[Heathkit] DX-40 Pwr Xfmr

[Bill Stewart]

The verdict is in...its shorted. I took it out and put 60vac on it and its now nice and toasty. Looks like a trip up north for the ole tranny. 

One question: those who have had transformers re-wound, do you have them re-wound to today's line voltages? or keep 'em to the old spec...mine L/V is in the 125v range. 
Tnx for all the suggestions...73 de Bill K4JYS

----- Original Message -----
From: "Bill Stewart" <cwopr at embarqmail.com>
To: "heathkit" <heathkit at mailman.qth.net>
Sent: Monday, January 30, 2012 2:55:09 PM
Subject: [Heathkit] DX-40 Pwr Xfmr





Good afternoon: 

My trusted DX-40 is blowing its fuse. After some initial checks, I have disconnected the HV leads and made the following measurements: Total HV winding resistance: 312 ohms 

Outside-to-ct: 181ohms/344 vac.... 

Outside-to-ct: 131 ohms/274 vac. The ac measurements are made with 60vac at the plug. 

The xfmr gets warm even tho the on time is short. 

  

Would ya say this resistance/ac voltage imbalance would indicate a tranny problem? 

Thanks, 73 de Bill K4JYS 

  

 
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