[JMS] Millen 90640 Frequency Determination Unit - Do Any Exist?

[W1LSB - George]

Very interesting Don & Bob!   At first I thought it could have been Millen's attempt at trying to get some post war BC-221 business, but the tube count is WAY off, and as you mentioned Bob, it looks very similar to the 91501 receiver.  Good mystery!

73, George - W1LSB

-----Original Message-----
From: james_millen_society-bounces at mailman.qth.net [mailto:james_millen_society-bounces at mailman.qth.net] On Behalf Of Robert A Sullivan
Sent: Monday, January 30, 2023 4:15 PM
To: Don Buska - The Radio Lab Works; The James Millen Society Members Email Reflector
Subject: Re: [JMS] Millen 90640 Frequency Determination Unit - Do Any Exist?

I’ve never seen one but the dial and buttons sure look like this! (501 receiver)
See page 8 of the 1947-48 Millen catalog.

73, Bob
WØYVA
Personal site: isquare.com <http://isquare.com/>











> On Jan 30, 2023, at 3:24 PM, Don Buska - The Radio Lab Works <don at radiolabworks.com> wrote:
> 
> Has anyone ever seen this beast, or was it yet another item that was in the Millen catalog but never seen the light of day?  It's a hybrid of the old Frequency Meter, standard crystal oscillators and an HF Receiver.  I just saw this in the Millen 1946 - 1947 Electronic Laboratory Equipment Catalog that's for sale on eBay right now. I did snag a picture of the unit and the description from the eBay ad and have it on my website for your review.
> 
> Picture of the 90640 Frequency Determination Unit:
> 
> https://www.radiolabworks.com/files/Millen/90640%20Picture.png
> 
> Description of the unit:
> 
> https://www.radiolabworks.com/files/Millen/90640%20Desc.png
> 
> Personally I've never seen one, but that's not to say this wasn't a special contract build for Millen and they just decided to put it in their catalog.  That wouldn't be the first time for them.  Also of note are some similarities to items incorporated into their two ham receivers that were advertised a year later, but that also never made it to formal production. I can't imagine this was a low cost item!
> 
> Enjoy es 73
> Don N9OO
> ______________________________________________________________
> James_Millen_Society mailing list
> Home: http://mailman.qth.net/mailman/listinfo/james_millen_society
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:James_Millen_Society at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

______________________________________________________________
James_Millen_Society mailing list
Home: http://mailman.qth.net/mailman/listinfo/james_millen_society
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:James_Millen_Society at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html