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MikeM <mmaghakian@...> added folder /7 - FRG-7 Mods/Mods from Ed Shaw The following files and folders have been uploaded to the Files area of the [email protected] group. By: MikeM <mmaghakian@...> The following files and folders have been uploaded to the Files area of the [email protected] group. By: MikeM <mmaghakian@...> The following files and folders have been deleted from the Files area of the [email protected] group.
By: MikeM <mmaghakian@...> |
Unkown speaker related switch
Fellow Frogers,
? Just picked up a new-to-me FRG-7 and noticed what seemed to be an unkown mod consisting of a DPDT slide switch (S-7) w/ two? resistors (R-18 & 19), connected to the internal speaker. But surprise, some of the schematics show these components in the lower right near the speaker.? However, they are not on the parts list, nor are they mentioned in operating / calibration instructions or circuit description.? There are no related labels on chassis or cabinet. The switch is physically attached to a frame brace in the upper right rear of the chassis, just below the white battery plug/socket.? Switch is poorly positioned and clearly not intended to be accesssed often or easily.? The resistors are either switched out of circuit, or placed in series w/ speaker: one between audio & speaker, the other between speaker & chassis gnd. The only in-circuit effect seems to be some lowering of the volume. Serial # 300585 and apparently this radio lived in Canada at some point. Any idea what this undocumented "feature"? is about? |
Re: Looking for main tuning knob.
Thanks, Lex, for that 3D-printed knob design. I was lucky enough to find an original knob on eBay. Also, thank Cesar for your reply. This is one neat radio. I am researching a suitable AM transmitter to get more out of the one AM channel. I might consider building one from scratch and looking into a loop antenna for the USB and LSB. Does anyone know if this receiver had a transmitter that went with it, like the FT-101 FR-101? Or was this just a stand-alone unit?
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Re: Looking for main tuning knob.
The knobs of the first model FT-101? look like the on a FRG-7. But the knobs you are pointing to in the e-bay link are from the newer models of the FT-101 (E, ET, Z, MD etc) and look like the one's used on a FRG-7700. 73 Lex PH2LB? |
Re: Looking for main tuning knob.
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El dic. 10, 2022, a la(s) 11:44 a.?m., Andrew <frelund.andrew@...> escribió:
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Re: Looking for main tuning knob.
Hello Andrew, These are very hard to come by. I had the same problem and often 3D print parts, I designed my own (as close as to the orginal as possible).? ? 73 Lex PH2LB? |
Re: Digital readout
Mike M. See the link below which has my review of the Electronic Specialty Products DD-103: I installed this display on my Yaesu FRG-7 this year and it works nicely.? Not cheap, but well made.? It also works on many other receivers. Bob B. On Mon, Sep 12, 2022, 12:58 Roger VE7LB <Roger_VE7LB@...> wrote: Hi Paolo, |
Re: Digital readout
Hi Paolo,
?Thanks for the display info. I copied your pdf's over to the files section and added translated english versions as well:? /g/Yaesu-FRG-7/files/6%20-%20FRG-7%20with%20non%20GAR-7%20Digital%20Readouts/Paolo%20Viappiani%20Display? . 73 Roger VE7LB Group Owner |
Re: Digital readout
Hi, please look at the attached articles (unfortunately they are written in Italian, but almost easy to be read).
Good work, regards! Paolo Viappiani FRG-7_Viappiani.pdf
FRG-7_Viappiani.pdf
FRG-7 over-range Viappiani.pdf
FRG-7 over-range Viappiani.pdf
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L101 pin not soldered
I just took delivery of a fixer upper FRG-7. I did a full alignment but was still disappointment with the results of this receiver. So I put in on the bench and found that L101 (4 coils on a rod after the RF AMP) the first pin was not soldered to the coil wire. See picture:
After soldering I am now getting a 20-30 dB improvement in reception. At 1.5 MHz -55dBm gave me S9 before soldering now I get -78dBm giving me S9. I have a question do others have this coil not soldered and only wire wrapped. I am just curious if this was Yaesu's manufacturing process or if this was just forgotten to be solder and thus a defect. This is my first post so it might take time to post. Thanks for your time. Bruce, WB6IZG |
Re: Another 3D printed knob for the FRG-7 added to my collection.
Great job Lex,
I have two suggestions: I believe that spun replacements for the metallic inserts are available from restoration places but may have to be cut to fit. If you use ABS in black you can soften or eliminate the printing lines with an acetone cloud in a plastic bag. John KC9OJV |