Another necrobump, hohoho. Many non-emulated expansion recordings available here:
http://famitracker.com/forum/posts.php?id=3633

I know this thread is a bit old, but I just thought I'd mention I've begun making and archiving Famicom hardware expansion recordings here:

http://nesdev.parodius.com/bbs/viewtopic.php?t=8639

As for this, I have considered that the RF adapter can induce a TON of noise into the works. There are also lots of old caps in there just waiting to fail/already failed. I'd still talk to Batsly, but eventually it would be very cool to be able to make a device which replaces the internal RF box entirely, adding a quiet DC-DC converter etc. Have you tried using a DC power adapter instead of the original AC? A new one?

Replacing the power supply may help. Talk to someone like Batsly Adams. He can steer you in the right direction.

it's definitely the NES because it's there when i'm not using a TV at all. it's not there when i'm playing the NSF but it's unreal when i'm just on the menu pages of my powerpak.

Double post I guess, but...
You may well be getting some ground loop feedback from the TV. There are ways to correct this, but they're pretty involved. I'd say, try it quick with another TV perhaps and see what happens. If the buzz goes away, you know it's the TV, if not then you know it's the NES.

BTW, expansion volume levels actually vary from Famicom to Famicom depending on mobo revision and even how clean the cart contacts are.

this hiss buzz is unbearable. is there any way to get rid of it?

i guess i might have to install a switch afterall, guh.

Speaking of famicom/ expansion volume levels (since I know nothing about the RF -> RCA mod), is it possible enso's modded famicom has "improper" volumes itself? Or should the mod on his system not screw that up? I was also surprised how loud the expansion was.

i want this soooo bad. i am soooo desperate to see chris to release this.

this is a good call. i need to get a new nes tho cus mine is becoming full with all the mods i did without properly thinking about placement.

i actually installed a pot on mine instead of a resistor - after listening to enso's famicom, i realized how much the emulated sounds were at the wrong volume...  so i can just dial it in.  i'd rather trust my ear than some predetermined sheeot - different versions of famitracker were inaccurate too.

Sorry about that! I don't have the noise on mine. It may be because I modded my x|k prosound NES, which has a separate power supply and other measures to prevent that shit to begin with..

yep, i've got this noise too. i might install a three way switch though, to turn the mod on and off, just like in that video, and then to use the independent jack i installed.

Cool, man!

Now, load up Gimmick (Japanese version) and listen to one of the best Famicom soundtracks of all time! It uses the FME-07.

Hold Select and then press Start (on title screen) for a sound test, too.