THE MODIFICATION FOR MORE POWER FROM THE ZODIAC M8000
This article is for people who want to get to the bottom of the M8000. Now I get from a watt more, no special thrill, because it does not make much difference in distance.
For me another problem plays a role. After a long QSO via phone, ran my power of 4 watts to 2.5 Watts back and since I have 22 feet RG-58 C/U I have only 1.5 watts over at the end of the cable.
This I have tested with a dummy load. A dummy load is a resistance of 50 ohms which gives the same SWR as an antenna, but only locally to receive. This dummy load also prevents unnecessary interference when testing your tank.
Now it appeared that one watt difference between channel 40 and one was. First, I noticed that the part of the output transistor was completely canned, and therefore it may be hard lost heat.
Probably had the heat influence on the reels, and other components. Here we can learn to live with, but with a half Watt output cable grieves me. Now I have found a solution for that after viewing the schedule.
First, the adjustable potentiometer setting called: turned all the way down on the print RV103, which gave me 3.5 watts in place of the 2.5 watts.
Then I pulled the coil L203 something with the nail joking apart that delivered me a total of 6 watts on. Directly with dummy load , and the power meter behind the RX/TX. But since I have no problems with the regulations.
I want to have this ability back regularly with the RV-103 adjustment potentiometer to 4 watts. And it sometimes happens that the man who more than a hundred of these containers a day should adjust in the factory, which sometimes pays too little attention to the alignment tool procedure.
Then you can do the following as power is concerned. The three bobbins L204, L208, L209, L210 adjust. It may be that you can not find on the print indication of L204. That's right, because here 's a big tin house around it, the back of the RX and TX.
This can be adjust by opening the back of the house looks RX and TX. Before you go do this, I must warn you of the following: More than 4 watts of power, is contrary to the regulations can be fined for getting here and your bak lose and everything to possibly stuck.
Never use a metal screwdriver to calibrate the ferrite core particles nine times out of ten, and this is quite a difficult job to get it back out of the ferrite bobbin.
I use a screwdriver made of excess printing plate is sharpened with a file. This should be a good fit in the ferrite groove. Place the tray on channel 20 well in the middle of the tire and use a power meter SWR preferably ten watt range.
Torque and a 50 ohm dummy load to the antenna input of the power SWR meter. Do not settle on the antenna because you can sometimes deceived. One has done all of this , one can begin to coil L210 to adjust.
At maximum power and then on up to L209 and then L208, L204 and then. And now RV -103 adjustment potentiometer adjust to maximum power. Here 's to me a drop of glue on the metal disc can be controlled with a puntbek pliers. Take some time the 13.8 volt plug, so make everything equally energized.
L203 and then something with the nail off not doing this with a sharp object otherwise damage the paint around the bobbin thread. If one has done this , one can again coils L210, L209, L208, L204 adjust, at maximum power.
Also check on channel 1 and 40, which the power meter indicates, this difference is more than a cotton one will have to find a compromise.
On the receipt, I also want to say something that appeared after adjusting not be sensitive enough to me, at least. Similarly, the audio was after adjusting the intermediate frequency better not come to L302, it is always locked, and always good unless he does not send and or receive.
Now I know that almost no one like me, has no measuring station but at the hearing it is also fine. They are looking for a weak signal station on talking, near channel 20. Did you find it, then it regulates L101, at minimum noise and maximum receipt.
Then the coils L102, L103, L104, repeat this procedure at least two times. An overweight S meter indication via LEDs what can we do about this one can set potentiometer RV-101 adjust to desired strength.
Too soft modulation: One can arrange for this with RH-104. Not control the audio rip off in connection with the sweep otherwise have people in your area bothering you, the adjacent channels. The squelch strength can be adjusted with RH-105.
This was a long story, and I hope all Zodiac M8000 users have done with this article. Great pleasure one is not satisfied with the quality of the audio reception then you can send me an email and I will send you an e-mail with the information.
Would you after reading this article and to adjust its gone I want to send the experiences an email. All these methods have been perfect alignment tool with me. And do not forget any damage that I can not be the author of this article recounted not expect to do this so entirely at your own risk.
