[R-390] Sync Det II

[Gary Geissinger]

Guys,

The SA612 is a good substitute for the NE602; they are in stock at Mouser in the DIP package $2.25 each.

The SA604 is a good substitute for the NE604; there some in the DIP package on Ebay.
The SOIC16 package SA604 is available from a number of sources including Digikey and Mouser; there are a number of adapter boards available that convert them into more "prototype friendly" packages.  Some are even on Amazon.com.  For a little more money there are adapters that socket the SOIC part so that the adapter is reusable and no surface mount soldering is required.  For example: 

http://www.amazon.com/OTS-16-1-27-03-SOIC16-Enplas-Programming-Adapter/dp/B00EO7XA4S/ref=sr_1_1?s=electronics&ie=UTF8&qid=1383103474&sr=1-1&keywords=SOIC+adapter+socket


Gary WA0SPM


--------------------------------------------
On Tue, 10/29/13, Gordon Hayward <ghayward at uoguelph.ca> wrote:

 Subject: Re: [R-390] Sync Det II
 To: r-390 at mailman.qth.net
 Date: Tuesday, October 29, 2013, 8:42 PM
 
 The NE602 is nice but as you say,
 unobtanium.  If I ever come across
 some at a hamfest, I'll buy them all.  I use the
 Motorola MC1496P
 which, although just as old is still available.  For
 the design,
 I just follow the app notes on the spec sheet.  I've
 used it in a
 VLF converter for the 390 and in the dual product detector
 attached to the IF out.  I haven't used anything like
 the NE604
 yet.
 
 For drawing schematics I use express sch which is a free
 download
 from express pcb.  It will create bit images from the
 schematics.
 
 Cheers, Gord VE3EOS
 
 ----- Original Message -----
 From: "Perry Sandeen" <sandeenpa at yahoo.com>
 To: r-390 at mailman.qth.net
 Sent: Tuesday, October 29, 2013 10:05:39 PM
 Subject: [R-390] Sync Det II
  
 List, 
  
 The ski that Al sent me from the QST is the one I
 was thinking about and I started re-drawing it with
 photoshop elements as a bit
 image.
  
 Several hours down the road working on the
 schematic I decided to see what IC’s were used.
  
 Then I discovered a major problem.  They all seem to be
 “unobtainium”.
 The one source listed is out of business.  My search on
 Ebay didn’t show anything except
 two surface mount NE602 pieces.  I didn’t
 follow up on the IF subsystem that was used for
 availability. 
  
 Unless someone has sources for these IC’s this
 becomes a dead end project unless some on the list is able
 to redesign it with
 available components.  Redesigning it is
 far beyond my skills.
  
 The project needs two NE602 and one NE604 FM IF
 subsystem IC’s.  If anyone wants to
 search them out and they are available at a somewhat
 reasonable price the list
 would appreciate the info.
  
 Regards,
  
 Perrier
  
 P.S. If anyone is interested I have a 20 gallon SS
 single column still for sale.  Shipping
 weight exceeds 100 pounds in two boxes.  Requires
 two 220 volt water heater heating elements and control
 circuit, not included.
  
 Remember it’s not too early to get ready for the
 upcoming holiday festivities! Contact me off line please.
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