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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only.

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Old 15th Apr 2021, 6:50 pm   #1
Dick Glennon
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Default Powering up a Philips 730A for the first time.

hi again, I am about to power up the 730A for the first time. I have an isolation transformer, a dim bulb tester and a variac. I want to try at all costs to save the valves if something were to go wrong but I can only blame myself . Any suggested precautions would be greatly appreciated. Dick.
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Old 16th Apr 2021, 9:30 am   #2
Station X
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Default Re: Powering up a Philips 730A for the first time.

Lot's of useful info here:-

https://www.vintage-radio.com/repair...ing-power.html
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Keep the soldering iron hot.
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Old 21st Apr 2021, 8:15 pm   #3
Silicon
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Default Re: Powering up a Philips 730A for the first time.

I put a 1 amp fuse in the mains plug.

I sometimes wire in a series resistor after the reservoir capacitor and measure the voltage across it to monitor the HT current.

It is often the abnormally high currents that do the damage.
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