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Post by numbersix on Sept 30, 2009 16:06:16 GMT -5
I have a tram d201 that i can,t seem to get the meter zero properly, been doing it as the manual say,s change out tubes v401,v402, v502, v602 talk on it check it again meter is showing difference, turn it off and when i turn it on again after warm meter not zero what,s the problem? ajustment per manual 1/2 hour warm up, in crystal position, blank between 22 an 23, meter switch in s/pwr position, rf gain fully ccw.
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Post by Marc on Sept 30, 2009 16:28:27 GMT -5
Mine takes about an 1 Hr to settle down. When I set it I waited for about 1 1/2 Hrs then set it . could just be different due to age and mileage.
mine starts out low by about 3 needle widths and slowly moves up to 0.
Make sure to clean the trimer pot that control the setting.
Marc
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Sandbagger
Administrator/The Boss 
Posts: 6,250 
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Post by Sandbagger on Sept 30, 2009 18:37:34 GMT -5
I have a tram d201 that i can,t seem to get the meter zero properly, been doing it as the manual say,s change out tubes v401,v402, v502, v602 talk on it check it again meter is showing difference, turn it off and when i turn it on again after warm meter not zero what,s the problem? ajustment per manual 1/2 hour warm up, in crystal position, blank between 22 an 23, meter switch in s/pwr position, rf gain fully ccw. My D201 meter used to be very hard to set. No matter how long it was on, the zero would shift. Then I changed the meter tubes with a matched set of new tubes and it got a lot better. It still drifts while it warms up, but it settles down after that. I also cleaned the zero pot to get the "static" out of it. You might also want to heck the resistors which feed the tubes and the power supply voltages themselves. The Tram is one of the worst radios for placing a heavy load on resistors causing them to change value. If the power supply voltages drift, that will also cause a shift in the meter zero. The Tram is one of those radios that really benefits from the "100,000 mile tuneup". So many parts are stressed in that radio, that the more you replace, the more reliable it becomes. |
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Post by numbersix on Sept 30, 2009 21:01:34 GMT -5
This radio had the 100.000 mile tuneup about 2 yrs ago from Barkett.
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