开云体育

Hi all, I obtained a FRG-7 which is in working condition but needs still a lot of attention.

An extra PCB is added and I really do not know which mod this is. I hope you can help me!

There is also a lose red wire which could be connected but.....first I would like to know what mod this is so I can find more detailed information and connect it the way it should be connected. They also modified the power with a 7812 and....cut of the external 12V cabling. Cleaning rotary swithes needs to be done and....

Does anyone recognizes this?

best 73' s
Kees
PA1CJT

what is the part number on the IC on that board
this mod looks like it was done in the 1980s

Hi Kees,
Is that an RCA CA3011 IC? The board looks like an aftermarket 455 KHz improved filter board. Maybe someone has seen it before.

73
Roger VE7LB

I have seen many filter upgrades in an FRG-7 but never one like that, also I do not see any ceramic or mechanical IF filter

Is there a front panel or any place where there is a switch to engage/disengage this mod board ? It does appear that the front panel mode switch is used. perhaps the ANL position switches in this board and it is a noise blanker

see if the board is routed through the ANL position of the mode switch

That add on is an NFM demodulator, this radio has been used as a tuneable IF for VHF convertors..