The FRG7 has around 12 turns of the tuning knob to cover a 1 meg band segment, pretty fast, requiring the finesse of? safe crackers hands to tune in that ssb station, especially when the machine hs been fitted with narrow filters.
Here is a very simple mod to slow? that tuning speed to 75 turns band end to end.
Remove the central plastic tuning dial from the kilocycle tuning capacitor, held on by one central nut, careful maneuvering? under the S meter will see it free.
Remove the three wires from this capacitor, remove the main tuning knob and carefully lift it out.?
?Buy? a ball reduction drive, these can be got almost anywhere, and eye up the space available after removing the front facia plate.
Two 2.5 mm holes are drilled into the front chassis to mount the added ball drive in line with the existing tuning shaft.
The existing tuning shaft will need shortening, use a hacksaw.? Measure carefully.
The radio can now be reassembled. The kilocycle tuning capacitor can now be slid back into the existing cavity another 15mm or so, and new mounting holes drilled to reattach it to the chassis.
Reconnect the three wires to the tuning capacitor.
The dial drum is now too small. I found a plastic jar lid? the right diameter and drilled through the center to mount it to the shaft.
Masking tape around the edge can be used to mark the 100 and 10 kc increments accurately as the radio is tuned, then this is transferred to a drawing program to make? A professional looking dial..... Im still getting round doing that part.....
Tuning is now so much easier, and the fine tune is no longer needed..
Originally, the kilocycle tuning is mounted forward toward the front panel as here.
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After the mod, it is mounted toward the rear, you can see the added ball drive on the front panel...
