[ARC5] JFET in ARC-5 TX oscillator socket

[mstangelo at comcast.net]

Mike,

Ah yes, the RCA 3N128. I remember when QST had a cover article about using that IGFET in a low drift VFO.

You know you're getting old when you remininse about discrete semiconductiors!

Take Care,

Mike N2MS

 ----- Original Message -----

From: WA5CAB at cs.com

To: mstangelo at comcast.net

Cc: ARC5 at mailman.qth.net

Sent: Wed, 8 Jul 2009 23:57:31 +0000 (UTC)

Subject: Re: [ARC5] JFET in ARC-5 TX oscillator socket



Lord, I don't remember.  I was either a Senior or a first-year Grad Student at the time.  Maybe 3N128?  That's an IGFET, isn't it.  They were brand new at the time.  I designed the circuits and wrote an IEEE student paper about it but never actually butchered the SP-110-LX they were to go into.





In a message dated 7/8/2009 6:47:27 PM Central Daylight Time, mstangelo at comcast.net writes: 



I realized the tongue-and-cheek remark but you brought back memories of my early parts scrounging days. FET's were relatively new on the hobbiest market and I was lucky to find them surplus.





Anyway , I found my old catalogues. Barry's "Green Sheet" has 1625 at $3 each and 1626 for $1.40. G&G does not have the 1626 but has the more common 1625 at 50 cents each. He also has 6V6G's for 75 cents each.





The only commercial JFET I know of in the $15 range are Crystolonics JFETS used in Active anbd Broadband amps.  JFETS are mostly small signal devices these days and are inexpensive. The power MOSFET's are the expensive one these days. Which JFET did you buy?





Mike N2MS





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