Hi Steve,
Generally there is no need to use shielded wire for control voltage connections and power supply leads. They are OK bundled together.
I would not run any cables thru any high power RF tank "hot spots" and final amplifier areas without shielding, however. Though, I have never shielded my meters in any rigs, even the big rigs.
The final RF tank area should be clear of wires except for the HV feed and plate choke as well as the C2 loading coax.
All low level audio should have shielding but high level modulator wiring needs no shielding.
Generally, bypass caps in the sensitive areas will take care of things. Cathode leads need proper bypassing but can be unshielded.
If in doubt, running a twisted pair for metering and other leads helps.
I have built a lot of rigs, both big and small and rarely have a problem with instability or RFI issues. In your case, keep the RF tank section shielded as well as the lower level audio and you will be fine. Enclosing the RF final area is a good idea, though not mandatory on some layouts. BTW, notice that many of us run our RF final tubes next to the modulator tubes in a viewing window. Even so, any high level coupling problems are minimal.
But all in all, I'll bet you could run that rig without aluminum shielding in the RF area and it will still work FB. Just route the wiring far away from the RF - by snaking the bundled wires along the chassis and cabinet edges and corners.
Maybe we are still overly influenced by the old 10M / channel 2 TVI days, I dunno. Look under an old 1950's Ranger - at all the input chokes, bypassing and shielding and you will see what I mean. Few go thru all that trouble anymore...
T
