Im trying to recieve KCTV (Korea Central TV) from North Korea for archival purposes. It isnt archived properly anywhere and any a general lack of *public* non paywalled content without frequent outages available
Hi Marc, I think we have corresponded before!
I've been receiving KCTV from Intelsat 21 since 2016. My main dish has been a 2.4m dish and the signal strength is sufficient. A 90cm dish will struggle on KCTV. The signal is not very strong and there isn't much error correction on it. You will possibly receive the NHK transponder because of the generous error correction, but probably little else.
Earlier this year I had to upgrade to a 3m dish due to 5G interference. I'm not sure if Canada has reallocated C-band spectrum to 5G as the US has done, but it meant constant break up on the 2.4m dish. The 3m dish is larger and gathers enough signal to once again provide stable reception of anything above 4GHz.
Here's the difference between the dishes.
A 90cm dish has an area of 6,362 cm².
A 2.4m dish has an area of 45,239 cm²
A 3m dish has an area of 70,686 cm²
So, a 90cm dish has less than 10 percent of the surface area of a 3m dish to collect the signal, it's a huge difference.
You can buy an LNB from Titanium Satellite that includes 5G filter. If the dish is designed for C-band, which is unlikely at that size, you can fit it and have a try. If it's an offset dish for ku-band, you'll need to find C-band adapters and almost certainly will not succeed.
It is sometimes possible to find people giving away old C-band dishes, and that is how I got all of mine. But you still need someplace to put it.
Sorry it's not better news.
Martyn