[oldticktock]

Re the tagboard, I've been giving that some thought.

Eventually when when I do have to get in under there are 4 caps,
C16
C20
C26
C8

There are 2 resistors R28 & R39

Option 1:
Unsolder 32 connections top and bottom, unscrew the tagboard and refit new underneath. Re-solder connections.

Option 2:
Unsolder 18 connections on the top row and gently swing down the tag board allowing access to replace cap, re-solder connections.

Option 3:
The one I'm seriously considering. I can see both ends of the 4 under side caps, I believe I can snip out these caps without unsoldering any wires and withdraw them, C8 is the only one likely to give a fight. Then I can mount the new caps on the topside, insulating the wire ends. This seems a better option and runs the least risk of disturbance. If the resistors are needing replacement then they are easy to access as well


Conclusion:

Option 1 has the greatest risk of error but is the most thorough
Option 2 reduced risk, but still a risk of introducing error
Option 3 minimal risk just need to ensure connection points underneath match topside tag points

I can only think the Bush designers did not mount the 4 caps topside due to their size, now with same value but smaller caps, these replacements can easily be accomodated topside.

Chris