General version of the 8718A and mahjong version 8718A/MFP Competition


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Said to be two machines, in fact, that is, 8718A and 8718A/MFP
MFP word is translated into Chinese tiles, the Americans could not hear clearly, MJP wrote the MFP.
Contrast a bit, with the antenna splitter, speaker headphone plug to unplug a, heard of any difference, of course, the result?
A seems to feel a little quieter, but uncertain, perhaps suggesting that the black panel to bring?
North of the tiles was significantly better state of preservation, both inside and outside the net are the new, south of A will almost, some of them are rusted.
The most strange thing is a pointer to play mahjong with no signal in A major, but exactly the same sense of hearing, the board may have changed the plug again, has not changed. Within these two machines is almost as many boards, too, put together two sets of almost no fear of bad, bad in fact is not afraid, I heard that parts are very good buy.

A nice way or a little, like receivers, it is the feeling of cattle, tiles more like a single instrument? Operate entirely tiles convenient, according to two health can jump their favorite band, and then slowly find Taiwan, or simply direct frequency entry, A must stop the transfer, although it could turn very quickly, always trouble, but they can in turn pass the boring time, aimlessly looking for the unknown wave, really each have their own beauty.

The sound is still very good, 3KHZ listening to the radio bandwidth are very similar to their own tastes, heavy, just what can be listened to, 6KHZ already feel a bit wide, not like a clear treble sound, very easy to listen to amateur radio, of course, is Communication is good.

I heard that tiles can control A, there is no cable to try the second machine is really enough to put together the Competition
And radio more than unfair, received a radio antenna on the roof of the possible banning federal funding of the radio, not war on the upturned, so nothing is like, of course, is the tiles are in the world.

And 70-2 ratio is very interesting, after all, is a machine, remove the antenna between the sensitivity of certain frequency bands is not too much difference if, once the war extended to 0-30M, a whole lot of wins or 8718, operational Jiubuyongti, a 8718 is equal to two sets of 70-2, still seems pretty fair.

No later than the end how much interest, the radio receiver if the fun on this point, more easily tired, have a favorite play hello, maybe some time on the shot, or two sets with the out, leaving only the tiles or .

8718 are used in the old parts, CPU board today to get the wholesale IC company, 74C374N has no, HC374N and LS374N each took five, very cheap, can try the next LS374N substitution, other IC also it seems possible to find the things that can be substituted,

Do not know these different IC for receiving what kind of impact, said the speed is different from the CPU board receives the control point of view, it will certainly affect, have found that when an IC is not good when the normal receive AM, SSB received on disorders, the sound sharp change can not hear, put on a good IC symptoms disappear.

74C374N If the hands are original, or which can buy what, please help, want to try these new ones all the results of IC happen. Other IC CPU board would also like to try the same, there are 8718’s enthusiasts can try.

Mahjong 8718 is very strange, automatic scanning is 2,4,6,8 …. so even channel scanning, and automatically back to 86, who in turn scan noticed 1,2,3,4 ,…. , and do not know what the future become so healthy by the scan dwell time it touches zero seconds to nine seconds adjustable, such as automatically after 5 seconds the next frequency.

There is also a function of very interesting, EXAM, do not know how to explain continuously according to the health can be beat to the desired frequency, then rotate tuning knob, the frequency change instruction, the actual reception frequency is changed, this feature can be used in our time and hope to receive a frequency look up and down the table and see what other.
What other features are currently not understood

Critical reception, 8718 is not a common fancy features amateur machine, even when the SSB receiver IF bandwidth is fixed, but the basic performance has certainly impressed

Very quiet, no radio automatic gain state at 70-2, while not as dark and quiet as no sound, but also a lot quieter than the Japanese amateur machine, no need to deliberately open the small RF gain

Selectivity is high, SSB, although when the fixed 3.2KHZ IF bandwidth, just try the next 7048 and 7050, very little interaction. This machine can be received in the CW SSB, this time … IF bandwidth is variable 0.3,1.0,3.2, AM, when the same, so the actual very easy to use.

Particularly want to say that the sound quality, whether it is to receive AM radio or SSB, is characterized by clear natural sound, the frequency is very accurate, basically you can easily use the KHZ block out the natural tone of voice, do not have the 100HZ file to fine-tune, also shows the current amateur radio frequencies are very accurate.

There is also a good place that is just said automatic gain control, AGC speed of second gear only, do not know does not work in FM mode from the other modes are done very well, my favorite receiver in the slow block wave radio, multi-medium wave signals, the signal level ups and downs, with slow-fast transfer station to block good to reconcile this situation, not noisy, they can quickly find the desired signal, the feeling is in the use of advanced conventional radio However, tuning the structure of feeling better than cable does not know how many bought the last time a radio they immediately changed hands, that tune feel really bad, now used only 222 of the tuning machines can handle more than one .

Although these machines have been retired, such as small problems, through careful maintenance can still have outstanding performance, professional machine to itself is known for reliability, the amateur 59 plus 30 machines at every turn, if the receiving strong local AM station estimated S tables are full, the table is not the same as 8718, the pointer up to the 2 / 3 relaxed swinging.


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