[ARC5] Transistorized ARC-5 Receiver

[Glen Zook]

Plastic 2N4416 transistors, which are, basically, the same as the MPF-102, are still available from Mouser.


Leaded J-310 are also available from Mouser for $3.47 in single quantities and for $2.79 each in quantities of 10.  The surface mount J-310 are available for as little as $0.31 in single quantities and $0.201 (yes, $0.201) each in quantities of 10 (make for total of $2.01 for 10) again from Mouser.

 Glen, K9STH 
Website: http://k9sth.net

      From: MICHAEL ST ANGELO <mstangelo at comcast.net>
 To: Phillip Carpenter <carpenterpa at tds.net>; Brian <brianclarke01 at optusnet.com.au>; Jim Haynes <jhhaynes at earthlink.net> 
Cc: arc5 at mailman.qth.net
 Sent: Monday, January 2, 2017 10:17 AM
 Subject: Re: [ARC5] Transistorized ARC-5 Receiver
   
 Brian,

That's the path I took; replaced all circuitry except the frequency determining components such as the capacitors, inductors and transformers. If someone is concerned about upgrading a set with tubes there are lots of carcasses around minus the tubes to resurrect.

MPF-102's have been obsolete for years but J310 are still being produced and is a better alternative. Unfortunately the production of leaded thru-hole devices has been discontinued but SMT devices are available.

I purchased leaded J310s from Arrow Electronics last year. I checked today and they are on backorder.

I also stocked up an leaded bipolar transistors such as the 2N3904 and 2N3906 at that time. 

Dan's Small Parts still has leaded devices.

With regards to plug-in replacements I would be more interested with solid state replacements for some of the transmitting tubes which are hard to find such as the 211E in the BC-375.


   
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