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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment.

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Old Yesterday, 8:49 pm   #61
Humptydumpty
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Default Re: Trio 9R-59D receiver problems.

Done Thank you ..
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Old Yesterday, 9:38 pm   #62
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Default Re: Trio 9R-59D receiver problems.

I've sent you three components all have which have been tested and found to be good.

C34 replacement 0.01uF 400 Volt. Coupling capacitor.
R35 replacement 330R 2W. Cathode resistor.
C37 replacement 10uF 25V. Cathode bypass capacitor.

Only fit C34 at this time, it can be fitted either way round. The other components may not need to be replaced. You will note that it is a 400 Volt component, but that's more than adequate for a coupling capacitor.

Once you've fitted it check that the set is functional and then take DC voltage readings on all pins of V8 except pins 3 and 4 which are the heaters. Post the results here for analysis.

You can check the resistance of R35 before fitting C34. Its value should be within 10% of 330R, Expect your meter to take time to settle down to a steady reading as it'll be charging up C37 which is in parallel with R35.

I'll be away from home for a few days so I won't be able to respond to your posts as quickly as I've done up to now. If there's a problem with that hopefully another member will be able to assist you.
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Old Today, 12:50 am   #63
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Default Re: Trio 9R-59D receiver problems.

Post 55 Graham you said 600wv so now i fit the 400 wv instead .Is that correct ? If not i will wait for your return .Mind how you go .Trev

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Old Today, 1:01 am   #64
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Default Re: Trio 9R-59D receiver problems.

As Graham said to fit this 400wv instead of the 600WV thats in the receiver now can someone give me the go ahead on this lower value replacment of C34 ..
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Old Today, 10:02 am   #65
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Default Re: Trio 9R-59D receiver problems.

Can i ask? the value of 600wv - 20% = 480 wv Will the 400 wv capacitor Graham so kindly posting out to me be ok to fit ?. I read some place rule of thumb is to go above the value but not below .
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Old Today, 10:37 am   #66
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Default Re: Trio 9R-59D receiver problems.

As stated in #62. A 400 Volt replacement is adequate for C34.

John
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Old Today, 11:19 am   #67
Humptydumpty
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Default Re: Trio 9R-59D receiver problems.

Thank you John ...
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Old Today, 11:30 am   #68
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Default Re: Trio 9R-59D receiver problems.

Quote:
Originally Posted by Humptydumpty View Post
Can i ask? the value of 600wv - 20% = 480 wv Will the 400 wv capacitor Graham so kindly posting out to me be ok to fit ?. I read some place rule of thumb is to go above the value but not below .
20% relates to the tolerance value of the capacitor, eg: the capacitance value of a 0.01uF +- 20% capacitor could be between 0.008uF and 0.012uF when it was manufactured.

Lawrence.
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Old Today, 11:52 am   #69
Humptydumpty
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Default Re: Trio 9R-59D receiver problems.

Lawrence
I learn more each day .And if you dont ask then you will never know ..Thanks just need to wait now till Grahams parts arrive . Thank you both .
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