Granada Television Brochure, 1970s
Long Gone UK TV Shops
Memories of a Derwent Field Service Engineer
PYE Australia Circa 1971
Radios-TV VRAT
Fabulous Fablon
Thorn TX10 Chassis
Crusty-TV Museum, Analogue TV Network
Philips N1500 Warning!
Rumbelows
Thorn EMI Advertising
Thorn’s Guide to Servicing a VCR
Ferguson 3V24 De-Robed
Want to tell us a story?
Video Circuits V15 – Tripler Tester
Thorn Chassis Guide
Remove Teletext Lines & VCR Problems
Ceefax (Teletext)
Suggestions
Website Refresh
Colour TV Brochures
1970s Lounge Recreation
CrustyTV Vintage Television Museum
Linda Lovelace Experience
Humbars on a Sony KV2702
1972 Ultra 6713
D|E|R Service “The Best”
The one that got away
Technical information
The Line Output Stage
The map
Tales of a newly qualified young engineer.
Tales of a Radio Rentals Van Boy
Sanyo SMD
Disastrous Company Rebranding
1969 Philips G22K511
Memories Of The TV Trade
Crazy house
Dirty TV screens
Dual Standard and Single Standard CTV’s
Radios-TV on YouTube
The Winter of 62/63
A domestic audio installation
1979 Ferguson Videostar Deluxe 3V16
Music centre modifications
Unusual record player modification
B&K 467 Adapters
Mishaps In The Trade
1971 Beovision 3200
1971 Bush CTV1120
Granada Television Brochure, 1970s
Long Gone UK TV Shops
Memories of a Derwent Field Service Engineer
PYE Australia Circa 1971
Radios-TV VRAT
Fabulous Fablon
Thorn TX10 Chassis
Crusty-TV Museum, Analogue TV Network
Philips N1500 Warning!
Rumbelows
Thorn EMI Advertising
Thorn’s Guide to Servicing a VCR
Ferguson 3V24 De-Robed
Want to tell us a story?
Video Circuits V15 – Tripler Tester
Thorn Chassis Guide
Remove Teletext Lines & VCR Problems
Ceefax (Teletext)
Suggestions
Website Refresh
Colour TV Brochures
1970s Lounge Recreation
CrustyTV Vintage Television Museum
Linda Lovelace Experience
Humbars on a Sony KV2702
1972 Ultra 6713
D|E|R Service “The Best”
The one that got away
Technical information
The Line Output Stage
The map
Tales of a newly qualified young engineer.
Tales of a Radio Rentals Van Boy
Sanyo SMD
Disastrous Company Rebranding
1969 Philips G22K511
Memories Of The TV Trade
Crazy house
Dirty TV screens
Dual Standard and Single Standard CTV’s
Radios-TV on YouTube
The Winter of 62/63
A domestic audio installation
1979 Ferguson Videostar Deluxe 3V16
Music centre modifications
Unusual record player modification
B&K 467 Adapters
Mishaps In The Trade
1971 Beovision 3200
1971 Bush CTV1120
Megger Help needed
I have a Megger in the mottled Bakelite case that I have never used.
I need an instruction leaflet and some leads, the side holes for the leads look unusual.
The needle is drifting around in the middle,should it?
Has anyone managed to fix one of these?
Boater Sam
The wandering needle is normal and part of the design- it has been explained to me why, but I forget! There's not much to using- connect, crank and read, just keep small children and animals away from the DUT....
These are good little beasties, and something of a classic- one problem that can occur with them is that there is an RC snubber across the generator output with a 50nF capacitor that, you've guessed it, goes leaky and limits the maximum output voltage. A quick test is to stick a decent high-impedance meter like a standard 10M DMM across the terminals and crank away- if it's the "usual" 500V version, the output will peak at, er, around 500V- much lower than this and the capacitor is a suspect. You'll also find cranking much easier if the capacitor was leaky and is replaced....
The standard capacitor is labelled 1500V TEST- I take the liberty of assuming that this means 1.5x normal working and use a 1kV type.
We used these at work, although they were superannuated, as they could deliver enough energy to "fry out" slightly damp and leaky (low tens of megs) TV camera triaxial cable that otherwise gave PSU start-up problems- a bout of 20-30 seconds cranking and hey, presto. Eventually, the powers-that-be withdrew them from service, as this energy capability was deemed dangerous. Some of us simply secreted one and continued using them stealthily....
I've mentioned the 4mm plug dodge on UKVRRR.
- 33 Forums
- 7,927 Topics
- 116.2 K Posts
- 8 Online
- 510 Members