This manual is downloaded from the FoxTango site, Yaesu. FRG HF Receiver. Survival Guide. Revision 2 march. If you want to work on your FRG, it is a must to have the manuals and schematics. See: The manuals are very informative and deal. The purpose of this manual is to provide the reader with information critical to the nance of the FRG general coverage communications receiver.

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The general alignment can be done as described in the manual, with the proper tools and equipment, it is a straightforward job. The counter displayed only a right-hand zero, the clock was partially working, the AM Led was on all the time, the ON and OFF timer had the same time, only the countdown timer was working.

It is really necessary to remove the power cord, otherwise you do not remove all the power, with disastrous results. The power supply works fine, and stays fdg-7700 cooler than the original one. The source for trouble is the rectifier, who becomes very hot, so hot mqnual fact that in one case the wires to the transformer caught fire, and the condenser exploded.

Yaesu FRG-7700 Instruction Manual

If your display goes weak, you can solve the problem temporarily by removing the orange filter in the display window. Remove the power cord first!! The Xtal oscillator was working and at the good frequency. The administrator has the right to edit, move or remove any comment for any reason and without notice.


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Yaesu FRV, Yaesu FRV VHF Converter for FRG

Standby 10W 10W ON: These terms and conditions are subject to change at any time and without notice. On this site are also modifications, pictures, descriptions and more. So I took the VFO out the receiver, a very easy job, although it means the removal of all knobs, scales and front panel.

Yaesu uses a amber filter, to change the color in the style of all their equipment of the time FTZD, FT This tube has a filament, and has in the long run the same problem as all tubes: This explains the difference in frequency as you are listening to a ham net on a nanual frequency.

Change the band switch to the 29 Mhz band and adjust T for a reading of 7. Change the band switch to the 20 Mhz band and adjust T for a reading of 7. You see seldom a R with a display failure, because they use a different board layout.

Your Frog has then a very bright green display, that will again last for frg7700.

Another very good source for free manuals is http: It is possible to remove also R 10kbut the gain and noise of mnual 2 nd IF will raise to high level, and can cause oscillations. Yaesu did it the cheap way here, a spray of metallic paint over the plastic faceplate and that is a pity, because it is very difficult to repair.


Free Service Manuals

Another is 1Fthis receiver is made in June Most of the time the problem is a loss of the frequency coverage, usually at the end of the tuning scale. The receiver is very sensitive and stable, and has a pleasant audio.

I mounted all on a piece of epoxy experiment board, see the pictures and schematic below. Removing the paint altogether from the sides is also a possibility, it can be done with thinner and rubbing with an old cloth, you have just to be careful with the front itself, the paint there is quick damaged.

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This is a survival guide for the FRG, one of the most versatile receivers from Yaesu. Dial lamps are long lasting, but they have to be changed now and then. With the condenser manuual open I had a frequency of around Khz.

Failure to comply with these rules may result in being banned from further commenting. You can change the IF filters for better ones, a recommendation I did not change any: After studying the circuit diagram I found that the Memory Fine control is nothing more than a voltage divider, the frg-7070 is used to tune a varicap in the memory unit.