EMRFD Message Archive 11273
Message Date From Subject 11273 2015-07-02 10:19:56 n2msqrp Are through hole devices going the way of the vacumn tube? I usually compile a list of parts for various projects and order from Digikey or Mouser.
I wanted to order J309 fets in a TO-92 case to supplement my stock. Neither distributor had them in stock; one quoted me a price of $4.00 each!
Apparently the semiconductor manufacturers are discontinuing production of through hole devices. I picked up some SMT versions while they are still available.
If you see thru hole devices at a good price online or at hamfests I'd recommend picking them up.
Mike N2MS
11274 2015-07-02 10:34:46 bob_ledoux Re: Are through hole devices going the way of the vacumn tube? 11275 2015-07-02 11:12:27 Cecil Bayona Re: Are through hole devices going the way of the vacumn tube? I been doing that for over two years, unfortunately I was unemployed for a while and that cut down the amount of stock I could purchase.
Two other items are going the way of the Dodo which we use in building radios, leaded ceramic resonators, and Ferrite cores.
11277 2015-07-02 12:00:29 Thomas S. Knutsen Re: Are through hole devices going the way of the vacumn tube? I usually compile a list of parts for various projects and order from Digikey or Mouser.
I wanted to order J309 fets in a TO-92 case to supplement my stock. Neither distributor had them in stock; one quoted me a price of $4.00 each!
Apparently the semiconductor manufacturers are discontinuing production of through hole devices. I picked up some SMT versions while they are still available.
If you see thru hole devices at a good price online or at hamfests I'd recommend picking them up.
Mike N2MS
11278 2015-07-02 12:33:21 K5ESS Re: Are through hole devices going the way of the vacumn tube? Try BGMicro
They have J309s for $0.71 and J310s with short leads for $0.30. Other cheap transistors as well.
Mike K5ESS
11279 2015-07-02 13:44:32 Gene W5DOR Re: Are through hole devices going the way of the vacumn tube? Hey Ya'll. I have too many J310 TO-92. I have 3 batches of 100++ . One batch labeled ON Semi. Another batch labeled MFG. FSC and another labeled Fairchild. I'm getting on up in years and know I won't be able to use all these J310's. I'd be glad to let small batches of 10 or 25 go for $0.25 ea plus postage. I feel like most of these came from Mouser cuz that's where I buy most of my stuff.
Gene, W5DOR
gene@w5dor.com
11280 2015-07-02 18:34:36 Dana Myers Re: Are through hole devices going the way of the vacumn tube? 11284 2015-07-03 08:46:48 Alan Jones Re: Are through hole devices going the way of the vacumn tube? Hi Gene,
I will take 25 J310’s off your hands.
Just let me know how much and I will pay you via paypal if you wish.
Thanks…
Al, N8WQ
11285 2015-07-03 09:47:39 Gene W5DOR Re: Are through hole devices going the way of the vacumn tube? Al,
I do have enough left to send ya 25 J310. You will be the last person to get them because I want to keep a small amount for my own work and I've already made up 11 bags of 25 ea. . Is your address on QRZ.com good to use for a shipping address??? If not please email me a gud address. I want to get $0.25 per device and its about $1.20 to ship in a good padded envelope.
25 x 0.25 = $6.25 plus postage of $1.20 = $7.45
Please post to the EMRFD group your progress on any J310 circuits. I'm currently working on a receiver that uses a diode-ring 1st mixer so I need a little bit of gain in the front end. It'll look sortof like the front end of the SS-40 receiver by 4SQRP Group. http://www.4sqrp.com/SS40.php
Gene, W5DOR
gene@w5dor.com
www.w5dor.com
11286 2015-07-03 10:47:25 Lee Hiers Re: Are through hole devices going the way of the vacumn tube? Arrow has J310G for under .08 each....nothing showing for J309.
73 de Lee, AA4GA
11287 2015-07-03 12:26:24 Jim Strohm Re: Are through hole devices going the way of the vacumn tube?
On another group there's a fairly torrid discussion right now about the latest crop of 572B tubes available on that auction site which shall not be named. Seems that a lot of unscrupulous folks are peddling rejects or counterfeits from Red China.
7311291 2015-07-03 16:01:05 Dana Myers Re: Are through hole devices going the way of the vacumn tube? 11292 2015-07-03 20:04:06 Lee Hiers Re: Are through hole devices going the way of the vacumn tube? 11293 2015-07-03 20:06:40 Lee Hiers Re: Are through hole devices going the way of the vacumn tube? 11295 2015-07-04 08:16:38 Dana Myers Re: Are through hole devices going the way of the vacumn tube?
To Jim's point - a great blog post about bogus transistors being sold via
eBay auction, complete with functional testing:
http://www.earlandrews.com/faketransistors.html
73,
Dana K6JQ