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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders.

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Old 25th Jul 2020, 3:04 pm   #1
TALKINGWITHPYE
Tetrode
 
Join Date: Oct 2018
Location: Carrickfergus, County Antrim, Northern Ireland, UK.
Posts: 61
Default Another Marconi 2955A help please

Hello all, I have a Marconi 2955a belonging to a friend. This has the internal 1.6a fuse blown but no sign of blackening inside it. The only lighting on power up is the leds above the N and BNc sockets. There is no relay click on power up. I am wondering if the BU105 is prone to going sc and possibly taking out the LOPT. I have ordered some 1.6a slow blow fuses and as the multimeter I have is a cheap and nasty one I have bought an AVO 8 mk 4 on e bay. I have told my friend not to be too optimistic but I would like to give a good go at repair. I have used these excellent devices in my working life but this is my first attempt to repair one.
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Old 26th Jul 2020, 11:47 am   #2
Dickie
Octode
 
Join Date: Sep 2004
Location: St. Albans, Hertfordshire, UK.
Posts: 1,076
Default Re: Another Marconi 2955A help please

I suggest you join the Marconi Instruments group
https://groups.io/g/Marconi-Test-Instruments

These were/are very popular and there is a wealth of experience available to help you.
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Richard, BVWS member
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Old 26th Jul 2020, 2:19 pm   #3
TALKINGWITHPYE
Tetrode
 
Join Date: Oct 2018
Location: Carrickfergus, County Antrim, Northern Ireland, UK.
Posts: 61
Default Re: Another Marconi 2955A help please

Thanks Dickie I am aware of that group.
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