Warning: Creating default object from empty value in /homepages/11/d132647312/htdocs/Amfone/mkportal/include/SMF/smf_out.php on line 47
Kenyon T-489

The AM Forum
April 16, 2021, 09:26:03 PM *
Welcome, Guest. Please login or register.

Login with username, password and session length
   Home   Help Calendar Links Staff List Gallery Login Register  
Pages: [1]   Go Down
Author Topic: Kenyon T-489  (Read 2181 times)
0 Members and 1 Guest are viewing this topic.
KE7NL - Jack
Offline Offline

Posts: 45

« on: December 10, 2006, 11:01:31 AM »

In my Junque Box resides a Kenyon T-489.  The "Transformer" info on AM Window brackets that part number.  From it's physical size, I would say it is some sort of interstage device.  Can anyone tell me what it is? -- specifications? -- pin out?


Offline Offline

Posts: 4042

Brrrr- it's cold in the shack! Fire up the BIG RIG

« Reply #1 on: December 10, 2006, 11:39:02 AM »

I do not have the info on that iron.

But you can experimentally determine the specs.

An ohmeter will give you the DCR and so the winding arrangement.

Then placing a low voltage on the lowest DCR winding will give you the overall turns ratio.

If you put 1 volt AC or 10 volts AC then the turns ratio can be read out directly by the voltmeter on the secondary.  60Hz from a wall wart is sufficient.

Then use the standard equation for turns ratio : impedance ratio to find that.
The power can be guesstimated by the core size.

A comparison of the DCR of the low impedance side (assuming it's not a 1:1) to a known transformer's DCR of similar size will get you in the ball park for the original intended impedances.

Sweeping with an audio signal, using an appropriate terminating resistor will get you back the bandwidth and also help to pinpoint the optimal impedance ratio.

There's probably a better way to determine the original intended impedance ratios, but I'm not sure what that would be.


_-_- bear WB2GCR                   http://www.bearlabs.com
Jim, W5JO

Offline Offline

Posts: 2474

« Reply #2 on: December 10, 2006, 02:49:49 PM »

Kenyon T-489. is a 15 watt primary to 30 watt seconday modulation transformer.

Primary is 2K to 20K to a class C 200 to 20K.

Pages: [1]   Go Up
Jump to:  

AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
 AMfone 2001-2015
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Page created in 0.078 seconds with 19 queries.