I've noticed R46 is 47k, should be 4,7k.
Regards
Actually, no. Or rather, not necessarily. I have seen it listed both ways. Even on the Univox schem it is listed as 47k. But, I have also seen people put 4k7 there. If there is a consensus that the 47k is incorrect, then please let me know and I will make a note of that in the doc.
However, you bring up a good point because it is another way to address "brightening" the lamp. I mention in the doc that I found that running the Harbinger at 9v with the charge pump seemed to result in a somewhat less intense lamp, and to socket Q13 and sub a Darlington if you want. The alternative here would be to reduce R46 to 4k7...I believe it would have more or less the same effect (something I have not experimented with, honestly).