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Author Topic: unavailable icom parts source  (Read 1505 times)
KC7STK
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Posts: 6




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« on: April 05, 2014, 05:47:47 PM »

Hi all,
      Does anyone know where I can obtain 1ss312 diodes and 2sk2218 jfets for my icom 738?  I called icom service several years ago trying to get these. No help at all!  73, Phil
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W9FIB
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Posts: 789




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« Reply #1 on: April 06, 2014, 12:45:14 AM »

1ss312 - http://www.mouser.com/ProductDetail/Toshiba/1SS312T5LFT/?qs=DoXglgvjXWLUIn9ckhcgMw==

2sk2218 seems to be obsolete. You may need to get a data sheet and find a similar replacement. I quick search of the web did not show a direct cross reference. Or maybe someone has a cross reference already. Hope they will share if they do.
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KC7STK
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Posts: 6




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« Reply #2 on: April 06, 2014, 02:53:04 AM »

Stan,
         Thanks for taking the time looking up the parts at mouser. I used them alot a few years ago. the search layout has changed, They don`t seem to have the inventory they used to have. I found a outfit that I think is based in hong kong, But will wait and see what comes of it. it is a " please enter quantity of parts needed, will contact with quote" type of deal.
 `73'
        Phil
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W9GB
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Posts: 2626




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« Reply #3 on: April 06, 2014, 06:13:58 AM »

Phil -

The Japanese radio manufacturers (Icom, Kenwood, Yaesu) use Japanese or Eastern Asian
manufacturers (Toshiba, Sanyo, NEC, Mitsubishi, Panasonic, Sony, etc.) for supplying OEM components.

These Eastern Asian manufacturers use the Japanese Industrial Standard (JIS) for transistor and diode part numbers.  The specification is found and outlined in: JIS-C-7012
1S and 2S are common prefixes.

Your 2SK2218 part is: Sanyo N-Channel Junction Silicon FET
Here is the Sanyo Datasheet:
http://pdf.datasheetcatalog.com/datasheet/sanyo/dis_pdf_e/2SK2218.pdf

In North America, our manufacturers use the Joint Electron Devices Engineering Council (JEDEC) numbering.  
1N and 2N are common prefixes.

Earl Andrews, VE3AB in Elliot Lake, Ontario - Canada (NE of Sauté Saint Marie) has been acquiring a number of surplus / obsolete transistors used in amateur radio equipment, especially for Yaesu.
http://www.earlandrews.com/index.html

NOTE: Earl is finding a 20% FAILURE Rate (parts) with Chinese/eBay vendors.
http://www.earlandrews.com/dgmosbadagn1.html

Dual-Gate MOSFET Shootout, the 3N211 wins
http://www.earlandrews.com/dgshootout.html
Motorola 3N211
http://www.earlandrews.com/files/3n211.pdf

Transistors (Wikipedia)
http://en.wikipedia.org/wiki/Transistor
« Last Edit: April 06, 2014, 06:40:04 AM by W9GB » Logged
N4NYY
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Posts: 4799




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« Reply #4 on: April 06, 2014, 06:33:32 AM »

Man. I do not see and cross anywhere for a 2sk2218. Not only that, there are none on ebay. And that says a lot. May be time to move on from that radio.
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W9GB
Member

Posts: 2626




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« Reply #5 on: April 06, 2014, 06:44:25 AM »

Just a matter of finding a suitable JFET substitute.

I would suggest contacting Scott Malcom -- MTS Radio Repair
http://www.angelfire.com/biz2/mts/
he stocks older Icom parts and worked for Icom Service when that radio was new.
He will also be aware of suitable substitutes.
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