Well, if we had a confirmed frequency and location, it could be put in the database.
Looking back on ancient submissions, someone had named Site 7 as Wilmot in Waterloo County with a frequency of 420.7500. Why it is not there now, I'm not sure.
using what is available on TAFL. I find 420.400 is licensed in Bright ont. The same company owns 420.1125 in Ilderton which is a lot closer to Strathroy and would match the signal results I saw for the 420.4000 freq.
I would agree that Ilderton is a possible location. I was working out that way today and had very poor reception on this site in Strathroy, and it does indeed get stronger north of the 402. I was thru the Coldstream/Denfield area (fairly close to Ilderton) and had very good signal there. Wasn't able to observe any activity on the site but the neighbours are sites 4, 5 and 6.
I was in Stratford yesterday and mostly lost the signal East of Richmond/Highway 4 when I was on Elginfield... Likely around Highbury/Whalen Line area. I had about 3 bars on my SDS in the Ailsa Craig/Narin area but it was definitely stronger towards Ilderton.