Beautiful device, housing made of brass and chrome plated. the sensitivity was low because in those days it was a device intended for wealthier people. A wealthy man had requirements for the device to make as little noise as possible, so better quartz or ceramic filtration was used, but it lowered the sensitivity. In total, the 1.5 and 5W radios had a similar range, but the 5W ones had very little self-noise. Unfortunately, the antenna extension coil is inside the radio, which makes antennas with the coil outside more efficient but also more delicate. If the telescopic antenna is hard to deploy, put a few drops of machine oil in the slots of the antenna. It should be unfolded after each telescope in turn, so as not to pull it with a small telescope - thick telescopes, it's too much load and it may be torn off. The loudspeaker of the radio is also a microphone, the instructions say to speak from a distance of 5 cm or two inches, but that's too far, the modulation is weak then. You have to speak very closely. The charger is a 24V transformer and rectifier bridge, the transformer has a power of 2W. The original "Dyna Charge" charger. Inside the radio there is a resistor limiting the charging current to 45 mA. The plug is a 3.5mm Mini Jack, the plus is inside. The power supply is 14.4V 1A (12-15V according to the instructions). The DC plug is 5.0mm / 2.5mm, the plus is outside, minus inside (Japan standard). I made a mistake earlier, because the polarity of the charger socket is standard, I analyzed the diagram, I do not have the original "Dyna Power" power supply. I have a version for Germany and Switzerland, it's 12 channels from 4 to 15, unfortunately a few quartz have already died, it's cheap resonators made in poor countries like Japan a long time ago. Ni-cd and ni-mh industrial batteries fit, they are still a bit shorter, like a long time ago, this is what I wrote on the internet many years ago. The radio has silicon transistors which were state of the art at the time, this resulted in low noise, lower gain and higher selectivity/goodness of the resonant circuits. One silicon transistor cost as much as several germanium transistors. It was the reign of vacuum tubes, germanium transistors were very unreliable, very unstable. Even an increase in temperature outside could lead to their destruction. However, silicon transistors had a low transconductance (influence of changes in the input voltage on the change in the output current), which gave a lower gain despite the higher parameter h21e (current gain) It was only many years later that new resonant circuits were adapted to a new type of transistors (different proportions of impedance transformation). The sensitivity has increased. Good luck with your old CB transceiver :)
@marcreynolds7948
3 жыл бұрын
I had a pair of these as a kid. Also had the base station ac power cradle and 1/4 wave antenna on the roof. Very clear units.
@MisterBigDave
3 жыл бұрын
That was my first full watt set. Lots of good times with it!
@mikekinberg9418
3 жыл бұрын
I just got one of these for ten bucks. It has crystals in A and B. Do you put two of the batteries in that one metal tube it came with?
@KB2CWN
3 жыл бұрын
You can if you want. It's up to you
@mikekinberg9418
3 жыл бұрын
@@KB2CWN thanks. I'll also heard from a forum that AA's from the 70's were slightly smaller. They say if you use industrial AA they should fit. I'll have to try.
@KB2CWN
3 жыл бұрын
@@mikekinberg9418 That is true. But todays AA do fit with some persuasion.
@ik8rih
3 жыл бұрын
I bought a dyna-com 23, used, very well maintained (like new). I can't understand the size of the power jack. the modern 5.5 does not fit. :( :( can you tell me something about it?
@KB2CWN
3 жыл бұрын
Don't know. I never used a power supply with it. Strickly batteries
@bradleyfishel4233
2 жыл бұрын
Radio Shack autoplug letter L should fit, on my 3b the outside sleeve is positive and the inside sleeve is negative. Hope this helps.
@arkadiuszweiss
Жыл бұрын
It is 5,0 / 2,5 , plus is outside. 14,4V . Tolerance 12-15V 1 Amp drain max.
Пікірлер: 12