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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets.

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Old 4th Nov 2021, 6:08 pm   #41
HoverJohn
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Default Re: When is a part “dead”….(length of string question)

I was wondering if anyone’s used adhesive cable tie anchors and just taken the easy route?
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Old 4th Nov 2021, 6:39 pm   #42
Hartley118
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Default Re: When is a part “dead”….(length of string question)

That works too - if you’ve got something to tie the cable ties to.

Martin
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Old 4th Nov 2021, 7:19 pm   #43
Uncle Bulgaria
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Default Re: When is a part “dead”….(length of string question)

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Originally Posted by HoverJohn View Post
All grid couplers ordered too god knows how it didn’t go bang when I turned it on.
I've found this document very helpful to avoid the bang and associated sinking of the heart.

I don't agree with everything he says, but it's a good aide memoire to be careful to avoid having to fix extra problems caused by being too keen.
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Old 5th Nov 2021, 12:12 am   #44
Refugee
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Default Re: When is a part “dead”….(length of string question)

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I measure leakage current by measuring the voltage across a resistor connected in series with the power feed to the capacitor. If a 10k resistor is used each volt measured across it represents 10mA of leakage current.
It looks like you have had a decimal point slip there.
I have just worked it out at 100uA.
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Old 5th Nov 2021, 8:13 am   #45
Station X
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Default Re: When is a part “dead”….(length of string question)

Senior moment. I should have said 100R as used in this reformer:-

https://www.vintage-radio.com/projec...-reformer.html

10k is the current limiting resistor.
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Old 7th Nov 2021, 11:58 am   #46
HoverJohn
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Default Re: When is a part “dead”….(length of string question)

Ok I have the advantage that I knew it was all working not that long ago and powered up recently.
Just recapped the pre amp and taking on amp next …. That has a few drifty resistors too.
JB
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