Bought one of these broken for the shaft coil and box. However when I have had a look at it there is just a broken battery wire.
When switching it on the sensitivity was very bad and a small chip of ferrite give a massive signal.
I suspect someone has had a play with the internal pots.
Did notice a photo of the 1220 has the same PCB
I have marked the 5 POTS and had a quick try.
Found the ground balance. Doesn't reject fully the ferrite but not far of.
I assume the setup is going to be similar the 1266x except without the static mode.
Turned two of the pots until a threshold sound is heard and backed them off a bit
Leaving two unknowns which don't appear to have much affect. One across the RX
Now air test 12" on a "copper" 2p and 7 1/2" on a silver sixpence.
Tested on a 10" buried Victorian penny and its an easy target even with the disc set quite high. My IDX struggles unless the disc is set to zero.
The front tune button adds a tone to the headphone but this doesn't alter
Any help appreciated
When switching it on the sensitivity was very bad and a small chip of ferrite give a massive signal.
I suspect someone has had a play with the internal pots.
Did notice a photo of the 1220 has the same PCB
I have marked the 5 POTS and had a quick try.
Found the ground balance. Doesn't reject fully the ferrite but not far of.
I assume the setup is going to be similar the 1266x except without the static mode.
Turned two of the pots until a threshold sound is heard and backed them off a bit
Leaving two unknowns which don't appear to have much affect. One across the RX
Now air test 12" on a "copper" 2p and 7 1/2" on a silver sixpence.
Tested on a 10" buried Victorian penny and its an easy target even with the disc set quite high. My IDX struggles unless the disc is set to zero.
The front tune button adds a tone to the headphone but this doesn't alter
Any help appreciated
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