First see if your old Minitiouner V1 is working with a PC or Portsdown?
Now the final blow to it - cut out the old tuner so you can desolder the remains (no need if you used a socket)
Solder (socket) the new tuner from BATC shop (https://batc.org.uk/shop/serit-ftm-4762-nim/ ) leaving pins 3,5,6 and 7 bent away from the board. (or if you have sockets you have to alter the tracks )
Connect pins 5 and 6 to ground.
Now add 150k resistor in parallel with R5 (I used two to make up the value ).
Now all that is needed is to reprogram the USB device!
It took a while to work that out but it does work.
Here are some receiver photos..
333kHz and 1000MHz with testcard and PiCam
I also used IPTS in as the encoder at 1000kHz Bandwidth and a 2000k stream input. This worked but with a very long delay (up to several minutes! Where does all that video get stored? )
Must get around to putting it a case this time...
Here is the modified Knucker with the old cut out tuner near a couple of Rydes:
Here you can find details of your old V1
and here you can find details of the Knucker:
From the two pages you can find the circuit diagrams and differences and also a guide to reprogramming the USB interface although more info is on this link:
And finally here is the link to the inspiration for my experimentation:
One other thing I found was that the USB would only program with power supplied to the board.