Can someone please tell me where I can find the details regarding MOD3089 for a 7704A? I was perusing one of the PDF scans of the service manual and notice there are several mods that seem to relate to the Guernsey versions of this scope, one of which is MOD3089 which changes R3468 to a 953-ohm resistor.
I have had problems getting the vertical positioning as close to correct as I can and one of the ways I did that was to place a 1k across R3468 (a 1.8k) which has helped that a bit. It makes the character height a bit smaller which keeps them both from being at the very top of the two graticule lines so I would be interested in knowing the details of that mod.
Thanks,
Barry - N4BUQ
