Quick 2SK117 Question

[BaLaClavaAa]

I am building Supersonic's Rat Mod, and I was wondering what alternative transistors I could use as I can't get the 2SK117.

[sfx1999]

J201 or 2n5457 should work.

[BaLaClavaAa]

Thanks 

[grolschie]

I am told that 2SK117's are really good. What would the improvement be over the stock BF245A?

[5thumbs]

I am building Supersonic's Rat Mod, and I was wondering what alternative transistors I could use as I can't get the 2SK117.

If you need/want an exact match for the 2SK117, the 2SK30A is a good option.  I had a recent pedal rehab project that needed replacement 2SK117s, which I could not locate for a reasonable price.  I found NOS 2SK30As at http://www.effectsconnection.com/oscommerce/product_info.php?products_id=215 for $0.30 each.

You probably don't need an exact match for the 2SK117, so the aforementioned JFETs will likely work fine.  However, if you find that you need/want an exact match, the 2SK30A will work fine and not break the bank in the process (at least for the time being.)

[slacker]

The fet in a Rat is just a buffer, so it's unlikely that one will sound better than another.

[BaLaClavaAa]

not break the bank in the process (at least for the time being.)

Aye aye, right now I'm at $48.85, trying to keep it under $49 to avoid another $2 shipping ( I'm not particularly high on cash =P)

Thanks for your help 

[R.G.]

2N5485 and 2N5292 are fairly exact replacements if you can get them. Pinout is different.

The 2SK117 is no longer in production except by special order last time I checked.
The 2SK30A IS in current production as of a few months ago, as the "K30A".

J201 and 2N5457 are not exact replacements except for odd selected ones at the edges of the distribution.

[sfx1999]

They aren't but the original transistor is used as a voltage follower in the circuit. This circuit is here -> http://www.illuminist.tk/

[ubersam]

Would the 2SK184 or the 2SK170 be suitable substitutes for the SK117?