[ARC5] Some information...

[MICHAEL ST ANGELO]

Carl,

The TL part was a TL442. I remember it well. 

Rob Sherwood replaced the original dual diode detector in the R4C with a MC1496 design. Check has excellent article in the December 1977 issue of Ham Radio Magazine om page 10:

<https://www.americanradiohistory.com/Archive-DX/Ham%20Radio/70s/Ham-Radio-197712.pdf>

Rob Sherwood used the TL442 a replacement for his MC1496 mixer since it used less biasing parts. Check this Notebook article in the October 1978 issue, page 94 in Ham Radio:

<https://www.americanradiohistory.com/Archive-DX/Ham%20Radio/70s/Ham-Radio-197810.pdf>

I have both parts and used them in various designs. I replaced the mixer in my Ten-Tec Argonaut 505 with a 1496 design.

Ham Radio Magazine was and is my favorite radio magazine. I looked forward to every issue, especially the October Receiver issues. Each issue was full of excellent application, theoretical and historical articles. I remember articles from HR but forgot what I ate last night.

Mike N2MS

> On September 12, 2019 at 4:35 PM CARL HUETHER <k1uhy at comcast.net> wrote:
> 
> 
> Ken, Im glad to see that old IC still in use.
> 
> Back in the mid 80's to late 90's when I was running RadioKit I sold a Product Detector kit to replace the poor one in the Drake R4C that used a TI IC (cant remember the designation,TL???) that became unobtainium and adapted the round can version of the 1496. I used my own R4C as the test bed.
> 
> I probably still have some in a parts cabinet.
> 
> For tube versions I like the Pullen (also in the mixer) but it is a bit more involved with bullet proof no overloading.
> 
> Carl
>