Total Recall substitution questions

[mybud]

Hi folks: Seeking some guidance for the impending build above, as follows:

I've struggled to find a 240R 1W resistor for the power supply. I have 220R 1W instead, which all measure closer to 220 than 240. Is this sub ok? Other possibility is to wire 2 470Rs 1W in parallel to get closer to 235R approximately but this will obviously take up a lot of room on the board.

The 240pF cap is also proving elusive, unless in large multiples (25 at a time, which seems very wasteful). Closest I could get was a 220pF MLCC measuring 229pF (just within the 5% tolerance called for). Will this work, noting that I have a 250pF mica cap on order as backup? Thought of socketing both of the above in any case. Any advice gladly received. TIA.

[mauman]

Both of your substitutions are fine.  Here's my reasoning.  The main point for the 240/220 ohm resistor is that it's 1 watt, and you have those.  220R is close enough, it makes a low-pass filter with C42/C43 and protects the regulator.  The 229/240 pF cap is within the specified 5% tolerance (most caps are +/- 20%) and is well above the minimum required to maintain oscillation, which is around 100 pF.

<edit> No need to socket the cap.  If you have an inventory of random parts, you can parallel two or more caps and their values add, so your 229pF + 10 pF in parallel = 239 pF, if you had a 10 pF...   but 229pF is fine for now.   And DO NOT socket the resistor, it's carrying significant current which is why it's 1W, so you need a firmly soldered connection to the PCB.   

[mybud]

Thanks @mauman. Appreciate the speedy reply.