Do NOT use MPF-102 in the ASM-1!

[Christopher_List at Sonymusic.Com]

  Hi Guys -

  I must humbly issue a recall on my statement last week that the Radio
  Shack MPF-102 can be used as a substitute for the 2N???? / NTE466 FET in
  the ASM-1 VCO.

  The MPF-102 is a FET and does have the same pinout, but it is not the
  same.

  After building a VCO, I was having a problem with the output level of the
  sawtooth and didn't think it had anything to do with the FET. I mean it
  was working and tracking and making sawtooth waves. I put it down for a
  few days, came back and tried it and it wasn't working at all. Testing
  showed weird results and the 3140 was dead. I replaced the 3140 and -
  just to be sure, replaced the MPF-102 with an NTE466. This worked great
  first try and has worked fine ever since.

  I'm really sorry if anyone followed my advise and got stuck -
  Get a NTE466 or something else as a replacement.

  - CList