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
Audio Output Transformers
Not seen this before, am i right this OPT is a single-ended one but with ultra-linear winding and also being used as a PSU choke?
Quite a standard circuit, the ripple on the HT line will be through both sections of the windings but opposing each other, less ripple in the audio output stage to the speaker.
Saves a larger reservoir capacitor.
From Radio Servicing pocket book, J.P. Hawkwer.
Frank
Posted by: @nuvistorQuite a standard circuit, the ripple on the HT line will be through both sections of the windings but opposing each other, less ripple in the audio output stage to the speaker.
Saves a larger reservoir capacitor.
From Radio Servicing pocket book, J.P. Hawkwer.
Thanks, thats interesting, was i right that the other winding is for U/L tapping??
To be honest I had not noticed the winding for the screen grid, I shouldn’t post first thing in a morning, or perhaps not at all.
Is it a Philips circuit? If you have a make and model number I will try to find out more, unless some one else answers the question.
Frank
Posted by: @nuvistorTo be honest I had not noticed the winding for the screen grid, I shouldn’t post first thing in a morning, or perhaps not at all.
Is it a Philips circuit? If you have a make and model number I will try to find out more, unless some one else answers the question.
Lol, its from a Cossor tape recorder, full story - I got a HT and OPT from ebay - i wanted the EZ80 really and it was a good price so....
Looking at the OPT it had loads of taps so very confusing, luckily the guy had the diagram too, no idea if i'll ever use the OPT but an extra in the box is never a bad thing right?? 🙂
@davek0974
I don’t know if it’s for UL type performance or if they felt it was required due to the circuit being used for the Bias oscillator in the recorder. It’s a Philips circuit, EL3515 and EL3541 are the same machines.
Frank
The osc coil S17 will resonate around 50-60Khz, doubt the output transformer will pass much to the speaker.
Philips came up with some different circuits that can confuse, they do me at times, but they usually work extremely well.
Frank
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