[Heathkit] DX-40 Pwr Xfmr

[Bill Stewart]

Hi Lee,
Shouldn't the ct to the outside legs divide the resistance and HV ac pretty much in half? In my case there is more than a few tenths of ohms or a few volts difference. I'm gonna pull the rest of the tubes and see if it still warms up...Tnx, Bill

----- Original Message -----
From: "lee" <pulsarxp at embarqmail.com>
To: "Bill Stewart" <cwopr at embarqmail.com>, "heathkit" <heathkit at mailman.qth.net>
Sent: Monday, January 30, 2012 3:27:40 PM
Subject: Re: [Heathkit] DX-40 Pwr Xfmr

I assume you are saying it gets warm right away when the transformer has 
nothing hooked to the output winding.  You certainly will see a difference 
in resistance with both halves of that transformer.  That said if nothing is 
hooked to the transformer output and it gets warm quickly,  you have a 
transformer problem.

Lee, w0vt

-----Original Message----- 
From: Bill Stewart
Sent: Monday, January 30, 2012 1:55 PM
To: heathkit
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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