lower foot padMake the two groups parallel

3.Welding only with transformer4individualOne line2PadsWelding is intermediate8Oh The welding edge is connected32Oh

Use high impedance headphone transformer5Neither pad is shortedDirectly connect the high resistance solder joint and the earphone base with a wire

4.Earphone holder, if plugged in2core3.5turn6.5High resistance conversion plug

It is necessary to cut the solder joint of the lower sound channelTo avoid short circuit sound signal

Debugging introduction written by Tanyou teacher

2P2Single lamp generally needs good receiving environment and good heaven and earth line device

This regenerative radio usually receives bird callsThen adjust the feedback knob to reduce the amount of feedback.

The scream went out and the radio came outAt this time, adjusting the station selection knob will make the frequency more correct

The reception will be louder But it will lead to strong signal feedback and critical point howlingThen turn down the feedback knob

The station selection and feedback knobs are carefully adjusted several timesThe sound is louder when adjusted to the best

If the radio is still accompanied by howlingThat's too much feedback

It's useless to adjust the minimum feedback, so we need to reduce the feedback coil test

If the reception has no bottom noiseYou need to adjust the feedback knob to hear a bottom noise, and then adjust the radio knob to select the station

This is a feature of playing regenerative radioVariable resistanceGood adjustment feedbackThe disadvantage is poor contact after wear

Filament is a big consumer of electricityA: About 30mA

Reception sensitivity depends on signal strengthAnd the amount of feedback depending on the feedback coil

Generally, there is no problem receiving strong stationsIf the radio signal is weakSingle tube amplification capacity is limitedThere will be bird calls through feedback

However, the signal is very weak when the regulation feedback whistle stopsAlmost no sound can be heard in the headphones

But I can't say there's no radio signal

If you add another tube to enlargeThe audible radio signal will increase

Reference production article

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Frequently Asked Questions

Q: What is the 2P2 Tube Single Lamp Medium Wave Radio Battery 2P3 Without?

A: The 2P2 Tube Single Lamp Medium Wave Radio Battery 2P3 Without is a quality decor pick. filament2.4Volt power supply 7Right foot1Foot negative5Foot empty Filament current30mA.

Q: How do I use the 2P2 Tube Single Lamp Medium Wave Radio Battery 2P3 Without?

A: The 2P2 Tube Single Lamp Medium Wave Radio Battery 2P3 Without is ready to use right out of the box and makes an easy addition to your decor lineup.

Q: Why choose the 2P2 Tube Single Lamp Medium Wave Radio Battery 2P3 Without?

A: The 2P2 Tube Single Lamp Medium Wave Radio Battery 2P3 Without stands out in our decor range — Lamp low seatGlowing redLED 2.4Vpower supplyCurrent limiting resistance150Oh.