Classic Rotary Phones Forum

Telephone Switching => Key Systems (Electronic, 1A2 etc) => Topic started by: Babybearjs on February 03, 2017, 10:12:16 PM

Title: 400 series card identification needed.
Post by: Babybearjs on February 03, 2017, 10:12:16 PM
enclosed are 2 photos of a 1A2 card on Ebay. I've never seen a card like this with a piggy-back board attached. seller just shows the MFD as 1977 other then that no info. can anyone ID this card, I've never seen one like this.
Title: Re: 400 series card identification needed.
Post by: pdxjim911 on February 03, 2017, 10:50:50 PM
This card is a 440A intercom designed to go into a 641A KSU which can be used with the 620 WE key system.

Title: Re: 400 series card identification needed.
Post by: unbeldi on February 03, 2017, 10:59:50 PM
Some key systems such as my 513A2 (http://www.classicrotaryphones.com/forum/index.php?topic=15137.msg157258#msg157258) KSU have two slots for 8" cards.

(http://www.classicrotaryphones.com/forum/index.php?action=dlattach;topic=15137.0;attach=131289;image)

The inductors on this card tell me that it must be one of the Touchtone adapters or TT intercom units, such as the 424B dial intercom. [Ah, yes, 440A TT adapter, thanks]
Title: Re: 400 series card identification needed.
Post by: Babybearjs on February 03, 2017, 11:40:47 PM
So, its a 440A? I don't remember seeing it in any KSSM paperwork? is it shown in any practice? what the listing number? I have the WE KSSM vol. 1 and 2 but have never seen it. is it located in another part of the BSP's?
Title: Re: 400 series card identification needed.
Post by: pdxjim911 on February 04, 2017, 11:03:59 AM
Yes, it is a 440A, the touchtone adapter for the intercom.  The BSP is in volume II of the Key Systems Service Manual, and is number 518-215-419.
Title: Re: 400 series card identification needed.
Post by: Victor Laszlo on February 04, 2017, 05:23:24 PM
It can be easily identified from the second photo, when enlarged.  It says "440A KTU" on the circuit board edge.