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 Return to top of page · Post #: 16 · Written at 8:52:49 AM on 23 August 2013.
AndyRBin's Gravatar
 AndyRBin
 Location: Chuwar, QLD
 Member since 12 August 2013
 Member #: 1395
 Postcount: 29

Hi Marcc What wattage should I try to obtain.
 
 Return to top of page · Post #: 17 · Written at 9:06:25 AM on 23 August 2013.
Marcc's avatar
 Marcc
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5256

I would not go below 5W . If there is a voltage drop across it that is listed eg Voltage at the cathode of the rectifier and the B+ rail after the field /choke

One can deduce from the voltage & resistance (Ohms law) the current. eg 40 to 60mA. Square the current & multiply by resistance and that will give the wattage that needs to be dissipated.

If it exceeds the resistor then two 5 Watt resistors of 1200 ohms will give you 600 Ohm. Higher wattage resistors are about. Resolution of that should not be much of an issue.

Marc
 
 Return to top of page · Post #: 18 · Written at 3:04:31 PM on 23 August 2013.
MonochromeTV's avatar
 MonochromeTV
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1182

Hi,

If you still want to go with the filter choke replacement, have a look at Hammond type 157L.

http://www.hammondmfg.com/153.htm.

Its specs look pretty close to what you want.

Cheers.
 
 Return to top of page · Post #: 19 · Written at 8:47:40 AM on 24 August 2013.
AndyRBin's Gravatar
 AndyRBin
 Location: Chuwar, QLD
 Member since 12 August 2013
 Member #: 1395
 Postcount: 29

The resistance is 400R where the original is 550R.

Would it be adviseable to add 150R resistor in line.

Andy
 
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